Market landscapes / Training Data / Expert Data & RL Environments for Frontier Labs
Mercor
Expert networks and benchmarks for AI evaluation. Mercor connects frontier AI labs with domain experts to build evaluation benchmarks, train AI agents, and monetise professional data at scale.
Expert Data & RL Environments for Frontier Labs5,001-10,000 peoplemercor.com ↗
Updated 9 November 2026
Hiring now
From Mercor's own jobs board, checked every week.
Hiring in the UK. Roles are advertised in the UK and the US.
With a recruiter on the list, it is preparing to hire at a faster pace.
It has 109 open roles, up from 56 in mid-July.
Where the roles are
Against its sector
Mercor has more open roles than any other company in Expert Data & RL Environments for Frontier Labs. 17 of the 67 active companies in this sub-sector are advertising roles.
Who Mercor competes with
The other active companies we file under Expert Data & RL Environments for Frontier Labs, sorted by how much they are hiring.
Where this fits
Expert-generated data and reinforcement learning environments, sold almost entirely to the frontier labs. It exists because the labs decided data produced by specialists was worth more than more volume scraped from the open internet.
We track hiring and team changes across all 174 companies in Training Data.
Our talent report for this sector shows how Mercor's team compares with its competitors.
What is in it:
- Every company's team size, side by side, grouped by sub-sector
- Who grew their team over the last year, and by how much
- Who is losing people: attrition for each company, against the sector average
- Who is hiring right now, and how many open roles each has
I am Ben Jackson. I map this market, and I hire the commercial teams inside it: sales, marketing, product and delivery.
If you are building a team at a company like Mercor, want to work at one, or think Mercor is filed in the wrong place, put 20 minutes in my diary.
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