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Mercor vs Scale AI vs Surge AI: which pays AI evaluators more
A practical comparison of the three biggest AI-evaluation platforms for developers and domain experts in 2026.
Published
Three platforms dominate paid AI evaluation in 2026: Mercor, Scale AI (mainly through Outlier), and Surge AI. They overlap in client base but differ on rate, task type, vetting bar, and reliability of work supply.
Mercor
Vetted, expert-led, rates typically 60 to 100+ USD/hour for software and technical tracks. Application bar is high; once accepted, the work tends to be deeper and longer-form. Best fit for experienced developers and domain experts who value rate over volume.
Scale AI (Outlier)
Broader, more volume-oriented. Rates are lower on average (15 to 40 USD/hour for most tracks, premium domains higher). Lower entry bar makes it accessible quickly. Best fit if you want immediate volume and steady weekly hours, less concerned with rate.
Surge AI
Positions itself as a quality-focused platform for premium annotation and evaluation. Rates broadly comparable to Mercor for similar skill tiers. Smaller pool of work but consistent for accepted experts.
Direct comparison
| Factor | Mercor | Scale AI | Surge AI |
|---|---|---|---|
| Typical rate (dev) | 60-100+ USD/h | 25-50 USD/h | 35-70 USD/h |
| Acceptance bar | High | Low to medium | Medium to high |
| Volume reliability | Bursty | Steady | Bursty |
| Task depth | Long-form, nuanced | Short, repetitive | Mixed |
| Time to first task | 2-4 weeks | 1-7 days | 2-3 weeks |
How to decide
If your hourly opportunity cost is high and you can absorb bursty volume, Mercor. If you want fast onboarding and steady weekly hours at lower rate, Scale AI/Outlier. If you have a niche specialty (formal verification, advanced math, specific languages), apply to all three and let the highest-paying offers win your time.
Stacking
Many experts run two platforms in parallel. Mercor + Scale fills gaps in volume; Mercor + Surge spreads platform risk. Avoid signing exclusivity clauses if offered.
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Earn $60-$100+/hour evaluating AI model outputs
Mercor matches vetted experts (developers, researchers, domain specialists) with paid evaluation work for frontier AI labs. Async, remote, USD payouts. Best fit if you have technical depth and want flexible high-rate side income.
Apply to Mercor →Frequently asked questions
Which platform pays AI evaluators the most in 2026?
Per hour, Mercor and Surge AI tend to lead for expert and developer tracks, with Mercor typically at 60 to 100+ USD/hour. Scale AI/Outlier pays less on average but offers more sustained volume.
Can I work on Mercor and Scale AI at the same time?
Yes, unless either platform asks for exclusivity for a specific project. Most evaluators stack platforms to smooth income volume.