GitBook vs Glean: who uses which
Customers, public proof and the companies that use both.
On usedby, 37 companies use GitBook and 59 use Glean. 2 companies use both, including Deepgram and Ericsson. GitBook leads among the DevTools & Infrastructure companies on usedby that use either tool, Glean among the Fintech & Payments companies.Latest check Nov 13, 2026: 90 of 96 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 GitBook, Glean, or both
Every company with a public proof for at least one of the two tools.
35
listed for GitBook only
2
companies use both
57
listed for Glean only
On usedby, 35 companies are listed for GitBook only, 57 are listed for Glean only and 2 use both, out of the 94 companies listed for at least one. An absent listing does not prove non-use.
Where it lands
Recently publicly listed customers
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 | First public proof, GitBook | First public proof, Glean |
|---|---|---|
 Deepgram | On or before Nov 2026 | On or before Nov 2026 |
 Ericsson | — | On or before Mar 2025 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use GitBook, Glean or both: a share of the companies on usedby, not of the market.
Listed for GitBook onlyBothListed for Glean only
More common with GitBook
- DevTools & Infrastructure3 of the 5 DevTools & Infrastructure companies on usedby that use either tool use GitBook.
More common with Glean
- Fintech & Payments6 of the 10 Fintech & Payments companies on usedby that use either tool use Glean.
- Marketing Tech4 of the 6 Marketing Tech companies on usedby that use either tool use Glean.
- Data & Analytics5 of the 5 Data & Analytics companies on usedby that use either tool use Glean.
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: GitBook, 5 of 6; Glean, 3 of 6. Missing facts remain unverified, not absent features.
GitBookGleanWhat customers report
Results as the vendor or the customer published them, with the source and the date.
GitBook
How Mozilla.ai uses GitBook
Mozilla.ai
Vendor case study, gitbook.com, captured Nov 13, 2026
Glean
saving more than 1,500 hours monthly
Super
Vendor case study, glean.com, captured Nov 11, 2026
With 92% adoption, Glean helps Upside employees find what they need
Upside
Vendor case study, glean.com, captured Nov 11, 2026
Evidence for your decision: Glean
Source observations. Check the required plan and conditions before choosing.
Documented tasks
McCarthy HoldingsAutomate internal business workflows
With Glean's agent capabilities, McCarthy teams are now building and deploying purpose-built agents that automate complex, data-intensive workflows.
NileAutomate internal business workflows
Glean has enabled teams across Nile to build customized agents for their most important workflows, as well as bring other applications and AI tools into one agentic ecosystem.
Choice criteria
Integration: BoxSourced observation
Plan: Unknown
Easily integrate 275+ apps across ecosystems out of the box.
Integration: Google ChatSourced observation
Plan: Unknown
Conditions: Product scope needs verification
Product: glean
Setup and limits: Named plan, contract entitlement, connector scopes, permissions, volume limits and regional eligibility remain unknown.; Documented only; not_tested. No authenticated vendor operation executed.; Named integration listing only; operation semantics and data direction are not established.
Google ChatNativeCommunication
Questions about GitBook and Glean
Which is used more, GitBook or Glean?
Glean has more customers on usedby: 59 against 37 for GitBook. GitBook leads among the DevTools & Infrastructure companies on usedby that use either tool, Glean among the Fintech & Payments companies.
Do companies use both GitBook and Glean?
Yes. 2 companies use both on usedby, including Deepgram and Ericsson.
Who uses GitBook?
37 companies on usedby, each with the public page that shows it. See who uses GitBook.
Who uses Glean?
59 companies on usedby, each with the public page that shows it. See who uses Glean.
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.