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E2B

Open-source secure cloud sandboxes that give every AI agent its own isolated Linux computer to run code, browse files, and use real-world tools — adopted by 88% of the Fortune 100. Founded in 2023 in Prague by Vasek Mlejnsky and Tomas Valenta, E2B spins up firecracker-based microVM sandboxes in under 200 milliseconds, allowing AI applications from Hugging Face, Perplexity, and enterprise agent platforms to safely execute LLM-generated code at massive scale. The company has raised about $35M total, including a $21M Series A led by Insight Partners in July 2025, on the back of running millions of sandboxes per month with strong growth.
Every serious agent product needs a sandbox runtime, and E2B has become the de facto open-source standard — the Stripe-style developer-first primitive for the agentic computing era.
e2b.dev AI Agent InfrastructureUnited States flagUnited Statesprivate

At a glance

Total raised
$35M
last round series a
Headcount
11-50
approximate · public range
Headquarters
San Francisco
United States flagUnited States
Founded
2023
3 years active
Status
Private
AI Agent Infrastructure
Subsector
AI Agent Infrastructure
AI Agent Infrastructure
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