How we make this list: we compare pricing pages, product documentation and public user reviews. Rankite is independent; if a vendor ever pays for a featured spot, that listing is clearly labeled Partner.
Key takeaways
- TestGorilla is the best all-round pick for skills-based hiring, with a large test library, AI interviews, and a free plan to start.
- SHL is the enterprise standard for validated psychometric assessment, with decades of science behind its tests.
- Codility and HackerRank are the two serious options for engineering hiring, built around real coding tasks and integrity controls.
- Mercer Mettl leads for high-volume assessment with strong proctoring across 20+ languages.
- Vervoe and Maki represent the newer wave, using AI to grade job simulations and run conversational screening.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 TestGorilla | Skills-based hiring with a large test library | See website | Yes |
 SHL | Enterprise-grade validated psychometric assessment | See website | No |
 Codility | Engineering hiring with real coding tasks | See website | No |
 HackerRank | Developer skills assessment backed by a huge community | See website | No |
 Mercer Mettl | High-volume hiring with serious proctoring | See website | No |
 Vervoe | Job-simulation assessments with AI-powered grading | See website | Free trial |
 Criteria Corp | Flat-fee aptitude and personality testing | See website | Free trial |
 eSkill | Custom hard-skills tests from a huge question bank | See website | No |
 iMocha | Skills intelligence across technical and business roles | See website | No |
 Maki | Conversational AI-driven hiring at enterprise scale | See website | No |
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Starting priceSee website
Free planYes
TestGorilla has become the default recommendation for companies moving to skills-based hiring. The library covers cognitive ability, personality, language, and role-specific skills, and you can combine tests into a single assessment link sent to every applicant. AI video interviews and resume scoring extend it beyond pure testing. Setup is self-serve and takes under an hour, with candidates receiving a simple link that works on any device.
The free plan lets small teams try real assessments before paying, which is rare in this category. Check the pricing page for current plan limits, since candidate volume and feature access vary by tier. The limitation is depth: for senior engineering roles you will still want a specialist like Codility or HackerRank alongside it.
What we like- 350+ ready-made assessments plus AI interviews
- ATS integrations
- Free plan available
Watch out for- Pricing scales with hiring volume
- Less depth for hardcore technical roles
#2
SHL
Best for: Enterprise-grade validated psychometric assessment
Visit shl.com
Starting priceSee website
Free planNo
SHL is the incumbent that defined pre-employment testing. Its assessments are built on published psychometric research and validated across industries, which is why large enterprises and governments trust it for high-stakes hiring. The catalog covers ability, personality, and job-specific simulations at a scale nobody else matches, delivered in dozens of languages.
That credibility comes with enterprise baggage: quote-based pricing, sales-led onboarding, and slower setup than the self-serve tools. Contracts are typically annual and sized by assessment volume. If you need defensible, science-backed assessment at scale, SHL is the benchmark. Smaller teams will find it heavy and should start with TestGorilla or Criteria Corp.
What we like- Decades of validated assessment science
- Enormous test catalog
- Global delivery and support
Watch out for- Enterprise pricing with no public numbers
- Implementation takes longer than self-serve tools
Starting priceSee website
Free planNo
Codility focuses on one job and does it well: evaluating programmers. CodeCheck sends candidates role-specific coding tasks to complete remotely, and CodeLive provides a shared editor with video for live technical interviews. The task library is designed by engineers and the plagiarism detection is taken seriously, which matters when candidates can ask AI tools for help.
It is not a general assessment platform, and it does not try to be. Pricing is quote-based and aimed at companies that hire developers regularly. If you do, the specialization is the point: every feature serves engineering hiring, from the task design to the skills reports. Everyone else should look at the broader tools on this list.
What we like- CodeCheck assessments plus CodeLive interviews
- Strong anti-cheat measures
- Detailed skills reports
Watch out for- Developer roles only
- Premium pricing aimed at tech companies
Starting priceSee website
Free planNo
HackerRank pairs its assessment platform with a developer community in the tens of millions, which feeds a question library few can match. Recent additions include an AI-assisted IDE inside tests and an AI interviewer for follow-up questions, plus integrity signals that flag suspicious behavior. ATS integrations push results straight into your hiring workflow.
Like Codility, it lives in the engineering world. The breadth of languages and roles covered is wider, and the community angle helps with employer branding among developers. Pricing requires a sales conversation and is enterprise-oriented, which puts it out of reach for very small teams. For tech companies hiring at volume, it is one of the two default choices.
What we like- 7,500+ question library across dozens of languages
- AI-assisted IDE for tests
- Plagiarism and proctoring controls
Watch out for- Focused on coding roles
- Pricing is quote-based and enterprise-oriented
#5
Mercer Mettl
Best for: High-volume hiring with serious proctoring
Visit mettl.com
Starting priceSee website
Free planNo
Mercer Mettl is built for scale. Its platform handles everything from campus hiring drives to certification exams, with proctoring that records audio and video, captures screens, and flags suspicious activity. Support for more than 20 languages makes it a fit for global hiring, and the assessment library spans aptitude, personality, coding, and domain skills.
Pricing is quote-only and the buying process is enterprise-style, with contracts sized by volume, so it suits organizations assessing thousands of candidates rather than a startup hiring its fifth employee. For that high-volume job, the proctoring depth is the differentiator. Smaller teams will find the sales process disproportionate to their needs.
What we like- Tens of millions of assessments delivered a year
- AI proctoring with audio, video, and screen monitoring
- 20+ languages
Watch out for- The interface feels dated to some users
- Buying runs through an enterprise sales process
#6
Vervoe
Best for: Job-simulation assessments with AI-powered grading
Visit vervoe.com
Starting priceSee website
Free planFree trial
Vervoe's pitch is that candidates should do the job, not answer trivia about it. Its assessments use realistic tasks, from code challenges to working spreadsheets, and AI grades the responses against your criteria. Report cards break down each candidate by skill, which makes comparisons concrete and gives hiring managers something more useful than a single score.
The template library is smaller than TestGorilla's or SHL's, and you will want to validate the AI grading against your own judgment during onboarding. A free trial lets you run real candidates through it first. For roles where a work sample predicts success, the simulation approach is compelling and candidates tend to find it fairer than abstract tests.
What we like- Immersive question types including working spreadsheets
- 300+ ready templates
- Detailed candidate report cards
Watch out for- Smaller library than the giants
- AI grading needs calibration to your standards
Starting priceSee website
Free planFree trial
Criteria Corp keeps things simple: one platform, one flat fee, and access to all of its assessments, including the widely used Criteria Cognitive Aptitude Test. The 14-day free trial lets you run real candidates through it before committing, which more vendors should offer. Setup is quick and the candidate experience is straightforward.
It is strongest for general hiring, aptitude, personality, and basic skills, and weakest for technical roles. Small and mid-size businesses like the predictable pricing in a category full of quote-only enterprise sales. If you hire across many non-technical roles and want one consistent battery, it is hard to beat on simplicity.
What we like- Simple flat-fee pricing model
- Validated tests including the CCAT
- 14-day free trial to evaluate
Watch out for- Less technical depth than coding specialists
- The interface shows its age
#8
eSkill
Best for: Custom hard-skills tests from a huge question bank
Visit eskill.com
Starting priceSee website
Free planNo
eSkill is the customization specialist. Its library spans hundreds of subjects, and you can mix questions across subjects, set difficulty, and build tests tailored to exact job requirements. Each customer gets an assessment specialist to help design tests and interpret results, which suits teams without in-house testing expertise.
There is no free tier and no public pricing, so it is a considered purchase with a sales-led process. For hard-skills testing where off-the-shelf tests do not fit, the depth of the library and the human support justify the process. Companies with unusual or highly specific skill requirements get the most value here.
What we like- 600+ subjects and tens of thousands of questions
- Deep customization
- Dedicated assessment specialists
Watch out for- No self-serve free plan
- Pricing runs through sales
#9
iMocha
Best for: Skills intelligence across technical and business roles
Visit imocha.io
Starting priceSee website
Free planNo
iMocha positions itself as a skills intelligence platform rather than just a testing tool, covering assessment for hiring plus skills benchmarking for existing employees. Its library is deepest in technology skills, and AI simulators create realistic evaluation scenarios. The SAP SuccessFactors partnership signals where it plays: large enterprises managing talent at scale.
Pricing is enterprise-oriented and quote-based, and smaller companies may find the sales process heavy for their needs. But for workforce-wide skills measurement, combining hiring assessment with internal skills benchmarking in one platform, it is purpose-built and the integrations reflect that ambition.
What we like- Broad skill library for tech and non-tech roles
- AI simulators and interview tools
- SAP SuccessFactors integration
Watch out for- Enterprise-oriented pricing
- Best value for larger organizations
Starting priceSee website
Free planNo
Maki represents where assessment is heading: conversational AI that screens candidates, conducts voice interviews, and runs deep assessments, all feeding one hiring recommendation. It operates in dozens of countries and carries enterprise certifications including ISO 27001, with GDPR readiness for European hiring.
As a newer vendor it lacks the decades-long validation history of SHL, and its sweet spot is high-volume enterprise hiring rather than occasional recruiting. Pricing is quote-based. For talent teams drowning in applications, the automation of screening and assessment is the appeal, and the multilingual support makes it viable for global rollouts.
What we like- Agentic screening, voice interviews, and deep assessment in one system
- 45+ languages
- Strong compliance posture
Watch out for- A newer vendor than the incumbents
- Best suited to high-volume enterprise hiring
Generalist suites vs technical specialists
The fundamental split in this market is between generalist platforms and technical specialists. TestGorilla, SHL, Mercer Mettl, Criteria Corp, eSkill, Vervoe, iMocha, and Maki cover many roles with aptitude, personality, and skills tests. Codility and HackerRank do one thing, evaluating developers, at a depth the generalists cannot match.
Most engineering-led companies end up with both: a generalist for company-wide hiring standards and a specialist for technical roles. Buying only the specialist leaves your non-technical hiring on gut feel; buying only the generalist leaves your engineering bar vague. Budget for the combination if you hire both types of roles.
What to evaluate before you buy
Start with validity, not features. Ask vendors how their tests were validated and for which roles. SHL and Criteria Corp publish this willingly; newer AI-driven tools should at least explain their methodology. A test that does not predict job performance is theater, no matter how polished the interface.
Next, check the candidate experience. Long, clunky assessments cause drop-off, especially for in-demand candidates who have other options. Ask for a demo from the candidate's side, on mobile, before you sign anything.
Then confirm integrations and proctoring. Your assessment tool should push results into your ATS without manual work, and if you hire remotely at volume, proctoring quality matters more than question count. Finally, run a paid pilot with real candidates for one role before rolling out company-wide, and compare the results against your existing hiring outcomes.
We evaluated each platform against vendor pricing pages and documentation, analyst coverage, and public reviews on G2, Capterra, and Reddit. We weighted test library breadth, validation and science, proctoring and integrity features, candidate experience, integrations, and pricing transparency. We did not claim hands-on testing.
Frequently asked questions
What is the best assessment platform for small businesses?
TestGorilla is the easiest starting point, with a free plan and self-serve setup that a small team can run without a sales call. Criteria Corp's flat-fee pricing and 14-day trial also suit smaller teams. Both let you start assessing candidates this week rather than next quarter.
How much do assessment platforms cost?
Most enterprise platforms are quote-based, which frustrates buyers but reflects how much pricing varies with candidate volume. TestGorilla and Criteria Corp publish simpler, more transparent pricing. Expect to pay more as candidate volume, proctoring needs, and integration requirements grow.
Are AI-graded assessments reliable?
They are improving quickly, but treat them as a screening layer, not a final verdict, until you have validated them against your own hiring outcomes. Vervoe and Maki both recommend calibrating AI grading to your standards during onboarding, and that advice is worth following.
Do candidates cheat on online assessments?
Some try, which is why proctoring and plagiarism detection matter. Mercer Mettl, HackerRank, and Codility invest heavily here, with video monitoring and similarity detection. No system is perfect, so combine test scores with structured interviews rather than hiring on scores alone.
What is the difference between aptitude tests and skills tests?
Aptitude tests measure general abilities like reasoning and problem-solving that predict how quickly someone can learn. Skills tests measure what a candidate can already do, like coding in Python or building a spreadsheet. Most strong hiring processes use both, since they predict different things.
Can these platforms integrate with my ATS?
Most established platforms integrate with major applicant tracking systems. TestGorilla, SHL, HackerRank, and Maki all list ATS integrations on their sites. Confirm your specific ATS is supported before buying, since integration depth varies from simple score pass-through to full workflow embedding.
Sources we checked (10)
- https://www.testgorilla.com/
- https://www.shl.com
- https://www.codility.com/
- https://www.hackerrank.com/
- https://mettl.com/
- https://vervoe.com
- https://www.criteriacorp.com
- https://www.eskill.com
- https://www.imocha.io/
- https://www.makipeople.com/
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has spent more than a decade helping SaaS and e-commerce brands grow through search. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.