Together AI has raised $305 million in its Series B funding round.

Self-described as an AI acceleration cloud, Together AI's funding round was led by General Catalyst, and co-led by Prosperity7, with the company valued at $3.3bn.

Other participants included Salesforce Ventures, DAMAC Capital, Nvidia, Kleiner Perkins, March Capital, Emergence Capital, Lux Capital, SE Ventures, Greycroft, Coatue, Definition, Cadenza Ventures, Long Journey Ventures, Brave Capital, Scott Banister, SK Telecom, and technology pioneer John Chambers.

The company aims to use the investment to further its goal of being the "preferred AI cloud" for training with open source and custom models using its upcoming deployment of Nvidia Blackwell GPUs.

According to the company, it already counts the likes of Salesforce, Zoom, SK Telecom, Hedra, Cognition, Zomato, Krea, Cartesia, and The Washington Post among its customers.

Together AI is expanding its AI infrastructure. The company said that it has secured 200MW of power capacity, and is deploying "optimized clusters of Nvidia Blackwell GPUs across multiple North American data centers."

Together AI announced a partnership with Hypertec in November 2024 to co-build a cluster of 36,000 Nvidia GB200 NVL72 GPUs, and launched in February 2025 Together GPU Clusters powered by Nvidia Blackwell GPUs. The company also provides access to the H200, H100, and A100 GPUs, all of which are interconnected with InfiniBand and NVLink. Together AI says it can scale from 16 to more than 100,000 GPUs.

In the Hypertec Cloud announcement, Together AI said that it was "partnering with independent cloud providers like Hypertec, and deploying our inference stack on hyperscalers like AWS, aggregating and accelerating a massive network of global GPU compute."

Together AI was founded in 2022. In February 2024, it raised $100 million with a valuation of more than $1 billion.