Head-to-head · Assessment & Examination software
Aon Assessment Solutions vs Mercer | Mettl
Aon Assessment Solutions leads on 0 checks, Mercer | Mettl on 0, and 1 is even. Who comes out ahead on the 1 yes/no, price and count check where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreAon Assessment Solutions · 9.3/10
Aon Assessment Solutions scores higher on our rubric for assessment & examination software: 9.3 against 8.8 out of 10; our editors rank them #1 and #4.
Aon Assessment Solutions is the better fit for employers needing broad, enterprise hiring assessments. Mercer | Mettl is the better fit for mid-market and enterprise hiring teams.
- Aon Assessment Solutions fits best
Employers needing broad, enterprise hiring assessments
- Mercer | Mettl fits best
Mid-market and enterprise hiring teams
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Side by side
| Feature | Aon Assessment Solutions 9.3/10 Visit ↗ | Mercer | Mettl 8.8/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 9.3 | 8.8 |
| Ranking | #1 in Assessment & Examination software | #4 in Assessment & Examination software |
| Best for | Employers needing broad, enterprise hiring assessments | Mid-market and enterprise hiring teams |
| Pricing model | Paid | Paid |
| Starting price | Pricing on request | Pricing on request |
| Free plan | Not checked yet | Not checked yet |
| Free trial | — | — |
| Deployment | Cloud, Mobile | Cloud |
| Platforms | Web, iOS, Android | Web |
| Support | Email, Phone, Docs · 24/7 | |
| Integrations | 80+ integrations | 20 integrations |
| Built for | Small business, Mid-market, Enterprise | Mid-market, Enterprise |
| Features Aon Assessment Solutions 1/4 · Mercer | Mettl 1/4 | ||
| Question bank | Not checked yet | Not checked yet |
| Proctoring | ✓ | ✓ |
| Automated grading | Not checked yet | Not checked yet |
| Assessment reporting | Not checked yet | Not checked yet |
| Specs | ||
| Question types | Not checked yet | Not checked yet |
| Exam delivery | Not checked yet | Not checked yet |
| Our review | ||
| Pros |
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| Cons |
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| Our verdict | Aon Assessment Solutions provides online assessments for hiring, selection, promotion, development, and workforce planning. Employers can combine ability and skills tests with cognitive, behavioral, personality, job-fit, coding,… Read the review → |
Mercer | Mettl is a cloud-based assessment platform for employers, education providers and other organizations. For mid-market and enterprise hiring teams, it brings technical, coding, cognitive, personality, behavioral, communication and… Read the review → |
Strengths and trade-offs
Aon Assessment Solutions — where it wins
- Covers cognitive, skills, behavioral, personality, and job-fit assessments
- Offers coding challenges, job simulations, video interviews, and assessment centers
- Includes advanced reporting, benchmarking, remote proctoring, and 80 integrations
Where it doesn't
- Pricing requires contacting sales rather than reviewing standard listed plans
- Support is listed through email, with no other channel specified
- Its broad suite may exceed the needs of employers seeking one narrow test type
Mercer | Mettl — where it wins
- Covers technical, cognitive, personality, behavioral and communication assessments
- Combines AI-assisted and human-based proctoring with browser lockdown
- Connects with ATS and LMS platforms through integrations, REST APIs and webhooks
Where it doesn't
- Pricing is customized and requires contacting sales
- Its breadth may be more than teams seeking a narrow assessment tool need
- Cloud deployment may not suit teams requiring another deployment model
- Aon Assessment Solutions9.3/10 · Pricing on request
A broad assessment suite for employers hiring, developing, and planning workforce talent.
Visit AonFull verdict → - Mercer | Mettl8.8/10 · Pricing on request
A broad assessment suite for hiring teams that need custom tests, proctoring and reporting.
Visit Mercer | MettlFull verdict →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update







