Mercor vs Scale AI

Mercor and Scale AI both land on Depends.

Mercor

mercor.com

Analyzed October 8, 2026

Depends

Confidence: Medium

Buy if you're an AI lab that needs vetted domain experts and can absorb security and legal risk; workers get strong hourly rates but report deductions and dry spells.

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Scale AI

scale.com

Analyzed September 24, 2026

Depends

Confidence: Medium

Buy only if you're an AI lab, government, or Fortune 500 team needing labeled data and model evals at serious scale.

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Mercor versus Scale AI
Compare	Mercor	Scale AI
Verdict	Depends	Depends
Best for	AI labs needing scarce domain experts	Frontier AI labs
Who it's not for	Teams handling sensitive data mid-lawsuit . breach and worker suits are active	Startups and small teams . severe overkill
Privacy	Confirmed 2026 breach (~4TB) via LiteLLM attack; Meta paused work; worker lawsuits filed.^⁴	Red flag: 2025 Business Insider reporting found sensitive client data exposed in public Google Docs; Scale locked files down after disclosure.¹⁵
Support quality	Recurring deduction and payment complaints	No credible buyer-side support evidence found
Public sentiment	Workers praise the pay and flexibility but report deductions, slashed rates, and uneven project availability.^⁹	Enterprise-platform reviews are scarce and positive but tiny in number; most public feedback is mixed and comes from gig workers and employees.
Biggest gotcha	Workers report hours deducted from paychecks after projects	Quote-based pricing with reported hidden costs; expect sales negotiation before any real number

Pick Mercor when

AI labs needing scarce domain experts
Doctors, lawyers, consultants wanting AI-training side income
Buyers of high-value, low-volume expert work

When Mercor is not a fit

Teams handling sensitive data mid-lawsuit . breach and worker suits are active
Buyers wanting published, predictable pricing . enterprise rates are opaque
Workers needing steady full-time income . project gaps reported
Small teams needing simple hiring . this is enterprise-scale AI data supply

Pick Scale AI when

Frontier AI labs
Government agencies
Fortune 500 AI teams
Model evaluation programs

When Scale AI is not a fit

Startups and small teams . severe overkill
Anyone needing transparent, published pricing
Teams without dedicated ML budget and staff
Buyers with strict data-security demands given the 2025 leak

Sources

Mercor quintuples valuation to $10B with $350M Series Ctechcrunch.com
news
Mercor targets $10B valuation as OpenAI, Meta, Tesla turn to its expertsbenzinga.com
news
How AI labs use Mercor to get the data companies won't providefinance.yahoo.com
news
Mercor says it is one of thousands of companies hit by the LiteLLM attackneowin.net
security
Workers Sue $10B AI Startup Mercor Over Alleged Data Exposuretechloy.com
security
Mercor 4TB data breach discussionreddit.com
security
Mercor Contractors Allege The AI Company Slashed Their Payreddit.com
review
AI Consultant Jobs . Earn $50-180/hrmercor.com
official
Trustpilot reviews of Mercortrustpilot.com
review
Mercor Reviews on Glassdoorglassdoor.com
review
Mercor Pricing blueprintusagepricing.com
official
Scale AI homepagescale.com
official
Scale AI . Wikipediaen.wikipedia.org
news
Meta is paying $14.3B to buy 49% of Scale (Reddit)reddit.com
news
Scale AI's Public Google Docs Reveal Security Holes (Business Insider)businessinsider.com
security
The $14B Security Gap: Scale AI Incident (DoControl)docontrol.io
security