AI training-data and RL-environment vendor Labelbox closes $100M+ Series E at $1.25B valuation on October 15
San Francisco-based Labelbox announced on October 15 a Series E of over $100 million led by Infinitum Partners at a $1.25 billion pre-money valuation; the company serves more than 400 customers including over 90% of leading U.S. AI labs and reached profitability in 2026.
San Francisco-based training data, reinforcement learning environment and managed-agent platform Labelbox announced on October 15 a Series E of over $100 million led by Infinitum Partners at a $1.25 billion pre-money valuation, combining equity with a credit facility. Labelbox serves more than 400 customers including over 90% of leading U.S. AI labs such as OpenAI, Anthropic, Google DeepMind, Meta and xAI. The company said it turned profitable in 2026 while growing revenue more than fivefold over the past year. The new capital will expand Labelbox Frontier Labs platform multimodal data capabilities, enterprise deployment and Asia Pacific market reach.