Braintrust vs Hatchet: who uses which
Customers, public proof and the companies that use both.
On usedby, 41 companies use Braintrust and 18 use Hatchet. 2 companies use both, including Eve and Greptile. Braintrust leads among the DevTools & Infrastructure companies on usedby that use either tool.Latest check Nov 13, 2026: 59 of 59 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, Hatchet, or both
Every company with a public proof for at least one of the two tools.
39
listed for Braintrust only
2
companies use both
16
listed for Hatchet only
On usedby, 39 companies are listed for Braintrust only, 16 are listed for Hatchet only and 2 use both, out of the 57 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, Braintrust |
|---|---|
 Eve | On or before Aug 2026 |
 Greptile | On or before Jul 2026 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Braintrust, Hatchet or both: a share of the companies on usedby, not of the market.
Listed for Braintrust onlyBothListed for Hatchet only
More common with Braintrust
- DevTools & Infrastructure12 of the 14 DevTools & Infrastructure companies on usedby that use either tool use Braintrust, 1 of them alongside Hatchet.
- Artificial Intelligence5 of the 6 Artificial Intelligence companies on usedby that use either tool use 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.
Vendor facts checked: Braintrust, 4 of 6; Hatchet, 0 of 6. Missing facts remain unverified, not absent features.
Braintrust
HatchetWhat 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 Nov 10, 2026
Continuous signal, 30-min fix cycles
Rex
Vendor case study, braintrust.dev, captured Nov 10, 2026
Hatchet
process up to 50,000 documents in under an hour through optimized parallel execution, compared to nearly a week with their previous setup
Aevy
Vendor case study, hatchet.run, captured Nov 13, 2026
How Greptile uses Hatchet
Greptile
Vendor case study, hatchet.run, captured Nov 13, 2026
Questions about Braintrust and Hatchet
Which is used more, Braintrust or Hatchet?
Braintrust has more customers on usedby: 41 against 18 for Hatchet.
Do companies use both Braintrust and Hatchet?
Yes. 2 companies use both on usedby, including Eve and Greptile.
Who uses Braintrust?
41 companies on usedby, each with the public page that shows it. See who uses Braintrust.
Who uses Hatchet?
18 companies on usedby, each with the public page that shows it. See who uses Hatchet.
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.