Fastino Labs is a research lab based in Palo Alto, California, building small language models and tooling such as Pioneer to inference and fine-tune language models. The company is the creator of Pioneer, a platform that improves the accuracy of language models in production over time, and the GLiNER open-source model family, which has been downloaded more than 30 million times and is used in production by Fortune 500 teams including NVIDIA, Meta, and Airbnb. Fastino Labs has raised $25 million through its seed round and is backed by investors including Khosla Ventures, Insight Partners, and Microsoft M12.