Together AI

Together AI operates a cloud platform that makes it easy and affordable to run, fine-tune, and train open-source AI models. The company provides API access to hundreds of open models including Llama, Mistral, and Stable Diffusion, along with tools for custom model training and fine-tuning at scale.

Founded by a team of leading AI researchers including former academics from Stanford and other top institutions, Together AI has focused on making open-source AI competitive with proprietary models. The company's inference engine delivers high throughput at lower costs than running models on generic cloud infrastructure.

Together AI has also contributed to major open-source AI research, including co-developing the RedPajama dataset and collaborating on open model benchmarking. The company positions itself as the infrastructure layer for organizations that want to use open-weight models without building their own GPU clusters.