ChatGPT vs Glean: who uses which
Customers, public proof and the companies that use both.
On usedby, 40 companies use ChatGPT and 49 use Glean. 4 companies use both, including Canva, Intercom, and Zapier. Glean leads among the Fintech & Payments companies on usedby that use either tool.Latest check Oct 8, 2026: 50 of 89 public lines checked. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side.
Who uses ChatGPT, Glean, or both
Every company with a public proof for at least one of the two tools.
35
use only ChatGPT
4
companies use both
44
use only Glean
35 companies use only ChatGPT, 44 use only Glean and 4 use both, out of the 84 companies on usedby that use at least one of them.
1 more company is listed for both, with a job post on one side: not counted as using both.
Where it lands
Newest customers
We have not started tracking changes for ChatGPT yet.
Where it lands
Newest customers
No new customer since tracking started on October 7, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
| Company |
|---|
 Canva |
 Intercom |
 Zapier |
 Zillow |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use ChatGPT, Glean or both: a share of the companies on usedby, not of the market.
ChatGPT onlyBothGlean only
More common with Glean
- Fintech & Payments6 of the 9 Fintech & Payments 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: confirmed and observed usedby lines. Job-post signals, the weakest proof level, are left out of these shares.
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
ChatGPTGleanWhat customers report
Results as the vendor or the customer published them, with the source and the date.
ChatGPT
No reviewed story for ChatGPT yet.
Glean
30+ min saved on searches with Glean
Pure Storage
Vendor case study, glean.com, captured Oct 7, 2026
What once took PMs up to 4 hours per document now takes just minutes
Nile
Vendor case study, glean.com, captured Oct 7, 2026
Questions about ChatGPT and Glean
Which is used more, ChatGPT or Glean?
Glean has more customers on usedby: 49 against 40 for ChatGPT.
Do companies use both ChatGPT and Glean?
Yes. 4 companies use both on usedby, including Canva, Intercom, and Zapier.
Who uses ChatGPT?
40 companies on usedby, each with the public page that shows it. See who uses ChatGPT.
Who uses Glean?
49 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 three proof levels: confirmed, observed or signal (a job post, the weakest). A company is named as using both tools when its lines on both are confirmed or observed.