By Hamza Faisal

AI agents are getting their own cloud. Daytona, a Croatian-founded startup building isolated virtual computers where AI agents can run code and tools, said Tuesday it has raised a $60 million Series B round at a $1 billion valuation, making it Croatia's third unicorn after Infobip and Rimac.

The round was led by New York-based FirstMark, which also led Daytona's $24 million Series A in February. The company said about $50 million of the new funding came from existing investors, with strategic money from Qualcomm Ventures, Samsung Next and Okta Ventures also joining.

The who's-who of angels

The cap table reads like a founder-CEO hall of fame. Stripe's Patrick Collison, Shopify's Tobi Lütke, Perplexity's Aravind Srinivas, Quora's Adam D'Angelo and Zoom's Eric Yuan all took part as angel investors.

With the new round, Daytona has raised roughly $91 million to date: a $2 million pre-seed in 2023, a $5 million seed in 2024, the February Series A and now the Series B, which CEO Ivan Burazin confirmed to Fortune.

Sandboxes built for agents, not apps

Daytona's core product is the sandbox: an isolated, programmable virtual computer where an AI agent can execute code, call tools and persist state without touching a company's own systems. The company says a new environment spins up in about 60 milliseconds — a fraction of the 30 seconds to several minutes a virtual machine takes at big cloud providers.

Burazin puts the thesis simply: models think on GPUs, but agents work on CPUs. The company is already counting some of the biggest names in AI as customers, including OpenAI, Anthropic, Nvidia and Meta, alongside Cursor, Cognition and Cohere.

Agents at work need computers too

Founded in 2023 by Burazin with CTO Vedran Jukić and chief architect Goran Draganić, Daytona began as a tool for automatically setting up developer environments before pivoting to agent infrastructure as generative AI took off. Its technical team of about 20 works primarily from offices in Split and Zagreb, Croatia, while the company is headquartered in San Francisco.

The fresh funds will go toward expanding the go-to-market team and hiring more engineers. Burazin has warned of a coming CPU crunch: if millions of agents each need their own working computer, the sheer volume of CPU machines required may not exist yet — and Daytona intends to be the company that supplies them.

By Hamza Faisal