Micro1

AI Training Data · Data Labeling

Milestone

Micro1 reportedly rockets from $100M to $500M run rate in 8 months

Frontier AI labs still pay armies of doctors, lawyers and engineers to catch the mistakes their models can't see.

• Micro1's gross annual revenue run rate jumped from $100 million to $500 million over eight months, according to a person familiar with the company cited by TechCrunch.
• The four-year-old Palo Alto startup, founded by Ali Ansari, supplies AI labs with vetted doctors, lawyers, engineers and scientists who grade, correct and improve model outputs.
• Micro1 began as an AI recruiting platform called Zara before pivoting when a data-labeling client asked it to hire hundreds of engineers for AI training work within two weeks.
• Because Micro1 pays out roughly 30% to 40% of revenue to its contracted experts, its net annual run rate sits between $150 million and $200 million, well below the gross headline figure.
• The company raised a $35 million Series A in September 2025 at a $500 million valuation, backed by 01A and LG Technology Ventures, when it was generating about $50 million in annual revenue.
• Separate reports put Micro1's valuation above $2.5 billion and its annualized revenue as high as $300-400 million, though even by conservative counts it still trails rivals Mercor ($2B gross ARR) and Handshake ($1B).
• The scramble for human-graded training data shows that even frontier AI labs still depend on paid domain experts to catch what models get wrong, a demand that could keep growing alongside compute spending.