FoundryLabs, Inc.

San Francisco, CaliforniaFounded 2023

1Tools Listed

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E2B provides open-source, secure cloud infrastructure purpose-built for AI agents, giving every enterprise AI agent its own cloud computer with real-world tools to perform multi-step tasks safely, transparently, and flexibly.

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Founding Story

Founded in 2023 by childhood friends Vasek Mlejnsky and Tomas Valenta who had been collaborating since 6th grade. Originally started as DevBook, focused on creating interactive documentation and playgrounds for developers. In March 2023, following the release of GPT-3.5, they faced a critical problem while building their coding agent - spinning up VMs took too long and existing infrastructure wasn't suitable for AI agents. They pivoted from DevBook to E2B (English to Bits), shifting focus from hosting full agents to providing the infrastructure layer - secure cloud sandboxes for code execution. The company moved headquarters from Prague to San Francisco to be closer to the AI ecosystem, though recently reopened an office in Prague.

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Leadership

Founders

Vasek Mlejnsky (Václav Mlejnský)

Co-Founder and CEO with 10 years of software engineering experience focused on developer tooling and AI-native infrastructure. Originally from Czech Republic, studied at Charles University Faculty of Mathematics and Physics. Previously worked on iPhone game development, computer vision projects, serverless function tools, search engines for developers, and no-code backend builders. Moved to San Francisco in 2021 via Pioneer accelerator. Has collaborated with co-founder since 6th grade.

Tomas Valenta (Tomáš Valenta)

Co-Founder and CTO. Founder of DevBook (predecessor to E2B). Studied at Gymnazium Uherske Hradiste. Background includes iPhone game development, computer vision, and various developer tools. Originally from Czech Republic, childhood friend and long-time collaborator of Vasek Mlejnsky.

Executive Team

Vasek Mlejnsky (Václav Mlejnský)

Co-Founder and CEO

10 years of software engineering experience focused on developer tooling and AI-native infrastructure. Previously built iPhone games, computer vision projects, and various developer tools.

Tomas Valenta (Tomáš Valenta)

Co-Founder and CTO

Founder of DevBook. Computer science background with experience in game development and developer infrastructure.

Business Model

Revenue Model

Usage-based API pricing with subscription tiers. Revenue generated from per-second sandbox runtime charges based on CPU and RAM allocation, plus tiered subscription plans.

Pricing Tiers

Hobby

Free + usage costs

One-time $100 usage credit, community support, up to 1-hour sandbox session length, up to 20 concurrent sandboxes, 10 GiB free storage. No credit card required.

Pro

$150/month + usage costs

Everything in Hobby tier, customizable Sandbox CPU and RAM, up to 24-hour sandbox session length, up to 100 concurrent sandboxes, 20 GiB free storage. Payments via Stripe.

Enterprise/Ultimate

Custom pricing + usage costs

Custom solutions with BYOC (Bring Your Own Cloud), on-premise deployment, role-based access control, workload isolation, data residency compliance, special pricing.

Private - not publicly traded