# William Bryk

> William Bryk is co-founder of Exa. Exa API + MCP on Anchor Terminal, with grades, an about and public profiles.

- Canonical: https://www.anchorterminal.com/people/william-bryk/
- Markdown: https://www.anchorterminal.com/people/william-bryk/index.md (~800 tokens)
- Slim: https://www.anchorterminal.com/people/william-bryk/index.min.md (~580 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/people/william-bryk/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, Exa.

William Bryk is co-founder and CEO of Exa, a web search API built for LLMs that went through Y Combinator's Summer 2021 batch. Bryk studied computer science and physics at Harvard, doing machine learning research there, and was a software engineer at the ML startup Cresta before starting Exa.

- LinkedIn: https://www.linkedin.com/in/william-bryk
- X: https://x.com/WilliamBryk

## What William builds

- [Exa API + MCP](https://www.anchorterminal.com/tools/exa-mcp.md), graded B, 66.1/100, in Web search APIs. Exa's REST API over its own web index, with the official MCP server in front of it. Co-founder, Exa, researched 2026-10-26.

## Works with

- [Jeffrey Wang](https://www.anchorterminal.com/people/jeffrey-wang/), Co-founder, Exa

## Backed by

- [Y Combinator](https://www.anchorterminal.com/investors/y-combinator/)
- [Lightspeed Venture Partners](https://www.anchorterminal.com/investors/lightspeed-venture-partners/)
- [NVIDIA](https://www.anchorterminal.com/investors/nvidia/)
- [Benchmark](https://www.anchorterminal.com/investors/benchmark/)
- [Andreessen Horowitz](https://www.anchorterminal.com/investors/andreessen-horowitz/)

## Questions

### Who is William Bryk?

William Bryk is co-founder and CEO of Exa, a web search API built for LLMs that went through Y Combinator's Summer 2021 batch. Bryk studied computer science and physics at Harvard, doing machine learning research there, and was a software engineer at the ML startup Cresta before starting Exa.

### What does Exa make?

Anchor Terminal lists Exa API + MCP from Exa. Exa's REST API over its own web index, with the official MCP server in front of it.

### Who has invested in Exa?

The sources our research read name Y Combinator, Lightspeed Venture Partners, NVIDIA, Benchmark and Andreessen Horowitz.

### How are William's tools graded?

Exa API + MCP is graded B, 66.1 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://www.ycombinator.com/companies/exa
- https://exa.ai/
- https://exa.ai/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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