Together AI announced an $800 million Series C on July 1, valuing the "neocloud" inference and training provider at $8.3 billion post-money. The round was led by Aramco Ventures, with participation from Vista Equity Partners, General Catalyst, Emergence Capital, Nvidia, March Capital, Pegatron, and SentinelOne's S Ventures, among others.

What Together AI does

Together AI rents out Nvidia GPU clusters and other AI-specific infrastructure, and runs a platform for training, fine-tuning, and serving open-weight models such as Llama, DeepSeek, and Qwen variants. Rather than building its own frontier model, the company's pitch is that businesses can get comparable performance to closed models like GPT or Claude at a fraction of the cost by running open-weight models on its optimized inference stack. The company says customers report cost savings of 6x to 60x versus closed-model pricing for equal or better performance on many tasks.

Growth behind the round

Together AI said its annual bookings crossed $1.15 billion last quarter, and that open-source model usage across the industry has roughly tripled over the past twelve months. Alongside the equity raise, the company said it has secured commitments for more than 500 megawatts of additional compute capacity, to be financed separately from the equity round, to support expected growth in demand over the next several years.

CEO Vipul Ved Prakash framed the raise around a bet on open ecosystems over closed-model concentration: "Intelligence is becoming a foundational resource for the modern economy, every bit as essential as electricity, bandwidth or capital. Our mission is to ensure that intelligence is abundant, not expensive." He added that "the future of AI won't be owned by a few companies. It will be built by millions of developers and businesses, and open-source models are making that possible."

Where it fits in the market

The round lands as AI infrastructure spending continues to concentrate around a small number of well-capitalized "neocloud" providers that specialize in GPU capacity and inference rather than foundation models themselves. Together AI's new valuation puts it in the same tier of infrastructure-focused raises as other 2026 mega-rounds, and the participation of Nvidia and Aramco Ventures underscores how chip makers and sovereign-linked capital are increasingly backing the compute layer that both open- and closed-model providers depend on. Together AI has not ruled out an IPO as early as next year, according to people familiar with the company's plans.