Mercor Secures $750M in Series D Funding at $20 Billion Valuation

Mercor, a San Francisco, CA-based AI data company helping organizations train and evaluate AI using human expertise, has raised $750 million in a Series D funding round at a $20 billion valuation.

The round saw backers including Benchmark, Felicis, Fundomo, funds managed by affiliates of Apollo, G Squared, General Catalyst, Glade Brook Capital, NVIDIA, Salesforce, Sapphire Ventures, StepStone Group, XTX Ventures, and Zoom.

The company will use the funding to expand its research, evaluation and post-training infrastructure, including realistic environments where AI agents can learn complex professional workflows.

What is Mercor?

Mercor provides data and infrastructure that help organisations train and evaluate AI systems using real-world professional knowledge.

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The company operates a network of more than five million experts who help AI research labs, technology companies, startups and Fortune 500 businesses assess and improve their models.

It's platform connects AI system's with human expertise across different professional fields. This helps companies evaluate how well AI models perform on real work tasks, and improve their ability to handle complex workflows.

Mercor is also developing training environments that allow AI agents to learn how specific jobs are performed within organisations, including their internal systems, policies and processes.

How Much Funding Has Mercor Raised?

Mercor has raised $750 million in its Series D round at a $20 billion valuation.

The company was founded in 2023, but the announcement did not disclose its total funding raised before this round or provide details of previous investments.

Who Invested in Mercor’s Series D?

The Series D round included participation from:

• Benchmark
• Felicis
• Fundomo
• Funds managed by affiliates of Apollo
• G Squared
• General Catalyst
• Glade Brook Capital
• NVIDIA
• Salesforce
• Sapphire Ventures
• StepStone Group
• XTX Ventures
• Zoom

The company did not identify a lead investor in the announcement.

Why the Funding Matters

Mercor will use the funding to accelerate investment in research, AI evaluation and post-training infrastructure.

A key focus will be developing realistic environments where AI agents can learn complex professional workflows. These environments are designed to help agents understand not only how a job is performed but also how individual businesses operate through their own systems, policies and exceptions.

The investment will also support the development of tools to measure and improve AI performance on real-world business tasks.

Who founded Mercor?

Mercor was founded in 2023 by Brendan Foody. The company is headquartered in San Francisco, California.

“Every company deploying AI needs to know whether it works, and the answer is different for each one,” said Adarsh Hiremath, Co-Founder and Co-CEO of Mercor. “A model can score well on a public benchmark and still fail on the systems, policies, and edge cases that define how a specific business runs.

Market and Business Growth

Mercor has built a network of more than five million experts who contribute professional knowledge to AI training and evaluation.

Its customers include frontier AI research labs, major technology companies, AI startups and Fortune 500 businesses.

The company is expanding its work beyond data collection into AI evaluation and post-training infrastructure. Its APEX benchmark series measures how AI models perform on economically valuable work, while its training environments help agents practise complex tasks using simulated enterprise applications.

What Happens Next?

Mercor plans to expand its research and infrastructure for training and evaluating AI agents.

The company will focus on building more realistic professional work environments, improving AI evaluation and helping agents learn complex business workflows. Its latest investment will support these efforts as organisations increasingly apply AI models to real business operations.

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