Mercor
AI-interview talent platform serving AI labs
What is Mercor?
Mercor was founded in San Francisco in 2023 and uses AI interviews to screen applicants. It raised money at a $10 billion valuation in October 2025, mainly on the strength of supplying experts to AI labs for model training and evaluation. Product teams can hire engineers through it, but the platform is built for volume, and Sacra estimates its fee at about 30% of contractor pay. If you want two senior ML engineers for a year-long roadmap, look elsewhere. A firm that employs and manages its people fits that job better.
Mercor works primarily with clients in AI labs, Technology, Finance, Legal, Healthcare sectors. Its primary differentiator is: AI-run interviews and matching built for high-volume expert hiring.
Mercor tech stack and services
| Service area |
|---|
| ML Engineers |
| LLM Engineers |
| Talent Marketplace |
Mercor pricing
Short answer: Mercor uses a contractor rate plus platform fee (about 30%, sacra estimate) pricing approach. Minimum engagement is not publicly disclosed; a discovery call is required.
| Engagement model | Typical range | Best for |
|---|---|---|
| Freelance contract | Variable; depends on team size | Large programmes or team augmentation |
Mercor pros and cons
| Advantages | Things to consider |
|---|---|
| +Fast access to a large pool of specialists | -AI interviews, not engineers, do the first screen |
| +Well funded | -Fee of about 30% adds up over a long engagement |
| +Experienced with AI-lab evaluation and training work | -Founded in 2023, so a short track record with product teams |
Mercor vs alternatives
How Mercor compares to the other top AI Engineer Staffing companies.
| Company | Best for | Key difference | Rating | Compare |
|---|---|---|---|---|
| Tensorway | CTOs who want an engineer, not a recruiter,... | Senior AI engineers run a code review and a specialization-specific task on every candidate | 4.8 | Full comparison |
| deepsense.ai | Teams that need a senior ML researcher who... | A research-heavy bench of about 120 employed AI specialists with ten years of production work | 4.6 | Full comparison |
| Toptal | Engineering leads who need one senior freelance ML... | Multi-stage screening that ends with interviews by senior engineers and a test project | 4.5 | Full comparison |
| Proxify | European companies that want a vetted ML or... | Senior-engineer interviews with live coding after an automated skills test | 4.4 | Full comparison |
| InData Labs | Product teams that need a computer-vision or NLP... | Ten years of computer-vision and NLP delivery in an AI-only company | 4.4 | Full comparison |
| Quantiphi | Enterprises that need many AI roles filled at... | The biggest AI-only bench here, sold through a named staffing program with AWS | 4.3 | Full comparison |
| Neurons Lab | Banks and insurers that need agent or LLM... | A 500-engineer network managed by a small AI-only core team in London | 4.3 | Full comparison |
| Index.dev | Startups that want a 30-day refundable trial before... | A 30-day trial with full refund on every placement | 4.2 | Full comparison |
| Vstorm | Teams whose LLM agent prototype needs engineers who... | A team that works almost entirely on LLM agents and RAG | 4.2 | Full comparison |
| Turing | Companies that need many remote ML and data... | Automated vetting and matching across the largest developer pool on this page | 4.1 | Full comparison |
| Andela | Companies building a long-term remote engineering group outside... | Assessment tooling from its 2026 Woven acquisition plus an in-house AI training academy | 4.1 | Full comparison |
| Uvik Software | Python-heavy teams that want employed senior engineers rather... | A no-freelancer policy with senior Python engineers who average seven years or more | 4.1 | Full comparison |
| SciForce | Healthcare data teams that need NLP or data... | Medical data science experience plus a documented multi-year placement engagement | 4.0 | Full comparison |
| Fusemachines | Cost-conscious companies that want mid-level ML engineers from... | Its own AI education programs feed an employed bench in emerging markets | 4.0 | Full comparison |
| Addepto | Industrial and automotive companies that need data engineers... | Data and ML engineers with industrial and automotive client history | 4.0 | Full comparison |
| Folio3 | Teams that need an MLOps or computer-vision engineer... | Very fast start times with a two-week trial and offshore pricing | 3.9 | Full comparison |
| Azumo | U.S. teams on a tight budget that need... | The lowest published hourly band on this page with full U.S. time-zone overlap | 3.9 | Full comparison |
| BairesDev | U.S. companies that need ML engineers alongside a... | Thousands of Latin American engineers available in U.S. time zones | 3.9 | Full comparison |
| N-iX | Large companies that want ML and data engineers... | Scale and two decades of history in Central European delivery | 3.9 | Full comparison |
| Svitla Systems | Mid-size companies that want one supplier for ML... | Engineers in both Latin American and European time zones from one supplier | 3.9 | Full comparison |
| Data Science UA | Companies that want to hire Ukrainian ML engineers... | A large AI community and conference series that feeds its recruiting | 3.8 | Full comparison |
| Tribe AI | Leadership teams that want a part-time senior ML... | Part-time access to senior ML practitioners from large tech companies | 3.8 | Full comparison |
| Strider | U.S. startups that want to hire a Latin... | Hiring plus retention support for Latin American developers | 3.8 | Full comparison |
| Coderio | U.S. teams that need a managed nearshore squad... | Squads assembled within seven days, with managed delivery as an option | 3.8 | Full comparison |
| Qubit Labs | Cost-conscious teams that can write a precise brief... | Recruiting across several lower-cost Eastern European countries | 3.7 | Full comparison |
| micro1 | AI teams that need many vetted contributors quickly... | Automated AI interviews that screen candidates in high volume | 3.7 | Full comparison |
| Harnham | Companies hiring permanent data or ML staff in... | Twenty years of recruiting only in data and analytics | 3.7 | Full comparison |
| KORE1 | U.S. companies that want a local agency to... | A U.S. staffing agency with contract-to-hire terms for AI roles | 3.6 | Full comparison |
Mercor FAQ
What is Mercor?
AI-interview talent platform serving AI labs
How much does Mercor charge?
Mercor uses contractor rate plus platform fee (about 30%, sacra estimate) pricing. Minimum engagement is not publicly disclosed. A discovery call is required to get project-specific quotes.
What tech stack does Mercor use?
Mercor works with Python, PyTorch, OpenAI, Anthropic, AWS. Primary industries served include AI labs, Technology, Finance, Legal, Healthcare.
Is Mercor right for enterprise?
AI labs and research teams that need specialist contractors in large numbers. 300–400 staff; large contractor network team size. Key consideration: AI interviews, not engineers, do the first screen.
What are the best Mercor alternatives?
The best alternatives to Mercor depend on your use case. Top options are:
- Tensorway: senior ai engineers run a code review and a specialization-specific task on every candidate
- deepsense.ai: a research-heavy bench of about 120 employed ai specialists with ten years of production work
- Toptal: multi-stage screening that ends with interviews by senior engineers and a test project
Compare Mercor with other AI Engineer Staffing companies
Verify all details directly with Mercor before making a decision.