Together AI Raises $800M Series C at $8.3B Valuation

Together AI, the San Francisco-based neocloud specializing in NVIDIA GPU clusters and AI inference infrastructure, announced an $800 million Series C funding round on July 1, 2026, bringing its post-money valuation to $8.3 billion. The round was led by Aramco Ventures — the venture arm of Saudi Aramco — with participation from NVIDIA, Vista Equity Partners, and other existing investors.

The raise brings Together AI's total funding to approximately $1.3 billion. The company plans to use the capital to dramatically expand its cloud infrastructure footprint, accelerate development of its open-source inference platform, and broaden its product portfolio. Together AI positions itself as the cost-effective alternative to closed-model API providers, offering developers access to open-source models like Llama and Mistral with optimized inference at scale.

The involvement of Aramco Ventures is particularly notable for the MENA region. It signals Saudi Arabia's strategic push to secure AI compute infrastructure through direct equity stakes in leading neocloud providers, rather than relying solely on domestic data center buildouts. This complements the kingdom's broader AI ambitions including the SDAIA-led national strategy and multi-billion-dollar GPU acquisitions.

Together AI competes in the rapidly growing neocloud market alongside players like CoreWeave and Lambda Labs. What differentiates Together is its dual focus on infrastructure and open-source model optimization — the company has contributed significant research to efficient inference techniques including speculative decoding and quantization-aware serving. The funding announcement comes amid a record venture funding environment, with Q1 2026 seeing over $300 billion deployed globally into startups, driven predominantly by AI infrastructure deals.