Micro1, a three-year-old startup that helps AI companies find and manage human contractors for data labeling and training, has raised a $35 million Series A funding round that values the company at $500 million. The round was led by O1 Advisors, a venture capital firm co-founded by Dick Costolo and Adam Bain, the former CEO and COO of Twitter.

The startup is one of many companies looking to fill the gap in the data market created by recent changes involving Scale AI. After Meta invested $14 billion in Scale AI and hired its CEO, AI labs including OpenAI and Google said they planned to cut ties with the startup, presumably over concerns that their research could end up in Meta’s hands. (Scale AI denies that it shares confidential information with Meta as part of its partnership).

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