Codility Reviews & Product Details

Codility is a technical assessment platform built on documented assessment science. It helps engineering and talent teams evaluate technical skills for hiring and map verified capabilities across existing workforces. Every assessment is designed by occupational psychologists, validated against an Engineering Skills Model drawn from 30+ international frameworks, and monitored for adverse impact at every measured cut score. AI has changed how engineering teams deliver. Organizations need signal on who can build in this environment, backed by methodology that holds up when questioned. Codility provides that signal across three workflows: screening candidates with validated technical assessments, running structured live technical interviews, and verifying skills across internal engineering teams. For screening, Codility provides a task library of 1,200+ validated assessments covering real-world work simulations, algorithmic challenges, SQL, and project-based tasks across 80+ languages and frameworks including Python, Java, JavaScript, TypeScript, C#, Go, Rust, Kotlin, React, Angular, Vue.js, Spring Boot, Django, Terraform, Kubernetes, and TensorFlow. Scoring is automated on supported task types with detailed candidate comparison, configurable time limits, and role-specific weighting. Assessments are reviewed by occupational psychologists and follow documented methodology with auditable scoring. For live technical interviews, the platform provides a shared VS Code environment with terminal access, sidecar services for databases, caching, and message queues, a collaborative whiteboard, and full session transcript and recording. Engineering teams evaluate candidates in a real development environment. Talent teams get a repeatable process with rubric scores and session playback after every interview. Organizations control how AI is handled in every assessment. Teams set their AI posture role by role: provide candidates with a monitored AI assistant and review how they prompt, evaluate, and debug with AI, or restrict AI access to evaluate core technical skills independently. Both approaches use the same set of controls and produce a reviewable record of all AI activity. One platform supports AI collaboration assessment and unassisted evaluation with full auditability. Integrity controls are layered to support defensible hiring decisions. These include identity verification, behavioral signals, risk scoring, similarity detection, paste volume measurement, and automated follow-up questions designed to verify understanding. Follow-up questions are deliberately not scored, to avoid introducing bias. When AI is enabled, reviewable AI activity helps teams distinguish between a candidate's own work and AI-assisted output. All signals produce a defensible record for human review. Skills Intelligence provides verified technical skills visibility for existing engineering teams. Organizations use it to identify capability gaps, benchmark skills across teams, and support workforce planning with assessed data rather than self-reporting. Hiring assessment and internal skills verification share the same validated methodology, giving organizations one assessment science foundation across the full talent lifecycle. Codility is SOC 2 audited, ISO 27001 certified, GDPR and CCPA compliant, WCAG 2.1 AA accessible, and aligned with EU AI Act requirements for high-risk AI classification. Assessments follow documented methodology structured to APA Standards, with a 76-page Technical Manual, adverse impact data at every cut score, and an explicit posture: no AI or ML is used in automated hiring decisions. Data is hosted in either EU or US regions. The platform integrates with 20+ applicant tracking and scheduling systems (ATS) including Greenhouse, Workday, SAP SuccessFactors, iCIMS, SmartRecruiters, Lever, Eightfold, and Ashby, with 80+ HRIS integrations for Skills Intelligence. It supports SSO via SAML 2.0 and offers API access for custom workflows. Founded in 2009, Codility is used by engineering and talent teams at Barclays, BMW, Deutsche Bank, GitHub, Samsung, SpaceX, and other organizations evaluating technical skills across both AI-assisted and traditional engineering workflows.

Product Website

Seller

Codility Ltd

Discussions

Codility Community

Languages Supported

German, English, French, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Chinese (Simplified)

Overview by

Lindsey Ludwick (Denver GMT-7)

Value at a Glance

Averages based on real user reviews.

Time to Implement

2 months

View More Pricing Information

Codility Integrations

(19)

Verified by Codility

Codility Media

Codility Demo - Candidate Results Dashboard

See how candidates performed across technical tasks, with scoring breakdown, integrity risk bands, and side-by-side comparison to support defensible hiring decisions.

Codility Demo - Live Technical Interview Environment

Conduct structured technical interviews in a shared VS Code environment, complete with terminal, sidecar services, and whiteboard in one view.

Codility Demo - Assessment Builder and Task Library

Build role-specific assessments from a library of 1,200+ validated tasks. Filter by skill, difficulty, and role to match real engineering work.

Codility Demo - Integrity Controls and Risk Scoring

Review candidate integrity signals in one place: risk scoring, behavioral monitoring, paste volume, and reviewable evidence for every submission.

Codility Demo - Team Skills Coverage and Proficiency

See verified skill distribution across an engineering organization and its individual teams, with proficiency levels, coverage, and experts identified across languages, technologies, and skills.

Codility Demo - AI Posture Control by Assessment

Set AI posture per assessment: enable, restrict, or monitor AI tool use. Reviewable AI activity logs give hiring teams the context to evaluate each candidate fairly.

Official Downloads

(2)

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Aditya C.

Sr. Human Resources Business Partner

Mid-Market (51-1000 emp.)

4/26/2026

Guest users or non-business users of the software, not included in G2 scores.

"Clean, Intuitive Platform for Fair and Efficient Technical Assessments"

4.5/5

What do you like best about Codility?

I used Codility for an online assessment and had a smooth overall experience. The interface is clean and intuitive, which made it easy to navigate and helped me stay focused on solving the problems. The coding environment supports multiple languages and gives instant feedback as you work. The questions felt relevant and were well structured. Overall, it seems like a reliable platform for running fair and efficient technical evaluations for candidates. Review collected by and hosted on G2.com.

What do you dislike about Codility?

Nothing in particular stood out—everything worked as expected and was described correctly. Review collected by and hosted on G2.com.

What problems is Codility solving and how is that benefiting you?

Codility addresses the challenge of running fair and efficient technical assessments. It makes it easier to evaluate coding skills objectively with automated tests and real-time feedback. For me, it offered a clear, structured environment where I could demonstrate my problem-solving abilities without bias. Review collected by and hosted on G2.com.

Arun Kumar Jain K.

Vice President

Mid-Market (51-1000 emp.)

5/31/2024

Guest users or non-business users of the software, not included in G2 scores.

"One of the best online coding assessment for interviews"

5/5

What do you like best about Codility?

The tech stack integration is a good addition for framework related interviews. Real world engineering tasks are a good addition in the era of AI. The IDE has become better with respect to UX Review collected by and hosted on G2.com.

What do you dislike about Codility?

Like every other platform, the frustration when most of the test cases passes but not all, and as a user you are clueless - good to share the test case input for the failed cases. Review collected by and hosted on G2.com.

Adarsh T.

Software Engineer II

Small-Business (50 or fewer emp.)

4/19/2026

Guest users or non-business users of the software, not included in G2 scores.

"Fair, Efficient Technical Assessments with Clear Real-Time Feedback"

5/5

What do you like best about Codility?

Codility addresses the challenge of running fair and efficient technical assessments. It helps evaluate coding skills more objectively through automated tests and real-time feedback. For me, it offered a clear, structured environment where I could demonstrate my problem-solving abilities without bias. Review collected by and hosted on G2.com.

What do you dislike about Codility?

Nothing in particular stands out to mention. Everything is good, and my overall experience was positive. Review collected by and hosted on G2.com.

What problems is Codility solving and how is that benefiting you?

I used Codility for an online assessment and had a smooth experience overall. The interface is clean and easy to navigate, which helped me stay focused on solving the problems. The coding environment supports multiple languages and gives instant feedback as you work. The questions felt relevant and well structured. In general, it’s a reliable platform for fair and efficient technical evaluations from a candidate’s perspective. Review collected by and hosted on G2.com.

Priyank S.

Senior Data Scientist

Computer Software

Enterprise (> 1000 emp.)

7/19/2024

"Very good platform for testing Data Science and DSA skills and getting skills insights"

4.5/5

What do you like best about Codility?

Candidates can practice some lessons provided on the website to warm up and get familiar with the platform. Companies can use this platform to get insights about their talent pool and plan for upskilling the employees. Review collected by and hosted on G2.com.

What do you dislike about Codility?

Codility can collaborate with partners to provide better content on DSA, AI, Database, etc., on their platform, which is frequently asked in interviews, so that candidates have everything in one place. Review collected by and hosted on G2.com.

Aniket .

IT Analyst

Small-Business (50 or fewer emp.)

4/5/2026

Guest users or non-business users of the software, not included in G2 scores.

"Excellent Real-World Coding Tasks for Filtering Technical Talent"

4.5/5

What do you like best about Codility?

Codility does a great job of filtering technical talent with real-world coding tasks that emphasize functional correctness rather than abstract puzzles. Review collected by and hosted on G2.com.

What do you dislike about Codility?

Codility’s rigid automation can end up unfairly penalizing practical engineers, because it prioritizes extreme algorithmic efficiency and obscure edge cases instead of clean, maintainable code. Review collected by and hosted on G2.com.

What problems is Codility solving and how is that benefiting you?

Codility addresses the challenge of high-volume, potentially biased technical screening by offering automated, standardized assessments. For me, this is valuable because it provides high-quality, well-structured coding data that helps me better understand, communicate, and explain complex engineering logic. Review collected by and hosted on G2.com.

Ravi G.

Mid-Market (51-1000 emp.)

3/22/2026

"Empowers Interview Assessments with Needed AI Safeguards"

4/5

What do you like best about Codility?

I like how Codility allows candidates to write code, compile, and show results in real time, which helps me assess the knowledge depth of candidates effectively. Additionally, I found the initial setup to be easy, which was a big plus. Review collected by and hosted on G2.com.

What do you dislike about Codility?

I'm not sure if candidates are using AI on another screen to come up with answers, and I'm not sure if Codility can prevent it. Codility could implement controls to prevent interviewees from copying, pasting, or moving out of the window during an interview, or lock down the ability to move to other tasks until the interview is over. Review collected by and hosted on G2.com.

Response from Christopher Greco of Codility

edit

Hi, thank you for the thoughtful review. I'm glad the real-time coding and compilation experience is helping you assess candidates effectively.

The concern you raised is exactly the kind of thing we've been focused on. In November 2025, we launched Live Proctoring Signals in Codility Interview in Public Preview. Interviewers now receive real-time notifications whenever a candidate switches browser tabs, loses browser focus, attempts to copy the task description, or pastes code from an external source. These events are captured in a live integrity timeline throughout the session, giving you a clear picture of candidate behavior as the interview unfolds.

So while we can't fully lock down a candidate's machine (they're on their own device, after all), you now have immediate visibility into the exact behaviors you described, like moving out of the window or pasting in code from elsewhere. That awareness puts you in a much stronger position to probe further or adjust the conversation in the moment.

If for some reason you don't seem to have these features available to you, please reach out to our support team or directly to me at g2@codility.com. We'll be happy to help.

Christopher Greco

Head of Product Marketing, Codility

See how Codility improved

Mounika p.

Software Engineer

Enterprise (> 1000 emp.)

4/2/2026

"Codility Makes Practicing Data Structures Easy and Effective"

4.5/5

What do you like best about Codility?

Codility helped to incrementally improve my DSA knowledge. Whenever I study about a new Data Structure, I have questions available to query my understanding each time. I love how easy it is to login and start preparing. Customer support helped me a lot when SSO was not working on my machine Review collected by and hosted on G2.com.

What do you dislike about Codility?

I am not able to find the dark mode and my eyes are paining. :( Review collected by and hosted on G2.com.

Yashwin T.

Software Development Engineer

Mid-Market (51-1000 emp.)

4/13/2026

Guest users or non-business users of the software, not included in G2 scores.

"Smooth Codility Assessment Experience with an Intuitive, Efficient Interface"

5/5

What do you like best about Codility?

Codility has a very simple, intuitive UI, which made it much easier for me to navigate between different questions. On other platforms in the same field, I often find this part quite difficult. That’s one of the things I liked most about Codility. Review collected by and hosted on G2.com.

What do you dislike about Codility?

Everything was perfect, and I didn’t face any issues during my assessment. Review collected by and hosted on G2.com.

What problems is Codility solving and how is that benefiting you?

Codility solves the challenge of conducting fair and efficient technical assessments. It helps evaluate coding skills objectively through automated testing and real-time feedback. For me, it provided a structured environment to demonstrate my problem-solving abilities without bias. This made the assessment process transparent, quick, and focused on actual skills rather than manual evaluation. Review collected by and hosted on G2.com.

Ulhaas D.

Software Developer

Mid-Market (51-1000 emp.)

4/2/2026

"Easy Learning and Practice for DSA Prep"

4.5/5

What do you like best about Codility?

I like how easy it is to learn a new concept and then solve questions about to same. This especially helped me while I was preparing DSA for my assessment tests. I liked how customer support helped me solve issues with SSO Review collected by and hosted on G2.com.

What do you dislike about Codility?

I can't find any details on dark mode and the page loads really slow on my office laptop. Review collected by and hosted on G2.com.

Verified User in Information Technology and Services

Enterprise (> 1000 emp.)

3/25/2026

"Easy, Incremental Learning That Makes Progress Feel Natural"

4.5/5

What do you like best about Codility?

The ease of usage with incremental learning is really good. I like the fact that I could learn a new thing about a data structure, solve a question on it and then have incremental progress on the same. The customer support had really helped me when I was trying to solve an issue with access while giving an exam. Review collected by and hosted on G2.com.

What do you dislike about Codility?

I can't seem to figure out how to switch on the Dark Mode and it pains my eyes :( Review collected by and hosted on G2.com.