Codility tests engineers. Its tasks run the candidate's code, Scale lets you build custom tasks from your own codebase, and its integrity checks look for pasted code and copied task text, with detection of retyped AI code in preview. TunnelQuiz is an AI-powered assessment platform whose proctored tests take multiple-choice, written and coding questions, and it doesn't run code yet. The two meet at one point: the shortlist. TunnelQuiz is the cheaper way to cut a large applicant pool down before Codility's per-invite pricing starts to bite.
Codility's tasks are graded by running the candidate's code, Scale lets you build custom tasks from your own codebase, and its Custom plan adds video proctoring, ID verification and a desktop app, in preview, that flags apps hidden from screen capture. TunnelQuiz grades coding answers with AI on Pro and does not run them; running code against test cases is coming soon. For senior engineering roles, Codility is the right tool.
Codility's Starter plan is $1,200 a year, annual billing only, for up to 120 invites and one platform user. Scale is $6,000 a year for 300 invites, used at most 25 a month. TunnelQuiz has a free plan with 50 credits a month, and Essential is $34 a month billed yearly for 150 credits a month, or month to month if you'd rather not commit.
Codility's pricing FAQ says free trials run through its team rather than as a self-serve signup, scoped to your roles and volume on a call. TunnelQuiz has no sales step: create an account, write or import the questions, set the proctoring and share the link.
Every row below is a capability one or both platforms publish. A dash means we found no public statement that the platform offers it.
| Feature | TunnelQuiz | Codility |
|---|---|---|
| Questions and tests6 | ||
| Multiple-choice questions | Yes. Every plan, with negative marking | Yes. Pre-built multiple-choice tasks |
| Aptitude, language and domain tests | Yes. Your own questions, any subject | Partly, with conditions. Business task library on Custom only |
| Coding questions | Partly, with conditions. 19 languages, AI-graded on Pro; running code against test cases is coming soon | Yes. Code runs and is scored; SQL tasks too |
| Task or question library | No. You write or import your own | Yes. Limited on Starter, larger on Scale, complete on Custom |
| Custom tasks from your codebase | No. | Yes. Built through MCP, Scale and up |
| AI interviews | Yes. Text chat interviews, Pro plan | Partly, with conditions. AI follow-up questions on submitted code, in preview |
| Proctoring and test integrity10 | ||
| Captures of the candidate's screen | Yes. Whole screen every 60 seconds, every plan | Partly, with conditions. Screen snapshots and recording are Premium |
| Webcam monitoring | Yes. Snapshots every 60 seconds, Essential and up | Yes. Candidate snapshots on Starter and Scale; video on Custom |
| Tab and focus loss | Yes. Logged with time away, every plan | Yes. Time away from the IDE flagged |
| Copy and paste | Yes. Blocked and logged | Yes. Pasted code and copied task text flagged |
| Plagiarism in code | No. | Yes. Cross-candidate similarity check |
| AI-assistant browser extensions | Yes. Known AI extensions flagged, Essential and up | Partly, with conditions. Desktop App for hidden cheating tools, in preview, Custom plan |
| Second display | Yes. Detected in Chrome and Edge, every plan | Not stated. |
| Photo ID verification | No. | Partly, with conditions. Government ID check on Custom |
| Live view of candidates mid-test | Yes. Live monitoring from Essential, Live Follow on Pro | Not stated. Signals surface live in Interview, not in Screen |
| Summary of the flags | Yes. Risk score; optional auto-terminate from Essential | Yes. Integrity Risk: None, Low, Moderate or High; a person makes the call |
| Team and integrations4 | ||
| Users | 5 seats on Essential, 20 on Pro, unlimited on Business | 1 on Starter, 3 on Scale; unlimited reviewers on every plan |
| ATS integrations | No. | Partly, with conditions. Greenhouse, Lever, Ashby, Workday and SAP on Custom |
| API | No. Webhooks on Business | Partly, with conditions. Full API on Custom |
| Single sign-on | Partly, with conditions. Google and Microsoft sign-in | Partly, with conditions. SSO and SAML on Custom |
| Pricing and access4 | ||
| Way to start without paying | Yes. Free plan, 50 credits every month | Partly, with conditions. Free trial arranged with Codility's team |
| Entry price | $34/mo billed yearly, 150 credits a month | Starter: $1,200 a year, annual only, 120 invites a year |
| Monthly billing | Yes. Essential and Pro | Partly, with conditions. Scale only; Starter is annual |
| Pricing model | Flat plans: Free $0, Essential $34/mo and Pro $87/mo, both billed yearly (12% off monthly), Business quoted - 50/150/250 credits a month; unproctored tests free on paid plans, AI generation, grading and chat interviews metered separately in AI credits; in India, ₹1,319 and ₹3,519 plus GST | Invite credits: Starter $1,200/yr, Scale $6,000/yr (two months free on annual), Custom quoted |
Codility's Scale plan caps use at 25 invites a month. Run the wide first round on TunnelQuiz, where a credit is one candidate sitting, and you can save those invites for the candidates who reach the coding round.
How many candidates a month
300 a year, at most 25 in any month
Every month, one credit per candidate sitting
Codility's integrity signals are built around code: paste events, code evolution, similarity. TunnelQuiz watches the test session for any question type. It captures the whole screen every minute, logs every tab switch with time away, flags a second display, and from Essential takes webcam snapshots and flags AI browser extensions.
What the integrity checks watch
Paste events, code evolution and similarity between candidates
Whole-screen captures, tab switches, a second display, AI extensions
Codility's Starter plan has one platform user who can build tests, with unlimited reviewers alongside. TunnelQuiz's Essential plan has 5 seats and Pro has 20, and every seat can write questions and set up tests.
People who can build tests on the entry plan
Plus reviewers who can't configure tests
20 on Pro, unlimited on Business
For screening that isn't code, yes: aptitude, fundamentals, language and domain knowledge, asked as multiple-choice or written questions under proctoring. For the coding assessment itself, not yet. Codility runs and scores code, and TunnelQuiz grades coding answers with AI without running them.
As of October 2026, Codility's pricing page lists Starter at $1,200 a year, annual billing only, with up to 120 invite credits a year and one platform user, and Scale at $6,000 a year with up to 300 invites (at most 25 a month) and three platform users. Scale can also be paid monthly, and Codility says annual billing gives two months free. Custom plans are quoted. Free trials are arranged through Codility's team.
As of October 2026, TunnelQuiz has four plans: Free ($0, 50 credits a month that lapse at month end), Essential ($34 a month billed yearly, 150 credits a month, 5 seats), Pro ($87 a month billed yearly, 250 credits and 10 AI credits a month, 20 seats) and Business (quoted). Monthly billing is also available. Prices are in US dollars with no tax added. In India the same plans are ₹1,319 and ₹3,519 a month billed yearly, plus 18% GST.
On its Starter and Scale plans Codility lists proctoring with candidate snapshots. Periodic webcam and screen snapshots, full webcam, screen and audio recording, and government ID verification are Premium features of its Custom plan. TunnelQuiz captures the whole screen every minute on every plan, with webcam snapshots from Essential.
Codility. Its tasks run real code, its library is built for engineering roles, and its integrity checks are built around code: paste events, code history and similarity between candidates. TunnelQuiz is useful earlier in the funnel, to filter a large pool on aptitude and fundamentals before you spend Codility invites.
Start free with 50 credits a month and whole-screen capture on every test.