Together AI raises $800M Series C at $8.3B, backed by Aramco and 500 MW of independent compute commitments
Together AI, the open-source AI infrastructure platform, closed an $800 million Series C at $8.3 billion post-money valuation on July 1, 2026, more than doubling its valuation from $3.3 billion a year ago. Aramco Ventures led the round, with participation from Vista Equity Partners, General Catalyst, Emergence Capital, NVIDIA, Pegatron, and others. Annual bookings crossed $1.15 billion last quarter; the company serves thousands of paying customers including Cursor, Cognition, Decagon, and Eleven Labs.
Notably, Together AI secured commitments for over 500 megawatts of independently capitalized compute capacity, with a strategy to expand infrastructure footprint roughly 50-fold over five years. The round reflects investor confidence in open-source model economics as production infrastructure, not as a cost hack. Together's full-stack platform—models (DeepSeek, Nemotron, MiniMax, Kimi), kernels, compilers, inference systems—enables customers to reduce inference costs 6x–20x versus closed-system providers like OpenAI and Anthropic.
For practitioners: this is a major validation that enterprise is moving inference workloads to open models at scale. The $500 MW compute commitment de-risks capacity scaling and allows Together to absorb demand spikes without direct capex. At $8.3B post-money on $1.15B bookings, the company is being valued on inference TAM expansion and open-model market share capture. Watch whether 500 MW can absorb bookings growth; if it fills too quickly, the $800M will be stretched and the valuation thesis tested.
Sources
- Primary source
- Together AI raises $800M, leaps to $8.3B valuation
“Together AI — an AI neocloud that rents out Nvidia GPU clusters and other AI-specific infrastructure — has raised an $800 million Series C at an $8.3 billion valuation”
- Together AI Raises $800M to Scale Open Models
“Together AI announced $800 million Series C at $8.3 billion post-money valuation. CEO Vipul Ved Prakash said the company secured commitments for over 500 megawatts of compute capacity”
- Together AI Raises $800M in Series C at $8.3 Billion Valuation
“The company intends to use the funds to expand its products and features and to scale its capacity and infrastructure footprint, which the company expects to grow roughly 50-fold over the next five years”