AI infrastructure & compute
Together AI
GPU cloud and inference platform built for running and fine-tuning open-weight AI models at scale.
- Founded
- 2021
- Based in
- San Francisco, United States
- Stage
- Growth
- Business model
- Cloud & infrastructure services, API / developer platform, Enterprise contracts
- Record
- VerifiedChecked 24 September 2026
What Together AI does
Together AI was founded in 2021 by Percy Liang (a Stanford AI professor), Chris Ré (a Stanford computer science professor) and Vipul Ved Prakash (who previously sold his startup Topsy to Apple). The company runs GPU cloud infrastructure and an inference platform specifically optimized for open-weight models - Llama, Mistral, DeepSeek and others - positioning itself as the practical alternative to running those models on a hyperscaler's general-purpose cloud.
Together AI's July 2026 Series C, led by Aramco Ventures - the venture arm of Saudi Arabia's state oil company - values the company at $8.3 billion, a 2.5x step-up from its Series B valuation just seventeen months earlier, and reflects the wider trend of sovereign wealth capital moving directly into AI infrastructure companies.
- GPU cloud & compute
- Open-weight models
- Developer APIs & tooling
Runs it
- Percy LiangCo-founder
- Chris RéCo-founder
- Vipul Ved PrakashCo-founder & CEO
Together AI
Growth
Funds it
- Aramco Ventures
- Vista Equity Partners
- General Catalyst
- Nvidia
- Salesforce Ventures
What it builds
Together Inference
Hosted inference API for open-weight AI models.
Together GPU Clusters
Dedicated GPU cloud infrastructure for training and fine-tuning.
Who runs it
Founders
Percy Liang
Co-founder
Professor of Computer Science, Stanford University.
Chris Ré
Co-founder
Professor of Computer Science, Stanford University.
Vipul Ved Prakash
Co-founder & CEO
Previously sold his startup Topsy to Apple in 2013.
Leadership
Vipul Ved Prakash
Chief Executive Officer
Who funds it
- Total raised
- Approximately $1.33 billion
- Valuation, as of Jul 2026
- $8.3 billion
Rounds on record
Series B
$305 million
Led by General Catalyst, Prosperity7
sacra.com/c/together-ai (opens in a new tab)Series C
$800 million
Led by Aramco Ventures
techcrunch.com/2026/07/01/neocloud-together-ai-raises-800m-leaps-to-8-3b-valuation (opens in a new tab)
Investors
- Aramco Ventures
- Vista Equity Partners
- General Catalyst
- Nvidia
- Salesforce Ventures
What it has done
Raises $800 million Series C at $8.3 billion valuation
Together AI closed an $800 million Series C led by Aramco Ventures, a 2.5x step-up from its $3.3 billion valuation seventeen months earlier.
techcrunch.com/2026/07/01/neocloud-together-ai-raises-800m-leaps-to-8-3b-valuation (opens in a new tab)
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