Together AI has raised an $800 million Series C at an $8.3 billion post-money valuation, led by Aramco Ventures, the venture capital arm of Saudi Arabia's state oil company. The round, announced July 1, 2026, more than doubles the San Francisco company's valuation from the $3.3 billion it commanded at its Series B roughly sixteen months earlier, and lands as enterprise adoption of open-source models triples year over year.
Key Highlights
- $800 million Series C at an $8.3 billion post-money valuation, a 2.5x jump from the prior round
- Led by Aramco Ventures, with NVIDIA, Vista Equity Partners, General Catalyst, and Emergence Capital participating
- Total capital raised now stands at roughly $1.3 billion
- Annualized bookings exceed $1.15 billion, according to the company's most recent quarter
- Together AI plans to scale its infrastructure footprint roughly 50-fold over the next five years
Details
Together AI operates as a "neocloud" — a GPU infrastructure and inference provider built specifically for AI workloads rather than general-purpose computing. Its platform hosts and serves open-weight models, letting companies run inference at scale without paying frontier-lab API prices.
The customer roster reflects where that demand is concentrated. Coding-agent companies Cursor and Cognition both run on Together's infrastructure, as does customer-service AI startup Decagon. The company reports thousands of paying customers overall.
The economics are the pitch. Together AI says customers report cost savings ranging from 6x to 60x versus closed-model pricing for equivalent or better performance on their workloads. Decagon specifically achieved a sixfold reduction in inference expenses after migrating.
Beyond the lead investor, the round drew an unusually broad syndicate: NVIDIA, Vista Equity Partners, General Catalyst, Emergence Capital, March Capital, Pegatron, Salesforce Ventures, Schneider Electric's SE Ventures, and SentinelOne's S Ventures.
Impact
The round is a bet that inference — not training — is where the durable business sits, and that a meaningful share of it will run on open weights rather than proprietary APIs.
That bet has data behind it. Open-source model adoption tripled over the preceding twelve months as companies hunted for alternatives to premium closed-model pricing. Together AI's $1.15 billion in annualized bookings puts it in the revenue tier of established enterprise software businesses, not speculative infrastructure startups.
For the MENA region, the identity of the lead investor matters as much as the round size. Aramco Ventures backing the largest independent open-source inference platform signals that Gulf capital is moving past data-center real estate and into the software layer that determines how AI is actually served.
"Together has built the platform that makes open source models genuinely usable at enterprise scale," said Abhishek Shukla, Managing Director at Aramco Ventures.
Background
Founded by CEO Vipul Ved Prakash, Stanford professor Percy Liang, and CTO Ce Zhang, Together AI raised $102.5 million in its 2023 Series A and $305 million in its early-2025 Series B at a $3.3 billion valuation.
The company's positioning has stayed consistent across those rounds. "Intelligence is becoming a foundational resource for the modern economy, every bit as essential as electricity, bandwidth or capital," Prakash said. "Our mission is to ensure that intelligence is abundant, not expensive."
He framed the open-versus-closed question in historical terms: "History shows that the biggest technology shifts are won by open ecosystems that make innovation cheaper, faster and available to everyone. The future of AI won't be owned by a few companies. It will be built by millions of developers and businesses."
What's Next
Together AI says the capital will fund product expansion across its inference platform and a roughly 50-fold increase in compute capacity over five years — an aggressive buildout in a market where GPU supply remains the binding constraint.
The competitive field is filling in fast. Upscale AI reached a $2 billion valuation on $500 million raised, TensorWave closed a $350 million Series B at $1.55 billion, and AI gateway OpenRouter now carries a $1.3 billion valuation. Each is wagering on a different slice of the same thesis: that the inference layer, not the model layer, is where AI infrastructure spending ultimately concentrates.
Source: TechCrunch