One company raised $1.3 billion and made $870 million. The other raised nothing and made over a billion.
Key takeaways
- Surge AI, which operated bootstrapped and profitable from its 2021 launch, generated over $1 billion in revenue, surpassing Scale AI's reported $870 million over the same period. Scale had.
- 102 live listings in this category publish a rate, at a median top-of-range of $120 an hour and a ceiling of $220.
- The work is remote contract work, asynchronous, with no set hours and no guaranteed volume.
- Applications screen on a short skills assessment rather than a resume or interview.
What was reported
The finding
Surge AI, which operated bootstrapped and profitable from its 2021 launch, generated over $1 billion in revenue, surpassing Scale AI's reported $870 million over the same period. Scale had raised roughly $1.3 billion in venture funding. Surge began its first capital raise in July 2025, reportedly seeking up to $1 billion.
Surge AI ran profitably from launch without venture money, and passed Scale AI on revenue while doing it. The difference was not marketing. It was that the frontier labs wanted high-quality human feedback and were willing to pay for the operation that delivered it most reliably.
What the listings pay
That matters to you because quality is what the money is chasing. Across 102 live evaluation listings on our board that publish a rate, the median top-of-range is $120 an hour, reaching $220. The listings paying at the top are the ones asking for judgment that is hard to replace.
| # | Role | Advertised rate | Platform |
|---|---|---|---|
| 1 | Structural Biologist (Protein Design, AI Evaluation) | $150 to $220 an hour | Mercor |
| 2 | Multilingual Primary Care Physician (MD): Clinical Documentation & AI Evaluation | $170 to $190 an hour | Mercor |
| 3 | Multilingual Inpatient Hospitalist (MD): Clinical Documentation & AI Evaluation | $170 to $170 an hour | Mercor |
| 4 | MS Excel / Google Sheets Evaluator | $80 to $150 an hour | Mercor |
| 5 | BI dashboards / performance reporting Evaluator | $80 to $120 an hour | Dorado |
| 6 | Visual Annotation Expert | $45 to $120 an hour | Mercor |
| 7 | Senior Hospitalist Clinical Reviewer | $70 to $100 an hour | micro1 |
| 8 | Finance Domain Expert, AI Training & Evaluation | $60 to $100 an hour | Mercor |
| 9 | Clinical & Health Care Operations Reviewer | $75 to $90 an hour | Mercor |
| 10 | CAD Engineer, ScreenSpot Plus (Screenshot Capture & UI Annotation) | $70 to $90 an hour | Mercor |
Source: 102 live listings on this board that publish a rate, read directly from each posting on 2026-09-06. Listings without a published rate are excluded rather than estimated.
How this compares across the board
A rate only means something next to the alternatives. This is every category we track with at least five listings publishing a rate, ranked by median top-of-range, so you can see where this work sits rather than taking a single number on trust.
| Category | Listings | Median low | Median top | Highest |
|---|---|---|---|---|
| Legal | 95 | $100 | $140 | $400 |
| Medical | 68 | $77 | $120 | $400 |
| Consulting | 45 | $80 | $120 | $280 |
| Finance | 94 | $80 | $110 | $280 |
| Engineering | 114 | $70 | $100 | $300 |
| Research/PhD | 132 | $70 | $90 | $280 |
| Writing | 36 | $40 | $80 | $280 |
| Bilingual | 78 | $44 | $52 | $120 |
| Annotation | 25 | $12 | $24 | $120 |
Same source and date as above. Categories are matched on listing title, so a role can appear in more than one.
What it means for you
The strategic read for anyone doing this work: the platforms winning are the ones selling careful expert judgment, not volume. Position yourself accordingly. See what evaluation roles pay and apply to the ones that ask for your actual expertise rather than general availability.
Who should apply
Two checks before you spend time on an application. Confirm the role accepts applicants from your country with the eligibility checker, since a meaningful share of listings carry location requirements. Then run the advertised rate through the take-home calculator, because this is contract work and the headline figure is before self-employment tax.
Applications complete on the hiring platform and usually take a few minutes, with a short skills assessment in place of an interview. Fill in every credential, language and professional background field on your profile. Those are what route you to the better paid listings, and most applicants leave them blank.
Frequently asked questions
What does an AI evaluator earn?
Across 102 live evaluation listings publishing a rate, the median top-of-range is $120 an hour, with the highest at $220.
Why did a bootstrapped company win?
Reporting credits profitability from day one, a concentrated frontier-lab customer base, and focus on delivering quality for those labs rather than scaling headcount.
Does this affect what I get paid?
Indirectly. Demand is concentrated on high-quality expert judgment, which is where the rates are highest. General availability work is where rates are lowest.
Which platform should I join?
Several. There is no exclusivity and the listings differ meaningfully, so applying to only one reduces your options for no benefit.
Is this market stable?
It is growing but concentrated. Most revenue at these firms comes from a small number of frontier labs, so demand tracks their spending closely.
Sources
See every live role
The full board updates several times a week, with the advertised rate on each listing and closed roles removed.