Braintrust vs Browserbase: who uses which
Customers, public proof and the companies that use both.
On usedby, 42 companies use Braintrust and 19 use Browserbase. 3 companies use both, including Ramp, Vercel, and Lovable. Braintrust leads among the DevTools & Infrastructure companies on usedby that use either tool, Browserbase among the Artificial Intelligence companies.Latest check Oct 14, 2026: 61 of 61 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 Braintrust, Browserbase, or both
Every company with a public proof for at least one of the two tools.
39
use only Braintrust
3
companies use both
16
use only Browserbase
39 companies use only Braintrust, 16 use only Browserbase and 3 use both, out of the 58 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, Browserbase |
|---|---|
 Ramp | On or before Oct 2026 |
 Vercel | On or before Feb 2026 |
 Lovable | On or before Oct 2026 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Braintrust, Browserbase or both: a share of the companies on usedby, not of the market.
Braintrust onlyBothBrowserbase only
More common with Braintrust
- DevTools & Infrastructure12 of the 12 DevTools & Infrastructure companies on usedby that use either tool use Braintrust, 1 of them alongside Browserbase.
- Fintech & Payments5 of the 7 Fintech & Payments companies on usedby that use either tool use Braintrust, 1 of them alongside Browserbase.
- Sales Tech & CRM3 of the 5 Sales Tech & CRM companies on usedby that use either tool use Braintrust.
More common with Browserbase
- Artificial Intelligence7 of the 10 Artificial Intelligence companies on usedby that use either tool use Browserbase, 1 of them alongside Braintrust.
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.
BraintrustBrowserbaseWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Braintrust
100,000s of public eval dashboard views
Browserbase
Vendor case study, braintrust.dev, captured Oct 9, 2026
Continuous signal, 30-min fix cycles
Rex
Vendor case study, braintrust.dev, captured Oct 6, 2026
Browserbase
No reviewed story for Browserbase yet.
Questions about Braintrust and Browserbase
Which is used more, Braintrust or Browserbase?
Braintrust has more customers on usedby: 42 against 19 for Browserbase. Braintrust leads among the DevTools & Infrastructure companies on usedby that use either tool, Browserbase among the Artificial Intelligence companies.
Do companies use both Braintrust and Browserbase?
Yes. 3 companies use both on usedby, including Ramp, Vercel, and Lovable.
Who uses Braintrust?
42 companies on usedby, each with the public page that shows it. See who uses Braintrust.
Who uses Browserbase?
19 companies on usedby, each with the public page that shows it. See who uses Browserbase.
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 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.