Modal Labs Valuation 2026: How the AI Infrastructure Startup Hit $15.75 Billion

Modal Labs raised $750 million at a $15.75 billion valuation in October 2026 — more than 3x its $4.65 billion mark from just five months earlier, backed by annualized revenue that crossed $1 billion.

Modal announced on October 14, 2026 that it closed a Series D led by Accel, with new investor Kleiner Perkins joining and existing investors Menlo Ventures, General Catalyst, Redpoint Ventures, Lux Capital, Amplify Partners and Bain Capital Ventures all participating. The round comes five months after Modal's Series C, and Value Add VC's Pulse coverage tracked the deal as it was confirmed.

Modal Labs Valuation 2026: How the AI Infrastructure Startup Hit $15.75 Billion

Modal Labs' $15.75 billion valuation is the result of a Series D that closed in October 2026, five months after a Series C valued the company at $4.65 billion. What's driving the re-rating is disclosed usage and revenue growth: Modal said usage has tripled since its Series C announcement and that it crossed $1 billion in annualized run rate by its October 14, 2026 announcement, up from roughly $300 million in May 2026 — growth the company describes as more than 15x year-over-year.

Source: Modal company announcement, October 14, 2026.

Modal Labs' Funding History: From $1.1B to $15.75B in a Year

Modal Labs' valuation has climbed in three steps over roughly thirteen months: a round in fall 2025 that valued the company at $1.1 billion, a $355 million Series C in May 2026 at a $4.65 billion valuation, and the $750 million Series D in October 2026 at $15.75 billion. That's roughly a 14x increase in about a year, with the Series C itself pricing in two tranches — the first at $2.5 billion, the second lifted to $4.65 billion on stronger investor demand, Dealroom reported at the time.

What Modal Labs Actually Sells

Modal Labs, founded by CEO Erik Bernhardsson, is a cloud infrastructure platform for building and running AI applications. Its three main products are Inference (serving large language, image, video and audio models), Sandboxes (isolated environments for coding agents, reinforcement learning and untrusted code), and Training (fine-tuning and running models on GPUs that start quickly, across a capacity pool spanning more than 20 clouds). Customers cited in Modal's own announcement include DoorDash, Cognition, Ramp, Runway, Physical Intelligence and TypeSafe AI, whose Jev product reportedly served 1 trillion tokens on Modal's infrastructure in three days.

Source: Modal company announcement, October 14, 2026.

Who Backed Modal Labs' $750 Million Series D?

Accel led the Series D, with new investor Kleiner Perkins joining the cap table. Every prior-round backer returned: Menlo Ventures and General Catalyst (co-leads of the May Series C), plus Redpoint Ventures, Lux Capital, Amplify Partners and Bain Capital Ventures. Full-portfolio participation across three rounds in thirteen months is a notable show of continued conviction, rather than a new set of growth investors stepping in to re-price the company from scratch.

What the headline misses

A $1 billion ARR figure at a $15.75 billion valuation implies roughly a 15.75x multiple on run-rate revenue — notably lower than some 2026 AI-application megarounds that priced closer to 50x ARR, suggesting investors are treating Modal's infrastructure business more like a scaling cloud platform than a speculative application bet. Modal hasn't disclosed gross margin or what the $1 billion run rate looks like after GPU and data-center costs, and "crossed $1 billion" is the company's own phrasing rather than a figure independently verified by a third party. This likely means the business is capital-intensive even as revenue scales, since serving inference and training workloads at this volume requires continuously renewing GPU capacity across more than 20 clouds.

The bet also rests on Modal retaining customers that could, in theory, build similar infrastructure themselves or move to a hyperscaler's native tooling. Modal's named customers — DoorDash, Cognition, Ramp, Runway and Physical Intelligence — are themselves well-funded, and any one of them moving workloads in-house or to a competitor would be a visible test of switching costs that the company's revenue figures don't yet address.

The Bottom Line

Modal Labs' $15.75 billion valuation is backed by disclosed revenue growth that outpaced even its own tripled usage — ARR crossing $1 billion within five months of a $4.65 billion round — at a multiple that looks more disciplined than many 2026 AI-application re-ratings. That doesn't resolve the open questions around margin and GPU cost exposure that come with any infrastructure business scaling this fast, but it does mean Modal's case for $15.75 billion rests on more concrete usage data than headline-only AI valuations typically carry.