Modal Raises $750 Million at a $15.75 Billion Valuation as AI Agents Drive Demand
Modal, a startup that sells cloud infrastructure for AI workloads, has raised $750 million at a $15.75 billion post-money valuation. In its announcement, the company says Accel led the Series D round, Kleiner Perkins joined, and all existing investors took part.
SiliconANGLE notes that the valuation is more than triple what Modal was worth after its May round. The company also says it has crossed $1 billion in annualized run rate.
The Numbers Behind the Round
Modal says usage has tripled since its Series C, announced five months ago, and that it has grown more than 15 times year over year. Existing investors in the round include Menlo Ventures, General Catalyst, Redpoint, Lux Capital, Amplify Partners and Bain Capital Ventures.
One caution applies. Annualized run rate is a company-reported figure that scales up current revenue. It is not audited revenue, so treat it as a strong signal rather than a final number.
What Modal Actually Sells
Modal runs code for AI developers. Its first product, Functions, lets developers write code and have Modal run it. The company has since added training, inference and a product called Sandboxes.
Sandboxes is the standout. Modal launched it in 2023, and says it is now a $300 million run-rate product on its own. SiliconANGLE describes it as nearly a third of the company’s revenue. Modal says it has started close to 3 billion sandboxes, and that the system can scale to a million running at once.
Behind the scenes, Modal says it built its own file system, container runtime, scheduler and networking. Its capacity pool now spans more than 20 cloud providers.
Why AI Agents Need Sandboxes
A sandbox is an isolated environment where code can run without touching anything else. That matters because AI models now write code, and that code has to run somewhere safe. Modal says use cases include background agents, reinforcement learning and vibe coding platforms.
SiliconANGLE reports on a related feature called Secret Injection. It lets an agent use login credentials without ever seeing them, which limits the damage if an agent misbehaves or is attacked.
That theme runs through recent AI news. For a cautionary example, read our report on the AI model that escaped a sandbox and hacked Hugging Face.
Who Uses Modal
Modal names a wide set of customers in its announcement. They include DoorDash, Cognition, Ramp, Linear and Hebbia for agents, Runway for video generation, and Physical Intelligence, Generalist AI and 1X for robot training.
The spread matters. It suggests demand is coming from many kinds of AI work, not one hot application.
What the Deal Signals
This section is our own analysis, not reporting.
Investors are still paying heavily for the infrastructure behind AI, not just the apps on top. A valuation that triples in about five months assumes growth keeps compounding, and that is a demanding bet. Vibe coding tools and agent platforms need places to run code, which is why companies like this benefit when apps such as Lovable take off. For the developer side of that shift, see our explainer on vibe coding and AI-first programming.
What to Watch Next
Modal plans to spend part of the new money on product development, including services for reinforcement learning and post-training. Watch whether those launches land, and whether run-rate growth holds as the base gets bigger.
Also watch the competition. SiliconANGLE notes that Modal competes in the inference market, where deploying models is a crowded field. For the financing climate around AI infrastructure, see our report on Nvidia’s AI financing push.
