Together AI raised $800 million in a Series C round at an $8.3 billion valuation, announced on July 1, 2026 and led by Aramco Ventures. The round more than doubled the company's valuation in roughly 16 months and cemented its position as one of the best-funded independent AI infrastructure companies in the market.
Here's the full breakdown of the raise, who backed it, and what it signals about where AI money is flowing in 2026.
What is Together AI?
Together AI is an AI "neocloud" — a cloud provider built specifically for AI workloads rather than general-purpose computing. Founded in 2022, the company rents out Nvidia GPU clusters and specialized infrastructure for training and, increasingly, running inference on open-source and open-weight models.
Its pitch is straightforward: as more of the industry's real workloads shift to open models, companies want to run them somewhere cheaper and more flexible than the closed, proprietary platforms. Together AI positions itself as that layer — the place to serve open-source AI at scale without paying closed-model margins.
The raise: $800M Series C
The headline numbers:
- Amount: $800 million
- Round: Series C
- Valuation: $8.3 billion (post-money)
- Announced: July 1, 2026
- Lead investor: Aramco Ventures
For context, Together AI's previous round — a $305 million Series B at a $3.3 billion valuation — closed only about 16 months earlier. Going from $3.3B to $8.3B in that span is a 2.5x jump, which tells you how aggressively investors are re-rating AI infrastructure as demand compounds.
Who invested in Together AI?
The Series C was led by Aramco Ventures, the venture arm of the Saudi energy giant — itself a signal of how deeply energy and capital-heavy players are moving into AI compute. Participants included:
- Vista Equity Partners
- General Catalyst
- Nvidia (a strategic backer whose chips power the platform)
- Emergence Capital
- March Capital
- Salesforce Ventures and SE Ventures (Schneider Electric)
- S Ventures (SentinelOne) and Pegatron
The mix — sovereign energy capital, strategic chipmakers, enterprise software funds, and hardware manufacturers — is a snapshot of who now wants exposure to the AI compute build-out.
What Together AI will do with the money
Together AI said it will use the funding to expand its inference products and to dramatically scale its infrastructure footprint — which it expects to grow roughly 50-fold over the next five years. Separately, the company secured commitments for more than 500 megawatts of compute capacity to be built independently by its investors to support that growth.
That 500MW figure is the tell. The bottleneck for AI infrastructure in 2026 isn't demand — it's power and physical capacity. Locking in half a gigawatt of committed compute is arguably as important as the $800M itself.
On traction, Together AI has pointed to annual bookings of more than $1.15 billion as of its most recent quarter — a number that helps explain why investors were willing to underwrite such a steep valuation step-up. (Bookings are contracted future revenue, not profit, so it's a demand signal rather than a profitability one.)
Why it matters
Together AI's round is a clean read on three trends shaping AI funding right now:
- Open-source inference is a real business. The company's thesis — that serving open-weight models is a large, growing market — is being validated by both revenue and investor appetite.
- Compute is the new oil. A sovereign energy fund leading the round, plus 500MW of committed power, shows that the AI infrastructure story has become an energy-and-capacity story.
- The independents are consolidating capital. Rather than every workload defaulting to the hyperscalers, well-funded neoclouds like Together AI are raising enough to compete on scale.
For anyone tracking where AI funding is concentrating in 2026, Together AI is a marker: the money is moving downstream, into the picks-and-shovels layer that everything else runs on.
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