On usedby, 20 companies use Exa and 37 use GitBook. 1 company uses both, including Amazon. Exa leads among the DevTools & Infrastructure companies on usedby that use either tool, GitBook among the Artificial Intelligence companies.Latest check Nov 13, 2026: 57 of 57 public lines checked. Counts include every proof level, job-post signals included. A company on both tools counts at any proof level, and a job post on one side is marked as such.
Who uses Exa, GitBook, or both
Every company with a public proof for at least one of the two tools.
19
listed for Exa only
1
company uses both
36
listed for GitBook only
On usedby, 19 companies are listed for Exa only, 36 are listed for GitBook only and 1 uses both, out of the 56 companies listed for at least one. An absent listing does not prove non-use.
Who uses both
Companies with a public line on both tools, at any proof level: the strongest proofs come first, and a job post is marked.
| Company |
|---|
 Amazon |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Exa, GitBook or both: a share of the companies on usedby, not of the market.
Listed for Exa onlyBothListed for GitBook only
More common with Exa
- DevTools & Infrastructure5 of the 8 DevTools & Infrastructure companies on usedby that use either tool use Exa.
More common with GitBook
- Artificial Intelligence3 of the 5 Artificial Intelligence companies on usedby that use either tool use GitBook.
- Fintech & Payments4 of the 5 Fintech & Payments companies on usedby that use either tool use GitBook.
Source: every usedby line, from confirmed proofs to job-post signals (the weakest proof level).
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Vendor facts checked: Exa, 0 of 6; GitBook, 5 of 6. Missing facts remain unverified, not absent features.
ExaGitBookWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Exa
More than 9.1M Search requests to date
HockeyStack
Vendor case study, exa.ai, captured Nov 12, 2026
More than 7.2M Search requests to date: 11x uses Exa Search for high-volume prospect and account research.
11X
Vendor case study, exa.ai, captured Nov 12, 2026
GitBook
How Mozilla.ai uses GitBook
Mozilla.ai
Vendor case study, gitbook.com, captured Nov 13, 2026
Questions about Exa and GitBook
Which is used more, Exa or GitBook?
GitBook has more customers on usedby: 37 against 20 for Exa. Exa leads among the DevTools & Infrastructure companies on usedby that use either tool, GitBook among the Artificial Intelligence companies.
Do companies use both Exa and GitBook?
Yes. 1 company uses both on usedby, including Amazon.
Who uses Exa?
20 companies on usedby, each with the public page that shows it. See who uses Exa.
Who uses GitBook?
37 companies on usedby, each with the public page that shows it. See who uses GitBook.
How does usedby count customers?
A company counts when a public page shows it: a vendor's customer page, a case study, a press release or a job post, most saved with a dated capture. Every line is a customer, at one of four proof levels: confirmed, declared by the company itself, observed or signal (a job post, the weakest). A company counts as using both tools when it has a line on each, at any level; the list shows the strongest proofs first and marks job posts.