Modal raises $750M Series D at $15.75B valuation, crosses $1B ARR
2026-10-14
AI infrastructure company Modal announced crossing $1B in annualized run rate and a $750M Series D at a $15.75B valuation led by Accel. Since its Series C, usage tripled and the company grew more than 15x year-over-year; its 'Sandboxes' product for agents, background tasks, reinforcement learning, and vibecoding platforms is itself now a roughly $300M run-rate product, with close to 3 billion sandboxes spun up and the ability to scale to a million concurrent.
Significance 4: A $750M round at a $15.75B valuation with disclosed run-rate and usage-growth figures for an AI-agent infrastructure company is a large, quantified capital event in the agent-infra layer.
Implications · machine-drafted, not owner judgment
A $15.75B valuation and 15x YoY growth for agent-sandbox infrastructure shows metered enterprise demand for agent execution environments specifically, distinct from the more speculative compute buildout (Stargate, nuclear, hyperscaler capex) this tracker has flagged as outrunning proven ROI — this is usage-metered revenue (3 billion sandboxes run), not a pre-revenue infrastructure bet.
- Modal's retention/net-revenue-retention figures if disclosed
- Whether a hyperscaler responds with a competing managed-sandbox product
Sources
- curator [AINews] Modal's $1B ARR, $16B Series D makes it NYC's newest AI Infra Decacorn retrieved 2026-10-15