Mercor

Mercor connects domain experts with AI labs to train models and provides evaluation tools for enterprise AI deployment.

Mercor is a hr & future of work company based in San Francisco, US, founded in 2023. It has raised $750 million in disclosed funding. Its latest round was a Series D of $750 million in November 2026.

Overview

Founded in 2023, Mercor operates a platform that connects a network of domain experts with artificial intelligence laboratories to support model training [1]. The company recruits and vets professionals across over 300 fields, paying them to complete tasks that improve AI systems [1]. Its primary product, the APEX benchmark index, measures how effectively AI models perform professional-grade tasks [1]. In addition to model training, the company provides "Mercor Enterprise," a suite that enables organizations to deploy custom AI agents trained on proprietary data, workflows, and standards [1]. Mercor has raised $750 million in venture funding, with its most recent financing round reaching the Series C stage [registry]. By providing a structured interface between human intelligence and machine learning systems, the company aims to address development bottlenecks [1]. Through its platform, enterprises can partner with the company to encode institutional knowledge into AI systems or staff teams with vetted professionals [1]. The platform is designed to handle tasks ranging from software engineering to legal document review [0].

AI trainingbenchmarkingAI agentshuman-in-the-loopdomain expertiseenterprise AI