Together AI
Together AI provides cloud infrastructure and software for running, fine-tuning and training open-source AI models.
The Company
Together AI was founded in 2022 by Vipul Ved Prakash, Stanford professor Percy Liang and Ce Zhang. It offers a cloud platform optimized for open-source AI models, letting companies run, fine-tune and train models without building their own GPU clusters.
In July 2026 Together AI raised an $800 million Series C led by Aramco Ventures, with Vista, General Catalyst and Nvidia participating, at an $8.3 billion valuation, up from $3.3 billion in its February 2025 Series B. It reported more than $1.15 billion in annual bookings.
Why It Matters
Together AI is a leading bet on open-source AI models, and a read-through for whether specialist AI clouds can compete with hyperscalers and CoreWeave.
Valuation History
- $3.3B→Feb 2025Series B
- $8.3B→Jul 2026$800M Series C
What Changed
Together AI is founded.
A Series B values it at $3.3B.
An $800M Series C led by Aramco Ventures values it at $8.3B.
THE NEXT COMPANY. A CLEARER PICTURE.
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