Entity map
Every thing Lemonsignal is, what it is connected to, and where the site says so. For the same facts in sentences, see AI instructions.
Lemonsignal
Organization
The company behind the Lemonsignal AI skills assessment for hiring, at lemonsignal.io. Founded in 2026. Based in Estonia, through Feynman OÜ, with a team working remotely worldwide. It was called Hour until October 2026.
- Offers: Lemonsignal, the product
- Co-founded by: Lushane Mugunthan
- Co-founded by: Radoslaw Holewa
- Run through: Feynman OÜ
- Customer: Miquido
- Publishes: AI skills in job ads, 2026
- Publishes: The agent audit 2026
“Lemonsignal was called Hour (usehour.com) until October 2026.” Lemonsignal for LLMs
“run by Feynman OÜ, a company registered in Estonia” Affiliate terms
Lemonsignal, the product
Software
An AI skills assessment for hiring. Candidates do a real work task in their own AI tool, and the hiring team sees a score, six AI skills and the full conversation with the AI.
- Measures: AI skills
- Shows: Session replay
- Runs in: Claude Code, Codex, Claude Cowork, ChatGPT
- Sold as: Lemonsignal pricing
“Lemonsignal (lemonsignal.io) is an AI skills assessment for hiring.” Lemonsignal for LLMs
“Candidates do a real task from the job with the AI tool they already use. We record their whole conversation with the AI, score six skills from it, and link every score to the exact message it is based on.” How we score
Lushane Mugunthan
Person
Co-founder of Lemonsignal.
- Co-founder of: Lemonsignal
Radoslaw Holewa
Person
Co-founder of Lemonsignal.
- Co-founder of: Lemonsignal
Feynman OÜ
Organization
The company registered in Estonia that runs Lemonsignal.
- Runs: Lemonsignal
“run by Feynman OÜ, a company registered in Estonia” Affiliate terms
Miquido
Customer
A software agency and a Lemonsignal customer.
- Customer of: Lemonsignal
AI skills assessment
Category
A test of how well someone works with AI, used in hiring. Also called an AI skills test, an AI fluency assessment or an AI fluency test.
- Measures: AI skills
- Example: Lemonsignal, the product
“Give them a real task from the job, let them use their own AI tool, and read the conversation afterwards.” How we score
AI skills
Concept
What a person does to get good work out of an AI tool. Lemonsignal names six, each read from how a candidate does one real task.
- Includes: Understand
- Includes: Brief
- Includes: Check
- Includes: Correct
- Includes: Sign off
- Includes: Reuse
“AI skills are what a person does to get good work out of an AI tool.” How we score
Understand
AI skill
Do they understand the task before handing it to AI?
- Part of: AI skills
Brief
AI skill
Do they give AI what it needs?
- Part of: AI skills
Check
AI skill
Do they catch it when AI is wrong?
- Part of: AI skills
Correct
AI skill
Do they fix it when it isn’t working?
- Part of: AI skills
Sign off
AI skill
Is what they hand over ready to send?
- Part of: AI skills
Reuse
AI skill
Do they make it repeatable?
- Part of: AI skills
Levels
Scale
Each skill is scored at one of these levels: Weak, Partial, Solid, Strong, Not tested.
| Level | Points | What it means |
|---|---|---|
| Weak | 0 points | They did the opposite, at a moment that asked for the skill, and did not recover. |
| Partial | 1 point | Some of what the scoring sheet asks for, or met late. |
| Solid | 2 points | Everything the scoring sheet asks for. |
| Strong | 3 points | Everything the sheet asks for, plus the one thing that marks the best answers. |
| Not tested | No points | The task gave them no chance to show it, or the evidence conflicts. It never counts against them. |
“Levels: Weak, Partial, Solid, Strong, or Not tested (never counts against anyone).” Lemonsignal for LLMs
“Met some of the checkpoints, or met them only late in the task.” How we score
“Met every checkpoint for the skill.” How we score
“Met every checkpoint, plus the extra one that only the best work shows.” How we score
“The task gave no clear chance to show the skill, or the evidence points both ways.” How we score
Task
Product feature
A real piece of work from the role, from our library or from your own team.
- Part of: Lemonsignal, the product
- Scored with: Scoring sheet
“Each task is real work from the role.” Tasks
“Pick a task from our library or bring your own, and invite candidates from your Lemonsignal dashboard.” Lemonsignal
Scoring sheet
Method
The list of checkpoints a task is scored against, written in advance.
- Produces: Levels
“Every task has a scoring sheet, written before any candidate takes it.” How we score
“Each task has a spot where AI usually gets it wrong.” How we score
Score
Metric
A percentage: the points earned across the six skills, out of the points possible.
- Built from: Levels
“Each skill earns points: Weak 0, Partial 1, Solid 2, Strong 3. The score is the points earned out of the points possible. Solid in all six is 12 of 18, so 67%.” How we score
Recommendation
Metric
Whether the person meets what the role must have. It can differ from the score.
- Sits beside: Score
“The recommendation is one of: Strong match, Good match with one open question, Below the bar, or Not enough evidence.” How we score
Job skills
Concept
Two or three skills for the role, read from the same task, so the work itself is judged as well as the use of AI.
- Sits beside: AI skills
“In a full assessment, Lemonsignal also reads two or three skills for the role, on the same piece of work.” How we score
First read
Method
Lemonsignal reads the session first. The hiring team checks that read and makes the decision.
- Based on: Session replay
“Lemonsignal gives a first read of each session. Your hiring manager or recruiter watches the session, checks the read and can add comments. They decide.” How we score
Interview question
Product feature
A question for the next interview, about one moment in the candidate’s session.
- Part of: Lemonsignal, the product
“A score for the role, the six skills with the moment behind each, and a question for the interview.” Lemonsignal
Candidate result
Product feature
What the candidate gets back after the task.
- Part of: Lemonsignal, the product
“You get your result back: every skill, the moment it’s based on, and what to work on next.” For candidates
AI fluency
Concept
Being able to get good, correct work done with AI.
- Tested by: Lemonsignal, the product
“AI fluency is being able to get good, correct work done with AI.” What is AI fluency?
Session replay
Product feature
A candidate’s full conversation with the AI: the prompts, commands and edits on one timeline, and the moments that explain the result.
- Part of: Lemonsignal, the product
“A session replay of each candidate: what they asked the AI, what it did, and what they checked.” Lemonsignal for LLMs
Claude Code, Codex, Claude Cowork and ChatGPT
AI tools
The AI tools candidates do the task in. They use the one they already use.
- Used by: Lemonsignal, the product
Roles covered
Audience
There is a task for each of these roles: Engineering, Product, Design, Marketing, Data, Finance.
AI skills in job ads, 2026
Dataset
A data report from 39,564 job ads at 1,333 software companies. 25% ask candidates to use AI, 10% as a requirement.
- Published by: Lemonsignal
“From every open ad at 1,333 software companies.” AI skills in job ads, 2026
The agent audit 2026
Dataset
A test of whether an AI agent can fill in a job application, on one open role at 20 software companies.
- Published by: Lemonsignal
“It reached the submit button every time, in a median of 52 seconds.” The agent audit 2026
HackerRank
Other assessment tool
HackerRank tests developers in its own coding environment, with a built-in AI assistant. Lemonsignal gives people in any role a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“HackerRank tests developers in its own coding environment, with a built-in AI assistant. Lemonsignal gives people in any role a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs HackerRank, checked 14 Oct 2026
| HackerRank | Lemonsignal | |
|---|---|---|
| What candidates do | Coding tests and interviews, including real-world coding questions, and a 30 minute session with Chakra, an AI interviewer | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | An AI assistant built into HackerRank’s own environment. The screen on their site notes that it “will not provide solutions directly”. Their site does not say whether candidates can use their own tools | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | A rubric. Scorecard Assist fills it in from the transcript, the code and the tests; the interviewer reviews | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Mainly developers. Their site also shows support, GTM engineer and product manager roles | Engineering, product, design, marketing, data and finance |
| Watching for cheating | Flags such as tab switching, copy-paste and unauthorised tools | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | Test and interview results with the AI conversation captured | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose HackerRank if
- You hire mostly developers, at high volume, and want a large library of coding questions.
- You need live coding interviews with an interviewer on the call.
- You need enterprise checks they list, such as SOC 2 Type II and ISO 27001.
Choose Lemonsignal if
- You hire for roles outside engineering, too.
- You want candidates in the AI tool they would use in the job, not a built-in one.
- You want to watch the whole session yourself, and see the moment behind every score.
CodeSignal
Other assessment tool
CodeSignal runs AI skills simulations in its own platform, from 20 minute AI literacy checks to 90 minute technical ones. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“CodeSignal runs AI skills simulations in its own platform, from 20 minute AI literacy checks to 90 minute technical ones. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs CodeSignal, checked 14 Oct 2026
| CodeSignal | Lemonsignal | |
|---|---|---|
| What candidates do | Simulations of real work: AI chat, prompt design, AI-assisted coding and scenario-based tasks. 20 to 30 minutes for AI literacy, 60 to 90 for technical. Also short interviews with an AI interviewer | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | The AI inside CodeSignal’s platform, called Cosmo in the screen on their site; you choose which models power it. Their site does not say whether candidates can use their own tools | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | Proficiency levels per AI skill. Their site says the assessments are designed by AI experts and validated by I-O psychologists, and does not say who scores them. In AI interviews the AI rates, tuned to match your reviewers, and people decide | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Technical AI roles, and AI skills for sales, marketing, HR and other teams | Engineering, product, design, marketing, data and finance |
| Watching for cheating | Proctoring, and cheating and fraud flags | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | Proficiency levels across AI skills. After an AI interview, a report with an overall score, a rating per skill and key insights, and the transcript | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose CodeSignal if
- You want short, standard AI checks for many candidates at once.
- You want the same standard test across the whole company.
- You also hire engineers with CodeSignal’s coding tests.
Choose Lemonsignal if
- You want to see real work, not a simulation, for the roles that matter most.
- You want candidates in their own AI tool and setup.
- You want to watch the whole session yourself, and see the moment behind every score.
TestGorilla
Other assessment tool
TestGorilla has a library of 350+ short tests, including AI fluency scenarios and interviews with an AI avatar. Lemonsignal gives candidates one real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“TestGorilla has a library of 350+ short tests, including AI fluency scenarios and interviews with an AI avatar. Lemonsignal gives candidates one real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs TestGorilla, checked 14 Oct 2026
| TestGorilla | Lemonsignal | |
|---|---|---|
| What candidates do | Scenario-based AI fluency tasks, and AI interviews run by an AI avatar that asks follow-up questions. Plus 350+ other tests; most assessments take 10 to 45 minutes | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | Their AI fluency page says candidates do realistic work using AI and choose a tool, and does not say which tools. Their assessments page says AI assistants are blocked before an assessment starts | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | Scores benchmarked against expert ratings, each with an explanation you can override. Their site does not say whether a person scores each candidate | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Any role, including marketing, product, operations, HR and customer success | Engineering, product, design, marketing, data and finance |
| Watching for cheating | ID checks with a government ID and a live selfie, full-screen monitoring, copy-paste blocking, and flags such as tab switches | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | Scores on their five pillars of AI fluency, one comparable score per candidate, and for AI interviews a percentile and a score per question | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose TestGorilla if
- You want to screen a large number of applicants early, with short tests.
- You want one platform for many kinds of test, not only AI skills.
- You want an AI-run interview as an early screen.
Choose Lemonsignal if
- You have a shortlist and want to see how each person does the real work with AI.
- You want candidates in the AI tool they would use in the job.
- You want to watch the whole session yourself, and see the moment behind every score.
CoderPad
Other assessment tool
CoderPad gives candidates a real assignment and real files in its own pad, with Claude, GPT, Gemini and Llama built in. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“CoderPad gives candidates a real assignment and real files in its own pad, with Claude, GPT, Gemini and Llama built in. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs CoderPad, checked 14 Oct 2026
| CoderPad | Lemonsignal | |
|---|---|---|
| What candidates do | Coding tests and live coding interviews with multi-file projects, and AI fluency tasks with real files for roles such as marketing, sales and product. Qualify adds recorded video answers | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | AI Assist inside CoderPad, with Claude, GPT, Gemini and Llama built in. Their site says candidates do not bring their own accounts | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | Your interviewers, live and from the replay. Screening projects are auto-graded, and Qualify uses an AI reviewer. The replay on their site shows an AI fluency score; their site does not say how it is worked out | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Mainly engineering. Their site also covers analysts, marketing, sales, customer success, product and ops | Engineering, product, design, marketing, data and finance |
| Watching for cheating | Code playback, similarity checks, tracking when candidates leave the editor, randomised questions and webcam proctoring | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | A replay of every prompt, edit, model switch and AI response, with a usage summary, plus test reports for screening | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose CoderPad if
- You hire mostly engineers and want live coding interviews in a shared editor.
- You want every candidate to use the same AI models, set up for you.
- You need enterprise checks they list, such as SOC 2 and GDPR.
Choose Lemonsignal if
- You want candidates in the AI tool they would use in the job, on their own computer or in the browser.
- You want to watch the whole session yourself, and see the moment behind every score.
- You want every score linked to the moment in the conversation it came from.
Hirevue
Other assessment tool
Hirevue runs AI interviews, video interviews and validated assessments for hiring at high volume. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“Hirevue runs AI interviews, video interviews and validated assessments for hiring at high volume. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs Hirevue, checked 14 Oct 2026
| Hirevue | Lemonsignal | |
|---|---|---|
| What candidates do | Voice interviews with an AI interviewer that asks follow-up questions, video interviews on demand or live, and assessments: games, language, coding and Virtual Job Tryout simulations | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | Their site does not say that candidates do the work with an AI tool. It lists AI detection and limits on copy and paste among its cheating checks | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | The AI Interviewer scores each answer against a rubric you approve, and says why. Games and AI-scored video interviews use AI; the Virtual Job Tryout does not. Recruiters make the final decision | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Any role, from high-volume frontline hiring to professional roles, in industries such as healthcare, retail and financial services | Engineering, product, design, marketing, data and finance |
| Watching for cheating | Identity checks, browser focus tracking, limits on copy and paste, AI detection and candidate snapshots | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | Scores in your ATS with the evidence behind them, interview summaries and searchable transcripts. From assessments: scores, fit, strengths and follow-up questions | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose Hirevue if
- You hire at high volume and want every applicant screened, at any hour.
- You want validated assessments, such as games and job simulations, across many roles.
- You need the governance they list, such as fairness audits, EU AI Act alignment and an AI opt-out for candidates.
Choose Lemonsignal if
- You want to see how people do the work with AI, not only hear them describe their skills.
- You want candidates in the AI tool they would use in the job.
- You want to watch the whole session yourself, and see the moment behind every score.
Codility
Other assessment tool
Codility tests engineers in its own VS Code environment, and business roles with short tasks done with its built-in AI Assistant, scored the same way every time. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“Codility tests engineers in its own VS Code environment, and business roles with short tasks done with its built-in AI Assistant, scored the same way every time. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs Codility, checked 28 Oct 2026
| Codility | Lemonsignal | |
|---|---|---|
| What candidates do | Engineering screens and structured interviews in VS Code, with a terminal and multi-file projects. AI for Business: tasks of about 20 to 60 minutes that end in a deliverable, such as a report or an account brief; an assessment can combine several | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | A built-in AI Assistant, next to the brief. For live interviews, the interviewer chooses which AI models candidates can use. You can also turn AI off. Their site does not say whether candidates can use their own tools | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | Business deliverables are scored “deterministically against an expert-defined answer space”, with no generative AI in the grading. Code is analysed automatically for quality and complexity. Their site does not describe a score for how the candidate used AI | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Engineering, and eight business functions: customer support, customer success, sales, product management, product marketing, marketing, data analysis and finance | Engineering, product, design, marketing, data and finance |
| Watching for cheating | Identity verification, impersonation detection and proctoring, with integrity signals given as a risk level for reviewers | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | A record per candidate with the deliverable, the score, integrity signals and the full AI Assistant transcript, plus skills data across your engineering team | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose Codility if
- You hire engineers and business roles at volume, and want short tasks scored the same way every time.
- You want one platform for screening, interviews and mapping your engineering team’s skills.
- You need the checks they list, such as SOC 2, ISO 27001 and WCAG 2.2 AA.
Choose Lemonsignal if
- You want candidates in the AI tool they would use in the job, not a built-in assistant.
- You want to watch the whole session yourself, and see the moment behind every score.
- You want every score linked to the moment in the conversation it came from.
Karat
Other assessment tool
Karat runs live technical interviews for you, with its own Interview Engineers, including AI-native ones in an IDE with a built-in AI assistant. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“Karat runs live technical interviews for you, with its own Interview Engineers, including AI-native ones in an IDE with a built-in AI assistant. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs Karat, checked 28 Oct 2026
| Karat | Lemonsignal | |
|---|---|---|
| What candidates do | Live, one-on-one technical interviews. NextGen interviews are project-based, in a production-grade codebase, and assess how candidates direct, evaluate and refine AI-generated code | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | In NextGen, Karat’s built-in AI assistant in a VS Code-based IDE; their page says external AI tools are prohibited. Their other interviews can allow or not allow ChatGPT, depending on your setup | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | Karat’s Interview Engineers, experienced software engineers it certifies, on structured rubrics | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Engineering. Karat says it supports over 100 technical languages and frameworks | Engineering, product, design, marketing, data and finance |
| Watching for cheating | Interview content they describe as “AI-resistant”, and a live interviewer. Their pages do not describe a detection method | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | Interview results on a rubric, insight into skills such as AI proficiency and technical communication, and benchmarks against other companies by industry, job family and location | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose Karat if
- You hire engineers at volume and want someone else to run the technical interviews.
- You want a live interviewer with every candidate, and benchmarks across companies.
- You want one interview format for engineering teams in many locations.
Choose Lemonsignal if
- You hire outside engineering, too.
- You want candidates in their own AI tool and setup, not a built-in assistant.
- You want candidates to work on their own time, and to see the moment behind every score.
Coderbyte
Other assessment tool
Coderbyte has timed, auto-graded tests, AI phone screens and live coding interviews, with ChatGPT and other models available in its IDE if you allow them. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“Coderbyte has timed, auto-graded tests, AI phone screens and live coding interviews, with ChatGPT and other models available in its IDE if you allow them. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs Coderbyte, checked 28 Oct 2026
| Coderbyte | Lemonsignal | |
|---|---|---|
| What candidates do | Timed, recorded tests from a library of 10,000+ questions, take-home projects, AI phone screens and live coding interviews in VS Code | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | ChatGPT and other models inside Coderbyte’s IDE, for interviews and take-home projects. Challenges can be done with or without AI, as you choose | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | Automated grading against your criteria, with manual grading for some question types, and scorecards for interviews | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Individual contributor roles in technology, go-to-market, operations and support, including software, data science, design, sales and finance | Engineering, product, design, marketing, data and finance |
| Watching for cheating | Webcam proctoring, screen recording, identity checks, tab-leaving and paste detection, plagiarism checks and AI usage detection. Advanced proctoring is a paid add-on | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | Automated grading and reports, performance summaries, cheating reports, code playback and interview scorecards | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose Coderbyte if
- You want a low-cost, self-service plan: their site lists one at $99 a month for 20 invites.
- You want a large library of timed, auto-graded tests.
- You want AI detection on tests where AI is not allowed.
Choose Lemonsignal if
- You want candidates in the AI tool they would use in the job, on their own computer.
- You want to watch the whole session yourself, and see the moment behind every score.
- You want every score linked to the moment in the conversation it came from.
Vervoe
Other assessment tool
Vervoe runs job simulations and skills tests for any role, graded by machine learning that learns from your team’s grading, including tasks built around AI. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“Vervoe runs job simulations and skills tests for any role, graded by machine learning that learns from your team’s grading, including tasks built around AI. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs Vervoe, checked 28 Oct 2026
| Vervoe | Lemonsignal | |
|---|---|---|
| What candidates do | Job simulations, “a sequence of tasks in a realistic work environment”, with answers in spreadsheets, presentations, code, video, text or multiple choice. AI skills tasks include refining AI-generated copy and critiquing an AI-generated analysis | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | Their AI skills page describes tasks around AI, and does not name an AI tool or say whether candidates bring their own. Their integrity checks flag AI-generated answers | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | Machine learning models that “learn from your team’s grading”. AI skills are scored out of 100, each tied to a task | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Professional, volume and early-career roles, in industries such as financial services, healthcare and the public sector | Engineering, product, design, marketing, data and finance |
| Watching for cheating | A government ID matched to a live selfie, continuous identity proctoring, copy-paste and tab-switch checks, and a human review of flagged candidates | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | Report cards with skill scores, strengths and areas to improve, shareable without a login, synced to your ATS | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose Vervoe if
- You hire at volume across many roles and want candidates ranked automatically.
- You want one platform for many kinds of test, with video and spreadsheet answers.
- You want identity checks and fraud reports across channels and agencies.
Choose Lemonsignal if
- You want candidates to do the work in the AI tool they would use in the job.
- You want to see their whole conversation with the AI, not only their answers.
- You want to watch the whole session yourself, and see the moment behind every score.
iMocha
Other assessment tool
iMocha has a library of 10,000+ skills tests and an AI interviewer, and an AI-Readiness Index for measuring AI skills across a company. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“iMocha has a library of 10,000+ skills tests and an AI interviewer, and an AI-Readiness Index for measuring AI skills across a company. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs iMocha, checked 28 Oct 2026
| iMocha | Lemonsignal | |
|---|---|---|
| What candidates do | Coding, logic and English tests, live coding interviews, and interviews “conducted by an AI agent”. For AI skills: AI-assisted coding in a live environment, and a prompt simulator with fixed workplace scenarios | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | Their AI-Readiness page describes coding alongside AI and writing prompts, and does not name the AI tools or models | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | AI-driven scoring for code, English and AI interviews. AI skills are scored against task-specific rubrics; prompts on a 0 to 5 scale over six dimensions | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | 300+ job roles and 10,000+ skills. AI-Readiness covers five personas, from everyday AI users such as recruiters and marketers to engineers and leaders | Engineering, product, design, marketing, data and finance |
| Watching for cheating | AI-based monitoring of webcam, screen and tab switching, with flags for impersonation, face absence and copy-paste | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | Proficiency scores, AI interview transcripts, violation logs, and AI readiness by function, team and location | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose iMocha if
- You want one library for many skills and roles, for hiring and for your current staff.
- You want to measure AI readiness across a whole company, by team and location.
- You want an AI interviewer to screen many applicants.
Choose Lemonsignal if
- You want candidates in the AI tool they would use in the job, on a real task.
- You want to watch the whole session yourself, and see the moment behind every score.
- You want every score linked to the moment in the conversation it came from.
Glider AI
Other assessment tool
Glider AI has skills tests, AI-led video interviews and AI recruiting agents, with an AI Assistant built into its coding tests and interviews. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“Glider AI has skills tests, AI-led video interviews and AI recruiting agents, with an AI Assistant built into its coding tests and interviews. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs Glider AI, checked 28 Oct 2026
| Glider AI | Lemonsignal | |
|---|---|---|
| What candidates do | Technical, behavioural and cognitive tests, coding simulations, live coding interviews, and AI video interviews that run without a live interviewer | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | Glider’s AI Assistant, built into its technical assessments and live coding interviews. Their page does not name the model, and does not say whether candidates can use their own tools | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | Automated grading for tests. Their AI Assistant page says every interaction with it is captured and analysed, and does not say how it is scored or by whom | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Technical roles and 200+ non-technical roles, including hourly and frontline hiring, in industries such as healthcare, finance and manufacturing | Engineering, product, design, marketing, data and finance |
| Watching for cheating | AI proctoring, biometric ID checks, and detection of impersonation and deepfakes | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | Skill reports covering technical skills, collaboration, AI fluency and work readiness; interview summaries and searchable transcripts | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose Glider AI if
- You hire at high volume, including hourly and contingent roles, and want screening to run on its own.
- You want AI agents for sourcing, outreach and phone screens as well as tests.
- You need ID checks and proctoring across every stage.
Choose Lemonsignal if
- You want candidates in the AI tool they would use in the job, not a built-in assistant.
- You want to watch the whole session yourself, and see the moment behind every score.
- You want every score linked to the moment in the conversation it came from.
Woven
Other assessment tool
Woven runs engineering scenarios, such as a code review or a production bug, scored by two certified engineers, and lets candidates bring their own AI model. Lemonsignal gives a real task to roles beyond engineering, records the whole conversation with the AI, and gives your team a first read to check.
- Compared with: Lemonsignal, the product
“Woven runs engineering scenarios, such as a code review or a production bug, scored by two certified engineers, and lets candidates bring their own AI model. Lemonsignal gives a real task to roles beyond engineering, records the whole conversation with the AI, and gives your team a first read to check.” Lemonsignal vs Woven, checked 28 Oct 2026
| Woven | Lemonsignal | |
|---|---|---|
| What candidates do | Short, timeboxed scenarios that simulate engineering work: code review, debugging a production bug, programming and system design. You choose no AI, AI-first, or a mix | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | Their own: “Bring-Your-Own LLM”. Their page names Copilot Agent Mode, Cursor and agentic IDEs as examples for AI-first scenarios | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | People: “double-blind scoring by two certified engineers”. In AI-enabled scenarios, the work is compared with what a top model produces in one go, and scored on what the candidate adds | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Engineering: full-stack, frontend, backend, SRE and DevOps, engineering managers and data science | Engineering, product, design, marketing, data and finance |
| Watching for cheating | AI and plagiarism detection on every assessment, and human-powered async proctoring for no-AI scenarios | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | A strengths and weaknesses report for each candidate; candidates get technical feedback on their work, too | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose Woven if
- You hire only engineers and want two engineers to score every candidate.
- You want short scenarios and a mix of AI-free and AI-first tasks.
- You want candidates to get detailed technical feedback.
Choose Lemonsignal if
- You hire outside engineering, too: product, design, marketing, data or finance.
- You want the whole conversation with the AI recorded, as a session replay.
- You want every score linked to the moment in the conversation it came from.
Canditech
Other assessment tool
Canditech runs job simulations for any role, with Claude, ChatGPT and Codex inside the test, scored by AI agents. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.
- Compared with: Lemonsignal, the product
“Canditech runs job simulations for any role, with Claude, ChatGPT and Codex inside the test, scored by AI agents. Lemonsignal gives candidates a real task in the AI tool they already use, and records how they worked, with a first read for your team to check.” Lemonsignal vs Canditech, checked 28 Oct 2026
| Canditech | Lemonsignal | |
|---|---|---|
| What candidates do | Job simulations that “mimic the actual job”, from a ready-made AI skills library or your own, testing AI knowledge, judgment, prompting, critical thinking and responsible use | A real task from the job, such as a bug to fix or a campaign to plan |
| Which AI tool | Tools such as Claude, ChatGPT and Codex “directly within the assessment”, in a monitored environment. You can also block AI | Their own: Claude Code, Codex, Claude Cowork or ChatGPT, on their own computer or in the browser |
| Who scores | AI auto-scoring by pre-trained agents, or agents you build. Their site does not say whether a person reviews the scores | Lemonsignal gives a first read, against a scoring sheet written before anyone takes the task. Your team watches the session, checks the read and decides |
| Roles | Any role, from engineering and data to marketing, sales, finance, healthcare, hospitality and the trades | Engineering, product, design, marketing, data and finance |
| Watching for cheating | Flags for copy-paste, tab switching, leaving full screen, second screens and IP changes, and optional webcam snapshots | Checks the person doing the task is the person you sent it to, and that the work matches the conversation |
| What you get back | Candidates ranked by performance, reports you can export or sync to 40+ ATSs, and proctoring insights. Their site does not say whether you see the AI conversation | A recommendation, six AI skills and two or three job skills, each linked to the moment in the conversation it came from |
Choose Canditech if
- You want job simulations for many roles, with candidates ranked automatically.
- You want a familiar AI tool inside a monitored test.
- You want to start free and build tests yourself.
Choose Lemonsignal if
- You want candidates in their own AI tool and setup, on a real task from the job.
- You want to watch the whole session yourself and make the call, not leave it to an AI agent.
- You want the whole conversation with the AI, and every score linked to its moment.
Lemonsignal pricing
Offer
Packages from $299, monthly plans from $449, and a free trial on 3 candidates.
| Plan | Candidates | Price | Details |
|---|---|---|---|
| Free trial | 3 candidates | Free | No card needed |
| Package | 20 candidates | $299 | Paid once, used within 12 months |
| Package | 50 candidates | $599 | Paid once, used within 12 months |
| Monthly | 50 candidates a month | $449 a month | Billed monthly |
| Monthly | 100 candidates a month | $799 a month | Billed monthly |
| Monthly | 200 candidates a month | $1,399 a month | Billed monthly |
| Yearly | 50 candidates a month | $4,490 a year | Billed yearly, 2 months free |
| Yearly | 100 candidates a month | $7,990 a year | Billed yearly, 2 months free |
| Yearly | 200 candidates a month | $13,990 a year | Billed yearly, 2 months free |
- Price of: Lemonsignal, the product
“Free trial: try it on 3 candidates for free before buying, no card needed.” Lemonsignal for LLMs
LemonSignal, the Roblox library
Different thing
An unrelated open-source signal library for Roblox (Luau) on GitHub, with the same name.
- Not related to: Lemonsignal
“Not to be confused with LemonSignal, an unrelated open-source signal library for Roblox (Luau) on GitHub.” Lemonsignal for LLMs