Braintrust vs CrewAI: who uses which
Customers, public proof and the companies that use both.
On usedby, 39 companies use Braintrust and 13 use CrewAI. No company is listed with both yet. Braintrust leads among the DevTools & Infrastructure companies on usedby that use either tool.Latest check Oct 7, 2026: 52 of 52 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 Braintrust, CrewAI, or both
Every company with a public proof for at least one of the two tools.
39
use only Braintrust
0
companies use both
13
use only CrewAI
39 companies use only Braintrust, 13 use only CrewAI and 0 use both, out of the 52 companies on usedby that use at least one of them.
Where it lands
Newest customers
We have not started tracking changes for Braintrust yet.
Where it lands
Newest customers
No new customer since tracking started on October 6, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Braintrust, CrewAI or both: a share of the companies on usedby, not of the market.
Braintrust onlyBothCrewAI only
More common with Braintrust
- DevTools & Infrastructure10 of the 11 DevTools & Infrastructure companies on usedby that use either tool use Braintrust.
- Fintech & Payments4 of the 5 Fintech & Payments companies on usedby that use either tool use Braintrust.
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.
Braintrust
CrewAIWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Braintrust
Continuous signal, 30-min fix cycles
Rex
Vendor case study, braintrust.dev, captured Oct 6, 2026
CrewAI
The agent lifted qualified‑lead volume by 80%
Brickell Digital
Vendor case study, crewai.com, captured Oct 6, 2026
We can now integrate a new carrier in 10 minutes that used to take us 5 days.”
Gelato
Vendor case study, crewai.com, captured Oct 6, 2026
Questions about Braintrust and CrewAI
Which is used more, Braintrust or CrewAI?
Braintrust has more customers on usedby: 39 against 13 for CrewAI.
Do companies use both Braintrust and CrewAI?
usedby has not found a company with a confirmed or observed line on both Braintrust and CrewAI yet.
Who uses Braintrust?
39 companies on usedby, each with the public page that shows it. See who uses Braintrust.
Who uses CrewAI?
13 companies on usedby, each with the public page that shows it. See who uses CrewAI.
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.