ChatGPT vs Gemini: who uses which
Customers, public proof and the companies that use both.
On usedby, 54 companies use ChatGPT and 77 use Gemini. 6 companies use both, including Salesforce, Spotify, and Etsy. ChatGPT leads among the Banking & Mortgages companies on usedby that use either tool, Gemini among the Artificial Intelligence companies.Latest check Oct 19, 2026: 100 of 131 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 ChatGPT, Gemini, or both
Every company with a public proof for at least one of the two tools.
48
use only ChatGPT
6
companies use both
1 of them is listed through a job post on one side, the weakest proof.
71
use only Gemini
48 companies use only ChatGPT, 71 use only Gemini and 6 use both, 1 of them through a job post on one side, out of the 125 companies on usedby that use at least one of them.
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, Gemini |
|---|---|
 Salesforce | On or before Oct 2026 |
 Spotify | On or before Oct 2026 |
 Etsy | On or before Oct 2026 |
 Figma | On or before Oct 2026 |
 Notion | On or before Oct 2026 |
 Fivetranjob posts for both | — |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use ChatGPT, Gemini or both: a share of the companies on usedby, not of the market.
ChatGPT onlyBothGemini only
More common with ChatGPT
- Banking & Mortgages4 of the 7 Banking & Mortgages companies on usedby that use either tool use ChatGPT.
- Fintech & Payments5 of the 7 Fintech & Payments companies on usedby that use either tool use ChatGPT.
More common with Gemini
- Artificial Intelligence13 of the 13 Artificial Intelligence companies on usedby that use either tool use Gemini.
- Data & Analytics6 of the 7 Data & Analytics companies on usedby that use either tool use Gemini, 1 of them alongside ChatGPT.
- DevTools & Infrastructure5 of the 7 DevTools & Infrastructure companies on usedby that use either tool use Gemini, 1 of them alongside ChatGPT.
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.
ChatGPTGeminiWhat customers report
Results as the vendor or the customer published them, with the source and the date.
ChatGPT
with people saving nearly three hours per week on routine tasks and more than 80% engaging daily.
BBVA
Vendor case study, openai.com, captured Oct 18, 2026
Gemini
No reviewed story for Gemini yet.
Questions about ChatGPT and Gemini
Which is used more, ChatGPT or Gemini?
Gemini has more customers on usedby: 77 against 54 for ChatGPT. ChatGPT leads among the Banking & Mortgages companies on usedby that use either tool, Gemini among the Artificial Intelligence companies.
Do companies use both ChatGPT and Gemini?
Yes. 6 companies use both on usedby, including Salesforce, Spotify, and Etsy.
Who uses ChatGPT?
54 companies on usedby, each with the public page that shows it. See who uses ChatGPT.
Who uses Gemini?
77 companies on usedby, each with the public page that shows it. See who uses Gemini.
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.