AI data startup Micro1 hits $500M gross run rate in 8 months

Micro1, a four-year-old AI data-labeling startup, has expanded its gross annual run rate from $100 million to $500 million over the past eight months, according to a person familiar with the company. After retaining 60-70% of gross revenue — standard for firms that hire domain experts like doctors, lawyers, and scientists on contract — its net annual run rate sits between $150 million and $200 million. While Micro1 still trails competitors Mercor ($2B gross annualized revenue) and Handshake ($1B), the growth reflects broad market demand supporting multiple players. The startup is increasingly generating synthetic data without human involvement, including automated video content descriptions. Some datasets are sold to multiple customers, pushing gross margins on this 'off-the-shelf' data to 80-90%. Amid controversy over selling shared datasets to Chinese AI developers, founder Ali Ansari stated on X that Micro1 does not sell data to Chinese model makers. Originally launched as an AI recruiting startup, Micro1 pivoted into data labeling after noticing clients using its platform to vet annotation engineers. The company is also building a robotics pre-training dataset by having generalists record everyday object interactions at home. Micro1 raised its Series A at a $500M valuation in September 2025 and may have recently closed an additional round at a significantly higher valuation, per TechCrunch sources.