Refery vs Mercor: Referral Marketplace vs AI Talent Cloud Compared
Refery and Mercor are not direct competitors despite both being recruiting marketplaces. Refery is a referral marketplace for full-time senior engineering and GTM placements at VC-backed startups, charging a 15-20% success fee. Mercor is an AI-matched talent cloud for hourly contractor and trial-to-hire engagements, charging an hourly markup.
This post compares both platforms across what they actually do, when each one is the right fit, and how to choose based on your specific hiring need.
The fast answer: when to pick which
| Use case | Better fit | |---|---| | Full-time senior engineer with equity | Refery | | Hourly contractor or fractional engineer | Mercor | | AI/ML specialist for a 3-month project | Mercor | | Trial-to-hire workflow | Mercor | | Senior GTM AE hire at Series A startup | Refery | | International remote contractor talent | Mercor | | Founding engineer at seed-stage | Refery | | Short-term capacity surge | Mercor |
Side-by-side comparison
| Variable | Refery | Mercor | |---|---|---| | Engagement type | Full-time, salaried, equity | Hourly contractor, trial-to-hire | | Pricing model | 15-20% of base salary (one-time, success fee) | Hourly markup over contractor's rate | | Network composition | 300+ operator-scouts + partner recruiters | AI-matched talent cloud | | Candidate sourcing | Warm referrals from operators | AI screening + matching | | Stage focus | Seed to Series B | All stages | | Role focus | Senior eng + GTM at VC-backed startups | Engineering, AI/ML, design, ops | | Geography | SF and NY primarily for permanent hires | Global (US + international contractors) | | Vetting model | Operator-scouts personally vouch | AI screening + structured interviews | | Best for | Permanent senior hires | Contractor work + trial-to-hire |
How Refery works
Refery is a curated referral marketplace built specifically for permanent senior engineering and GTM hires at VC-backed startups. The 300+ network includes operator-scouts (founders, investors, senior operators) and partner recruiters who personally vouch for candidates.
You post a role. The role is fanned out to relevant referrers in the network. Vetted candidates are submitted with warm-referral context. You interview and hire. Refery charges 15-20% of first-year base salary on success, paid after 90-day retention. The candidate becomes a full-time salaried employee with equity.
Best for: founders hiring permanent senior engineers, staff engineers, principals, EMs, directors, VPs of Engineering, senior AEs, RevOps leads, and heads of sales at seed-to-Series-B startups.
How Mercor works
Mercor operates a different model. It is an AI-matched talent cloud where candidates apply, get vetted through AI screening and structured interviews, and become available for hourly contractor engagements. Companies hire from the cloud on an hourly contract basis, often with the option to convert to full-time.
The pricing model is hourly: Mercor takes a markup over the contractor's hourly rate, which the company pays for the duration of the engagement. There is no one-time placement fee; the cost compounds over the engagement length.
Best for: founders who need hourly contractors, AI/ML specialists for project work, trial-to-hire workflows where they want to test fit before converting, or international remote contractor talent.
When to use Refery
| Hiring need | Why Refery is the right fit | |---|---| | Founding engineer at seed-stage | Warm-referral signal critical; permanent hire with equity needed | | Senior IC engineer at Series A | 15-20% fee on permanent hire; one-time cost | | Staff or Principal engineer | Network depth among senior IC referrers | | Engineering Manager or Director | Operator-scout network includes leaders | | VP of Engineering | Curated network for executive engineering hires | | Senior GTM AE or RevOps | Warm-referral channel for permanent GTM | | Head of Sales or CRO | Network of operators who track senior GTM talent |
The unifying thread: permanent senior hires at VC-backed startups where warm-referral signal matters more than throughput.
When to use Mercor
| Hiring need | Why Mercor is the right fit | |---|---| | Fractional CTO or VP Engineering | Hourly engagement before full-time decision | | AI/ML researcher for a 6-month project | Project work, not permanent role | | Contract software engineer for capacity surge | Short-term need, hourly billing | | Trial-to-hire engineer before converting | Test fit before equity commitment | | International remote contractor (Europe, LatAm, Asia) | Mercor's global talent cloud | | Design or content work on a project basis | Hourly model fits the engagement structure |
The unifying thread: hourly or project-based engagement, often with optionality to convert to full-time later.
Cost comparison: an apples-to-oranges problem
Direct cost comparison between Refery and Mercor is structurally hard because the engagement types differ.
Permanent hire scenario: Hiring a senior engineer at $350K base full-time through Refery costs $52.5K-$70K (15-20% one-time success fee). The engineer is then on payroll at $350K + benefits + equity ongoing.
Contractor scenario: Engaging a senior engineer through Mercor at $200/hour (typical rate for senior IC) with a 30-50% markup costs roughly $260-$300/hour. At 40 hours/week for 12 months, that is $540K-$624K total. The contractor is not on payroll, has no equity, and the engagement ends when the contract ends.
The math diverges based on engagement length. Mercor's hourly model wins for short engagements (under 6 months) where avoiding payroll complexity is valuable. Refery's permanent placement wins for long-term hires (12+ months) where payroll efficiency and equity alignment matter.
Candidate quality: different vetting models
Refery's vetting is operator-vouch-driven: a referrer in the network personally introduces the candidate and stakes their reputation on the placement. This produces 78% interview-to-offer rates and high candidate-vintage signal.
Mercor's vetting is AI-screening-driven: candidates are evaluated through structured technical screens, behavioral interviews, and AI-assisted evaluation. This produces consistent baseline quality across a much larger candidate pool, with breadth as the strength.
Both models work for their respective use cases. Permanent senior hires benefit from warm-referral signal. Contractor and trial-to-hire engagements benefit from broader screening at scale.
What founders actually do in 2026
Refery's data on portfolio startup hiring patterns shows most founders use both platforms for different roles:
- Permanent senior eng/GTM hires: 62% use a referral marketplace (Refery primary)
- Hourly AI/ML or research engineering: 41% use a talent cloud (Mercor primary)
- Fractional executive engagements: 28% use a talent cloud, 18% use traditional retained
- Trial-to-hire workflows: 36% use Mercor or similar, then convert through a marketplace
The platforms complement rather than substitute.
The bottom line
Refery and Mercor solve different hiring problems with structurally different models. Refery is the better choice for permanent senior engineering and GTM hires at VC-backed startups where warm-referral signal matters and you want a one-time success fee. Mercor is the better choice for hourly contractor work, AI/ML projects, trial-to-hire, and international remote talent.
Most founders use both: Refery for the permanent senior bench, Mercor for contractor capacity and AI/ML project work.
Refery places senior engineers and GTM leaders at VC-backed startups (seed to Series B) through 300+ operator-scouts and partner recruiters. 15-20% success fee, no retainer, 38-day median time-to-fill.