Coding Assessment Platform Cost Comparison 2026: 8 Tools Priced

The short answer

There is no single cheapest coding-assessment platform, because they use different pricing models. For very low volume, pay-per-candidate TestDome ($20/candidate, no subscription) wins. For a self-service subscription, CodeSignal Build ($948/yr, 60 credits) is the cheapest real plan, ahead of Codility Starter ($1,200), TestGorilla Core ($1,704) and HackerRank Starter ($1,990). For live coding only, CoderPad from $80/mo is the floor. Every platform reserves high volume for a custom quote. As of June 2026, each price verified against the vendor’s own pricing page.

Every platform, priced side by side.

The entry price and the mid tier are the published self-service bands. Enterprise is custom-quoted on every platform, so the figures below cover the self-service range only. Each row links to the full per-platform cost breakdown.

Platform	Pricing model	Entry price	Mid tier	High tier
CodeSignal	Credit-based	Build $948/yr (60 credits)	Grow $5,748/yr (420 credits)	Pro custom
HackerRank	Attempt-capped subscription	Starter $1,990/yr (120 attempts)	Pro $4,490/yr (300 attempts, unlimited users)	Enterprise custom
Codility	Invite-based	Starter $1,200/yr (120 invites)	Scale ~$5,000/yr (300 invites)	Custom
TestGorilla	Credit-based	Free (10 credits/mo); Core $1,704/yr	Plus $4,800/yr (coding + ATS)	Enterprise custom
Adaface	Credit-based annual	$180/yr (Individual)	Per-candidate $15 down to $4	$50,000/yr (Unlimited)
TestDome	Pay-per-candidate	$20/candidate (5-pack)	$7/candidate (600-pack)	No subscription tier
CoderPad	Interview volume, unlimited users	Starter $80 to $120/mo	Team $400/mo (~$4,800/yr)	Custom
Karat	Outsourced interviews (quote-only)	~$200 to $400 per interview	Volume contracts (lower per-interview)	Enterprise multi-year

Karat is the outlier: it sells outsourced interviewing (a real interviewer conducts and scores the screen), not self-service software, so its per-interview price is not comparable to the per-assessment tools above and it does not publish a rate. See the Karat cost page for that model in full.

Which model fits your hiring volume.

The pricing model matters more than the headline number, because it decides how your bill scales. Match your hiring pattern to the model rather than chasing the lowest sticker.

Sporadic or seasonal hiring

Best fit: TestDome (pay-per-candidate)

If you hire in bursts and run nothing between, a subscription bleeds money during the quiet months. Pay-per-candidate means you pay $20 per candidate when you are hiring and nothing when you are not. Ten candidates a year is about $200, versus $948 to $1,990 for the cheapest annual subscriptions. Adaface's low tier also fits here.

See the cost math →

Steady mid-volume auto-graded screening

Best fit: CodeSignal, HackerRank, Codility

If you run a consistent stream of auto-graded coding assessments, a credit or attempt subscription amortises well. CodeSignal Build ($948/yr) is the cheapest entry, Codility Starter ($1,200) and HackerRank Starter ($1,990) sit above it, and the mid tiers (CodeSignal Grow, HackerRank Pro, Codility Scale) all land at roughly $14 to $17 per unit. Pick on library depth and format, not dollars.

See the cost math →

Live coding interviews, not take-homes

Best fit: CoderPad, CodeInterview

If your process is synchronous live coding rather than auto-graded take-homes, you do not need an assessment library, so per-interview-volume pricing with unlimited users is cheaper. CoderPad Starter runs $80 to $120/mo and CodeInterview from $89/mo, both well below HackerRank Starter for teams that only interview live.

See the cost math →

Broad multi-role skills testing

Best fit: TestGorilla, Adaface

If you test beyond engineering (sales, support, cognitive, personality) as well as coding, a broad credit-based skills platform covers more ground per dollar. TestGorilla Core is $1,704/yr for two seats and its Plus tier ($4,800/yr) adds coding challenges and ATS integration; Adaface runs credit-based from $180/yr with per-candidate pricing of $15 down to $4 at scale.

See the cost math →

The number that actually decides value.

On every platform here the subscription fee is small next to the engineer-time the assessment saves or wastes. An auto-graded assessment cuts roughly 10 to 15 minutes of reviewer time per submission versus manually scoring a coding exercise. At a senior IC loaded rate of about $185 to $220 per hour (see our technical phone interview cost page), that is $30 to $50 of engineer time saved per assessment. Across a few hundred assessments a year that saving dwarfs the $948 to $5,748 platform cost, which is why the right question is which platform’s format and library best fit your roles, not which has the lowest sticker.

Use the comparison table to rule out obvious model mismatches, then decide on fit. To see how a chosen platform’s cost flows into your full cost-per-hire, plug it into the five-component calculator.

Run your own numbers.

Add your chosen platform's cost to the calculator and see the per-hire impact.

Run the calculator

Frequently asked questions

What is the cheapest coding assessment platform in 2026?

It depends on volume, because the platforms use three different pricing models. For very low volume (under about 25 candidates a year), pay-per-candidate TestDome is hard to beat: you pay $20 per candidate on the small pack and nothing when you are not hiring, so 10 candidates costs about $200 with no subscription. For steady self-service volume, CodeSignal Build at $948 a year (60 credits) is the cheapest real subscription, undercutting HackerRank Starter ($1,990), Codility Starter ($1,200) and TestGorilla Core ($1,704). For live-coding interviews only (no auto-graded library), CoderPad Starter at $80 to $120 a month is the floor. There is no single cheapest tool; the cheapest depends on whether you buy by subscription, by credit, or by candidate.

How do the three pricing models differ?

Subscription/seat-and-attempt (HackerRank): a flat annual fee that includes a capped number of candidate attempts, with $20 per extra attempt. Credit-based (CodeSignal, TestGorilla, Adaface): you buy an annual credit allowance and spend credits per assessment or AI-interviewer session, with per-credit overage. Invite-based (Codility): the annual fee includes a fixed number of assessment invites. Pay-per-candidate (TestDome, Adaface at the low end): no subscription, a flat price per candidate that falls with pack size. Karat is different again: it is outsourced interviewing priced per completed interview, not software. The model matters more than the headline price, because it decides how your bill scales as hiring volume moves.

Which coding assessment platform is best value at high volume?

At high volume every platform pushes you toward a custom Enterprise/Pro quote where per-unit pricing falls, so the published self-service tiers stop being the right comparison. Among the published tiers, the per-unit cost converges: HackerRank Pro is about $15 per assessment at its 300-attempt allowance, CodeSignal Grow about $14 per credit at 420 credits, Codility Scale about $17 per invite at 300 invites, and TestDome drops to about $7 per candidate on the 600-pack. Adaface's Unlimited tier at $50,000 a year works out to roughly $4 per candidate at genuine scale. Beyond the published allowances, the negotiated Enterprise rate is what actually decides high-volume value, and that is quote-only across all of them.

Do HackerRank and CodeSignal cost the same?

They have converged but are not identical. CodeSignal Build ($948/yr, 60 credits) undercuts HackerRank Starter ($1,990/yr, 120 attempts) on headline price but carries fewer included units, so HackerRank Starter is often the lower effective cost per assessment. At the mid tier it flips: HackerRank Pro is $4,490/yr (unlimited users, 300 attempts) against CodeSignal Grow $5,748/yr (420 credits), so HackerRank Pro is the cheaper subscription but CodeSignal includes more units. The decision usually turns on feature fit (auto-graded library depth, AI interviewer, fraud prevention) rather than dollars, and both reserve high volume for custom quotes. Full head-to-head math is on the HackerRank vs CodeSignal page.

Which platforms publish real prices and which are quote-only?

Six of the eight publish self-service prices you can read without talking to sales: HackerRank, CodeSignal, Codility, TestGorilla, TestDome and CoderPad (and CodeInterview). Adaface publishes credit-based annual pricing too. Karat does not publish a rate; its $200 to $400 per-interview range is triangulated from procurement and reseller data, not a list price, because it sells outsourced interviewing rather than software. For every published platform, the Enterprise or Pro tier is still custom-quoted, so the published prices cover the self-service band only.

Should I pick a platform on price alone?

No. The platform fee is rarely the largest cost in a technical hiring loop; the engineer-hours the assessment saves or wastes usually dominate. An auto-graded assessment saves roughly 10 to 15 minutes of reviewer time per submission versus manual scoring, which at a senior IC loaded rate of $185 to $220 per hour is $30 to $50 of engineer time per assessment. That saving is larger than the per-assessment platform cost on every tier here once you run real volume, so the right question is which platform's assessment format and library best fit your roles, not which has the lowest sticker. Use the price comparison to rule out obvious mismatches, then decide on fit.