Modal raises $750 million Series D — valuation has tripled in five months
Modal announced on October 14, 2026 a $750 million Series D at a post-money valuation of $15.75 billion — 3.4 times its value from May, when the company raised $355 million at $4.65 billion. At the same time, the company says annual recurring revenue (ARR) has passed $1 billion, up from roughly $300 million in May when the Series C closed — a more than threefold increase in five months. The figures are the company's own, relayed through secondary reporting from SiliconANGLE and WOWTALE, and have not been independently verified.
The terms of the round
The round was led by Accel, with Kleiner Perkins joining as a new investor. Six existing investors returned: Menlo Ventures, General Catalyst, Redpoint Ventures, Lux Capital, Amplify Partners and Bain Capital Ventures (WOWTALE). SiliconANGLE describes the raise as a late-stage round and notes that the new valuation is more than triple the level from the previous round in May (SiliconANGLE).
What Modal actually does
Modal is an AI cloud that runs on hardware the company rents from more than 20 cloud providers. If one provider has technical problems, customers' workloads can keep running on the others, according to the company's description as relayed by SiliconANGLE. This resilience architecture is part of the foundation of the service: customers get access to compute capacity across multiple clouds without having to deal with each provider themselves.
The business model rests on a proprietary infrastructure management system — a scheduler — that Modal says can provision tens of thousands of containers per second. It is this provisioning speed that makes it possible to scale short, intensive AI workloads rapidly up and down, which is the core of the offering to customers building AI applications.
Sandboxes: nearly a third of revenue
The Sandboxes product, launched in 2023, has according to Modal grown to $300 million in annualized revenue on its own — nearly a third of the total, according to SiliconANGLE. The company says it has spun up nearly 3 billion sandboxes in total. A recent internal test reportedly showed one million concurrent containers; that figure is unverified and comes from the company's own testing, not from a third party.
Sandboxes are used to run code generated by AI agents in isolated environments. The product's growth from its 2023 launch to a claimed third of the company's revenue illustrates how large a share of the Modal story now rests not on model training, but on the infrastructure around running AI-driven applications.
The capital is earmarked, among other things, for multi-node training
Modal says the new funds will go toward products for multi-node training, reinforcement learning and post-training, further inference improvements, and expanded support for virtual machines in Sandboxes (WOWTALE). That signals that the company, which until now has been largely associated with inference, intends to expand into training workloads.
A market in rapid revaluation
The round is part of a wave of mega-rounds in AI infrastructure. Competitor Baseten has reportedly moved from a $5 billion valuation in January toward a reported, but unconfirmed, $13 billion valuation, and Fireworks AI raised $1.5 billion the month before Modal's round, according to WOWTALE's market description. The AI inference infrastructure segment is thus being revalued in months, not years — and the capital requirements in the segment are correspondingly large.
The company behind the numbers
Modal was founded in 2021 by CEO Erik Bernhardsson, who previously led the music recommendation systems at Spotify and was CTO at Better.com. The company has more than 200 employees across New York, San Francisco and Stockholm.
Open questions
All the key figures — the $1 billion ARR, the Sandboxes revenue and the container numbers — are the company's own claims, relayed via secondary coverage without independent auditing. Baseten's $13 billion is reported, not confirmed. And whether today's inference buildout will remain as capital-intensive — or become profitable — over time remains unresolved.