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Daytona raised a $60M Series B led by FirstMark at a $1B valuation, as AI labs and developers buy sandboxed cloud environments to run autonomous agents.
Key Takeaways
- Daytona closed a $60M Series B on October 20, 2026, led by FirstMark at a $1B valuation.
- Total funding reaches $91M, eight months after a $24M Series A in February 2026.
- The company says its revenue run rate grew 25-fold between January and September 2026.
Lead
Daytona, a startup that sells isolated cloud computers for AI agents, announced a $60 million Series B on October 20, 2026. FirstMark led the round, which values the company at $1 billion and lifts total funding to $91 million. The raise comes just eight months after Daytona's $24 million Series A, which FirstMark also led.
What Does Daytona Actually Sell?
Daytona sells sandboxes: secure, isolated compute environments where an AI agent can run code, use software and complete tasks without touching a customer's core systems. The environments run on Linux, Windows and macOS, and the company says they spin up in about 60 milliseconds. Customers use them to train and evaluate models and to run agents in production.
Chief executive Ivan Burazin co-founded the company in 2023 with Goran Draganić and Vedran Jukić. Its core engineering is split between Split and Zagreb in Croatia, which makes it the country's third unicorn. Burazin framed the product around a simple premise: "Companies are going to manage thousands of digital employees, and each one needs a safe place to fail."
Who Backed the Round?
FirstMark led, and a group of operators joined it: Patrick Collison of Stripe, Adam D'Angelo of Quora, Brendan Foody of Mercor, Tobi Lütke of Shopify, Olivier Pomel of Datadog, Aravind Srinivas of Perplexity and Eric Yuan of Zoom. Institutional participants included Alumni Ventures, Evergreen Fund, Okta Ventures, Qualcomm Ventures, Samsung Next and Torch Capital.
Existing investors also added to their positions. Pace Capital doubled its investment, Upfront Ventures tripled it and E2VC quadrupled it. Insiders raising their stakes by two to four times is a stronger signal than a fresh logo, though the individual check sizes were not disclosed.
How Fast Is Daytona Growing?
Daytona says its revenue run rate grew 25-fold between January and September 2026, an average of 50.9% per month. The company did not disclose absolute revenue, so the multiple has no visible base. A 25x rise from a small starting figure is a different claim than the same rise from a large one.
The customer list is more concrete. Daytona names Anthropic, OpenAI, NVIDIA, Cursor and Cognition among its infrastructure users, with Meta, Cohere, Mercor, Handshake, Surge AI, SambaNova, Postman, Bolt.new, n8n and Clay also listed. Snorkel and Trajectory use the product for training and evaluation. Whether those relationships are production contracts or pilots is not specified.
Is a $1 Billion Valuation Justified for a Sandbox Business?
The valuation rests on a bet that agent workloads will need their own category of compute, separate from conventional virtual machines. Daytona's pitch is that every agent needs a computer, and that agent fleets will multiply the number of machines a company runs by orders of magnitude. If that holds, a vendor with early lock-in at the frontier labs captures a large slice of spend.
The counterargument is plain. Sandboxing is a feature that large cloud providers can ship, and several already offer isolated execution environments. The company's technical team is also small, at roughly 20 engineers by one account. A unicorn price on a product category that is still being defined leaves little room for a slow quarter. The Series A valuation was undisclosed, so the step-up between rounds cannot be measured.
What Will the Money Fund?
Daytona plans to expand its agent cloud platform, scale its compute infrastructure and grow its team across San Francisco, Croatia and Singapore. Hiring is aimed at engineering and at a go-to-market sales team, a shift for a company whose early growth came largely from developer adoption. Running millions of short-lived machines is capital-intensive, so a meaningful share of the proceeds is likely to go to compute capacity.
Outlook
Daytona has moved from a $1.8 million pre-seed in November 2023 to a $1 billion valuation in under three years, with FirstMark leading both of its last two rounds. The next test is whether growth holds once the company moves past its first wave of AI-native customers into enterprise buyers with longer procurement cycles. Competition from hyperscalers and other sandbox startups will determine whether sandboxes stay a standalone business or become a line item inside larger cloud contracts.
