Codility vs TestGorilla_

TestGorilla covers hundreds of roles and starts with a free tier. Codility is built for organisations hiring engineers, where the depth of the technical evaluation is the whole point.

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Codility goes deep on engineering rather than wide across every role. Assessments run as work simulations in a real environment, scoring is fully deterministic and explainable, and more than 1,300 tasks are validated by Assessment Scientists and monitored for adverse impact at measured cut scores. A human stays accountable for the decision, with reviewable AI activity in front of them. Codility does not suit a team that wants a free self-serve tool.

TestGorilla is built for skills-based hiring across every role, with a free tier, a broad test library covering cognitive ability, personality, language and software skills, and published science behind the tests.

How Codility and TestGorilla compare

Capability	Codility	TestGorilla
Scoring	Fully deterministic scoring with full explainability. Criteria are fixed and weighted before release, and every score traces back to them	Automated scoring against published per-test fact sheets, developed with subject matter experts and reviewed for content, construct, face and criterion validity. Adverse impact monitoring at measured cut scores is not published
Task library	More than 1,300 tasks, each validated by Assessment Scientists, calibrated for difficulty and monitored for adverse impact, plus virtually unlimited custom tasks created with AI through Codility’s dedicated task creation MCP, drawing on your own codebase if you choose	More than 350 tests across cognitive ability, personality, language, software, role-specific and programming skills. Custom tests and coding challenges sit above the entry plans
AI in the assessment	Claude Code is available inside Screen, Interview and Skills Intelligence, preconfigured in the VS Code terminal. You enable or disable the AI Assistant per assessment. With it enabled, every interaction is captured as reviewable AI activity. With it disabled, the integrity signals are designed to surface outside help	Conversational and one-way AI video interviews that score candidates against rubrics. Confirm current models and gating with the vendor
AI skills beyond engineering	AI for Business assesses how candidates and employees in business roles work with AI	Broad test coverage well beyond engineering. A dedicated measure of how people in business roles work with AI is not documented
Integrity	ID verification, behavioral monitoring, code evolution replay, secure desktop mode designed to detect invisible AI overlays, copy-paste controls and Similarity Check, plus typing pattern detection and cheating apps detection in Preview. Signals resolve into one deterministic Integrity Risk level that shows which signals contributed, route to a human reviewer and never auto-reject a candidate	Webcam snapshots, full-screen and tab tracking, paste detection, IP location and a three-tier behavior classification. ID verification sits above the entry plans
Live interviews	Codility Interview runs in VS Code with a terminal, sidecar services, a whiteboard, a full transcript and one shared session, and stands on its own if screening is not the gap	Asynchronous video and AI-led video interviews. A live technical interview environment is not documented
Integrations	80+ integrations across applicant tracking systems (ATS), human resources information systems (HRIS) and scheduling tools, with support for single sign-on (SSO) and SAML	Applicant tracking system (ATS) integrations and API access sit above the entry plans
Data hosting	US and EU hosting options available	Hosted on AWS in Ireland, inside the EU

Competitor capabilities change. Details checked against public sources.

Which is the right fit?

Choose Codility if

You need fully deterministic, explainable scoring with a documented methodology behind the decision
You want candidates working with Claude Code, the AI posture set per assessment, and every interaction captured as reviewable AI activity for a human reviewer
You need one evaluation model to run across teams, regions and hiring volumes
You need integrity controls that resolve to reviewable evidence and one deterministic Integrity Risk level: ID verification, behavioral monitoring, code evolution replay, secure desktop mode and copy-paste controls
You want experts in the loop: Assessment Scientists on task design and cut scores, solution engineers on rollout

Choose TestGorilla if

A free tier covers your volume today
You hire across many non-engineering roles and want one library covering cognitive ability, personality, language and software skills
You want the vendor’s AI to score video interviews instead of your own team

What reviewers say on G2

Codility, 901 reviewsTestGorilla, 1,411 reviews

Technical Screening

Codility92% 116 responses

TestGorilla87% 23 responses

Coding Development

Codility89% 102 responses

TestGorilla78% 6 responses

Customization

Codility88% 66 responses

TestGorilla76% 14 responses

Meets Requirements

Codility90% 197 responses

TestGorilla86% 54 responses

Ease of Use

Codility91% 198 responses

TestGorilla88% 54 responses

Likelihood to Recommend

Codility93% 234 responses

TestGorilla88% 76 responses

Has the product been a good partner in doing business?

Narrowest row

Codility93% 76 responses

TestGorilla91% 23 responses

AI Text Generation

Tie

Codility77% 25 responses

TestGorilla77% 14 responses

Source: G2 compare report, Summer 2026

Platform plus people

Enterprise customers work with a named team, not a login page: Assessment Scientists and occupational psychologists on task design, cut scores and adverse impact, solution engineers on the platform, and advisory work on assessment strategy and AI best practices.

Ask each vendor who your team will actually work with after the sale.

Claude Code

Claude Code is available inside Codility Screen, Interview and Skills Intelligence. It is preconfigured in the VS Code terminal and requires no separate Claude account or API key.

Frequently asked questions

Can Codility assess roles outside engineering?

Partly, and it is worth being straight about the boundary. Codility is built for engineering, and AI for Business extends it to how candidates and employees in business roles work with AI. If you need cognitive ability, personality and language testing across every role in the company, TestGorilla covers more ground than Codility does.

Does Codility offer an AI interviewer?

How do Codility and TestGorilla score coding skills?

Both publish something about their science, so compare what each one publishes. Codility scoring is fully deterministic and explainable, criteria are fixed and weighted before a task is released, cut scores are reviewed for adverse impact, and the method is published in a 76-page Technical Manual. TestGorilla publishes per-test fact sheets covering content, construct, face and criterion validity across a general library. Ask each vendor what a reviewer can see when a rejected candidate’s manager asks how the score was reached.

How does Codility know whether a candidate tried to cheat?

Layered signals, and a reviewer who can see all of them in one place. Codility verifies identity with government-issued ID where you enable it, then measures what happens after: code pasted in from outside the environment, a copied task description, time away from the environment, abnormally fast completion, and a code evolution timeline that replays how the solution was built. Similarity Check compares submissions across candidates. Cheating apps detection is designed to surface helper apps that hide themselves from screen capture. When the AI Assistant is enabled, every interaction is captured as reviewable AI activity alongside the transcript.

Those signals resolve into one deterministic Integrity Risk level that shows which signals contributed. Signals route to a human reviewer and never auto-reject a candidate, and a similarity match ends in manual confirmation by design. TestGorilla documents webcam snapshots, full-screen and tab tracking, paste detection, IP location and a three-tier behavior classification, with identity verification above the entry plans. Ask each vendor whether a reviewer can see which individual signals produced that rating, and who is accountable for the decision that follows.

How do we move from TestGorilla to Codility?

See what your engineers can really do

Whether you are hiring your next engineer or understanding the team you already have, the first step is the same. Tell us what you are working on and we will show you how Codility can help you.