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Well Run profileThe Well Run 100 · #28 of 720

Position 28

Exa

Web search API built for AI agents and apps, on its own crawl index

Pace
3:30/kmSprint5.5
Distance
Distance Half.
Open ops roles
4
Last week
#22
Move
▼ 6
Peak
#22
Weeks in the 100
2
The Chart →
Rank and score over time
Board rank
#12#24#36#22Oct 18#26Oct 25
Pace score
02465.5Oct 185.5Oct 25

One point per Sunday re-rank, tracking since Oct 18. The lines fill in week by week.

Race 4:05/km
Tempo 4:40/kmPerplexity
Steady 5:20/km
Warm-up 6:00/km
Cool-down 6:30/km
Exa runs in the Sprint lane, alongside 2 rivals. Rivals on Well Run sit in their own pace lanes; further right = more momentum. Tap one to open its page.Also competes with: Tavily, SerpAPI
Revenue estimate
~$10M ARRestimate · as of Sep 2025 siliconvalleyinvestclub.com ↗
Total raised
~$357Msee rounds ↓
Headcount
~120as of May 2026 siliconvalleyinvestclub.com ↗
Founded
2021
HQ
San Francisco, CA

Leadership

The problem

AI products need fresh, accurate web results, and search engines built for humans serve them poorly

What they do

Web search API built for AI agents and apps, on its own crawl index

Traction 5,000+ companies and 400,000+ developers; ARR ~$10M, up ~11x YoY (Sacra est., Sep 2025)

Hiring trend

Open roles
57
Ops roles
4
Headcount
~150

~80 staff (Mar 2026) to ~150 (Sep 2026, per Exa job post); 56 open roles

Hiring in

  • San Francisco
  • New York
  • London

Funding

Last round
$250M
Stage
Series C
Date
May 2026

Led by Andreessen Horowitz

Distance

Half · edge: learns from use

Its own 500B+ URL index, embedding models and GPU cluster are hard to copy versus search wrappers, but foundation labs bundling native search, plus Parallel and Tavily, make switching easy for many queries

Sources: Exa blog, May 2026: own crawl of 500B+ URLs, own models and GPU cluster ↗ · Sacra ex-employee interview, Feb 2026: about half of a customer's queries could move to SERP APIs or Parallel ↗ · Dealroom, May 2026: Google and incumbents are the main threat ↗ · Exa blog, Oct 2026: new Places index (211M places) beside Search, Contents, Agent and Websets ↗

Last checked Oct 25, 2026

News timeline

  1. Oct 2026Launches Places index (211M places) alongside Search and Websets exa.ai ↗
  2. Jun 2026Introduces Exa Agent exa.ai ↗
  3. May 2026Raises $250M Series C at $2.2B led by a16z; LaunchDarkly president joins as CRO exa.ai ↗
  4. Apr 2026Announces partnership with Google exa.ai ↗
  5. Sep 2025Raises $85M Series B at $700M led by Benchmark bloomberg.com ↗

Funding historyTotal raised ~$357M

  1. May 2026Series C$250Mat $2.2BLed by Andreessen Horowitz exa.ai ↗
  2. Sep 2025Series B$85Mat $700MLed by Benchmark exa.ai ↗
  3. Jul 2024Series A$17MLed by Lightspeed Venture Partners techcrunch.com ↗
  4. Seed$5Mtechcrunch.com ↗

Profile facts checked Oct 19, 2026. Every fact links to its public source.

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