# Tomas Valenta

> Tomas Valenta is co-founder and CTO. E2B on Anchor Terminal, with grades, an about and public profiles.

- Canonical: https://www.anchorterminal.com/people/tomas-valenta/
- Markdown: https://www.anchorterminal.com/people/tomas-valenta/index.md (~800 tokens)
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- JSON: https://www.anchorterminal.com/people/tomas-valenta/index.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-28

Co-founder and CTO.

Tomas Valenta is co-founder and CTO of E2B, which runs cloud sandboxes where AI agents execute code. He and Vasek Mlejnsky previously built DevBook, an in-browser docs and playground tool whose sandbox technology became the basis of E2B in 2023. E2B raised a $21m Series A led by Insight Partners in July 2025.

- LinkedIn: https://www.linkedin.com/in/valentatomas

## What Tomas builds

- [E2B](https://www.anchorterminal.com/tools/e2b.md), graded B, 68.5/100, in Code execution sandboxes. Firecracker microVM sandboxes for agent code, driven from Python and JavaScript SDKs, a CLI or a REST API. Co-founder and CTO, researched 2026-10-27.

## Works with

- [Vasek Mlejnsky](https://www.anchorterminal.com/people/vasek-mlejnsky/), Co-founder and CEO

## Backed by

- [Kaya](https://www.anchorterminal.com/investors/kaya/)
- [Decibel](https://www.anchorterminal.com/investors/decibel/)
- [Insight Partners](https://www.anchorterminal.com/investors/insight-partners/)
- [Sunflower Capital](https://www.anchorterminal.com/investors/sunflower-capital/)

## Questions

### Who is Tomas Valenta?

Tomas Valenta is co-founder and CTO of E2B, which runs cloud sandboxes where AI agents execute code. He and Vasek Mlejnsky previously built DevBook, an in-browser docs and playground tool whose sandbox technology became the basis of E2B in 2023. E2B raised a $21m Series A led by Insight Partners in July 2025.

### What does E2B make?

Anchor Terminal lists E2B from E2B. Firecracker microVM sandboxes for agent code, driven from Python and JavaScript SDKs, a CLI or a REST API.

### Who has invested in E2B?

The sources our research read name Kaya, Decibel, Insight Partners and Sunflower Capital.

### How are Tomas's tools graded?

E2B is graded B, 68.5 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://e2b.dev/about
- https://www.linkedin.com/in/mlejva
- https://www.linkedin.com/in/valentatomas
- https://e2b.dev/
- https://docs.e2b.dev/support
- https://e2b.dev/contact

These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page, /about/#author). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com.

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