What does Together AI do?

Together AI is an American enterprise software company that specializes in cloud-based infrastructure for open-source generative artificial intelligence (AI). Founded in June 2022 by a team of researchers and entrepreneurs from Stanford University and ETH Zurich, the company aims to democratize access to AI through a decentralized, full-stack platform. Together AI is headquartered in San Francisco, California. The company offers a comprehensive AI platform that supports the entire lifecycle of generative AI development. This includes a decentralized GPU network for running AI models, an extensive library of over 200 open-source models, and tools for model fine-tuning and deployment. Together AI also provides proprietary software stacks that optimize performance and cost efficiency, along with access to the RedPajama-V2 dataset, which is the largest open resource for training large language models. With significant financial backing, including a $305 million Series B round in February 2025, Together AI is positioned as a key player in the AI infrastructure landscape.