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AI infrastructure & compute · San Francisco, United States
Together AI is one of the clearest bets that open-weight models need their own specialized infrastructure layer rather than running on general-purpose cloud, and its Aramco-led round shows sovereign capital moving directly into the compute layer of AI rather than only into model companies.
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.
Together Inference
Hosted inference API for open-weight AI models.
Together GPU Clusters
Dedicated GPU cloud infrastructure for training and fine-tuning.
Abu Dhabi's AI and cloud computing group, the parent company behind Core42, Presight and a portfolio of AI businesses spanning healthcare, energy and sovereign infrastructure.
G42's sovereign cloud and AI infrastructure company, building national-scale compute for governments and enterprises in the UAE, the US and beyond.
