Scale sues Mercor over customer playbook

This lawsuit shows the fight is no longer about who can source more experts, it is about who controls customer relationships and the operating playbook behind them. Mercor and Scale both sell access to scarce human talent for model training, but Scale adds deep customer specific workflows, pricing logic, and quality systems. If those materials move with employees, the moat shifts from marketplace scale to information security and account control.

• Scale is alleging more than employee poaching. The complaint filed on September 3, 2025 in federal court names Mercor and Eugene Ling, and centers on claims that Ling downloaded more than 100 customer strategy and proprietary documents before joining Mercor.
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• The reason this matters is that Scale and Mercor increasingly overlap in the same high value workflow. Scale built a large data labeling business and later launched Expert Match for high skill contractors, while Mercor built its core around AI vetted doctors, lawyers, and PhDs for RLHF and full time recruiting.
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• This is happening as the market gets more concentrated around a small set of frontier labs and enterprise accounts. Mercor reached a $500M annualized revenue run rate by August 2025, while Scale reached $1.5B ARR by end of 2024, so even a single large account can be worth millions and justify hardball legal tactics.
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Going forward, expert data marketplaces will look more like enterprise services firms than open labor platforms. Winning will depend on locked in customer workflows, cleaner compliance, and the ability to prove that talent supply, pricing, and account knowledge were built internally rather than imported from a rival.