AI training data startup Micro1 raises $100M+ at $4B valuation
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Sources report that AI training data startup Micro1 raised over $100 million at a $4 billion valuation, up from $500 million in September 2025. The company, which began last year as a recruiting business with $7 million in annual recurring revenue, now generates over $500 million in ARR, and two xAI cofounders invested in the round.
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Anna Tong / Forbes : Sources: AI training data startup Micro1 raised $100M+ at a $4B valuation, up from $500M in September 2025 — At the beginning of last year, Ali Ansari's company, Micro1, was a recruiting business with $7 million in ARR. It's now generating over $500 million in ARR and two xAI cofounders invested its latest round.
