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Will Bryk, co-founder and CEO of ExaExaSan Francisco, US
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Exa CEO Will Bryk: Email Address, LinkedIn and Bio (2026)

Curated by Khrystyna Oleksiienko · Published

Will Bryk is the co-founder and CEO of Exa, the search engine for AI he started in 2021, as Metaphor, with his Harvard roommate Jeff Wang. He has published no email address; he takes messages on X, where he is @WilliamBryk.

Company overview

Company
Exa Labs Inc. (formerly Metaphor Systems, Inc.)
Industry
Software: web search API and search engine for AI
Founded
2021
Headquarters
San Francisco, US
Revenue
Over $100M in annualized revenue (Oct 2026)
Funding stage
Series C: $250M led by a16z at a $2.2B valuation (May 2026); about $357M raised in total

Will Bryk at a glance

Fact

Detail

Role

Co-founder and CEO of Exa, formerly Metaphor, since 2021

Co-founder

Jeff Wang, his roommate at Harvard

Education

Harvard, computer science and physics, class of 2019 (GitHub)

Before Exa

One of the first engineers at Cresta; internships at SpaceX and Zoox

Grew up in

New York City; lives in San Francisco

Age

27 in July 2024; no birth date published

Net worth

No published estimate

Email

None published; he asks people to DM him

LinkedIn

linkedin.com/in/william-bryk

X

@WilliamBryk

Exa CEO email address: how to reach Will Bryk

Bryk hasn’t published an email address. When he invites people to get in touch, on X and LinkedIn, he asks them to send a direct message, and X is where he posts most: launches, hires and Exa’s numbers. Exa staff use their full first name at exa.ai: {first}@exa.ai, such as maya@exa.ai for a fictional Maya Chen.

Channel

Address

Note

X

@WilliamBryk

His most active channel; open to direct messages

LinkedIn

Will Bryk

Posts Exa milestones

Exa sales

sales@exa.ai

For companies that want to use Exa

Exa email address pattern

Exa staff use their full first name at exa.ai: {first}@exa.ai, such as maya@exa.ai for a fictional Maya Chen.

Format

Example (fictional name: Maya Chen)

Who uses it

Status

{first}@exa.ai

maya@exa.ai

31 of 33 staff addresses Exa’s people have published

Current, standard

{f}{last}@exa.ai

mchen@exa.ai

Possibly one address

Rare

{first}.{last}@exa.ai

maya.chen@exa.ai

No one we could find

Not used

Before emailing any pattern-based address, run it through a verifier: a bounce hurts deliverability for every later send. All Exa patterns and official inboxes are on the Exa email format page.

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Career timeline

Date

Milestone

Oct 13, 2026

Announces Exa has passed $100 million in annualized revenue (Exa)

Aug 21, 2026

Hires Jeff Pinner, formerly of Robinhood and Lyft, as CTO

May 20, 2026

$250 million Series C led by a16z, at a $2.2 billion valuation (Exa)

Sep 3, 2025

$85 million Series B led by Benchmark, at $700 million (Exa)

Jul 16, 2024

$17 million Series A led by Lightspeed

Jan 25, 2024

Renames Metaphor to Exa (Exa)

Nov 2022

Launches Metaphor’s search engine

2021

Co-founds Metaphor with Jeff Wang; Y Combinator, Summer 2021 (Y Combinator)

Until 2021

Software engineer at Cresta, an AI startup for customer support

2015 to 2019

Harvard: computer science and physics; leads the robotics club; internships at SpaceX and Zoox

How Will Bryk built Exa

Bryk grew up in New York and met Jeff Wang in their first year at Harvard; as roommates they built a search engine together (Exa). After graduating he joined Cresta as one of its first engineers, building real-time AI products, and wrote a book about the history of civilization in his spare time. “When I realized the future of civilization depends almost entirely on the quality of information we consume, I left to start Exa,” he writes (Y Combinator).

The idea, in 2021, was a better Google: “Transformers normally predict the next word. We train our search engine to predict the next link” (TechCrunch). Metaphor’s search engine launched in November 2022, two weeks before ChatGPT. When AI developers asked for its results through an API, Bryk turned the company toward search for AI, which took revenue past $100 million a year by October 2026. He calls Exa “the OpenAI of search… a research startup that does like fundamental research” (Latent Space).

Will Bryk’s age and net worth

Bryk was 27 in July 2024 (TechCrunch), and graduated from Harvard in 2019; no birth date has been published. No estimate of his net worth has been published either. Exa is private, valued at $2.2 billion in May 2026, and the founders’ stakes aren’t disclosed.

Jeff Wang, Exa’s co-founder

Jeff Wang studied computer science and philosophy at Harvard, where he ran a GPU cluster in his dorm room and shared a room with Bryk, then spent three years building data and web infrastructure at Plaid (Exa). He was 26 in July 2024. He sits on Exa’s board and now works on how Exa sells, building what he calls knowledge systems for go-to-market teams.

In his own words

“We need to build superknowledge before superintelligence.”

— Will Bryk, July 12, 2024 (Exa)

“Today, searching the internet feels more like navigating a landfill.”

— Will Bryk, January 25, 2024

“I remember when I told my dad I was building a new search engine in 2021, he replied, ‘Isn’t Google already good enough?’. It’s not good enough.”

— Will Bryk, January 7, 2025 (Exa)

“Because Google makes money from ads, they’re not actually optimized to build the best general search engine in the world.”

— Will Bryk, May 6, 2025 (Hacker News)

“Information is critical civilizational infrastructure for our new AI reality.”

— Will Bryk, May 20, 2026

Exa’s leadership

Person

Role

Will Bryk

Co-founder and CEO

Jeff Wang

Co-founder and director

Jeff Pinner

CTO since August 2026, formerly CTO of Robinhood and of Lyft (X)

Marcus Holm

Chief revenue officer since May 2026, formerly president of LaunchDarkly

Liam Hinzman

Head of R&D product engineering

Exa’s funding, revenue and products are on the Exa company profile. a16z’s partner Sarah Wang, who led the Series C, joined the board (a16z).

Frequently asked questions

Will Bryk, who co-founded Exa in 2021, as Metaphor, with Jeff Wang and has been CEO since the start.

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