Braintrust vs TrueFoundry: who uses which
Customers, public proof and the companies that use both.
On usedby, 39 companies use Braintrust and 27 use TrueFoundry. 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: 66 of 66 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, TrueFoundry, or both
Every company with a public proof for at least one of the two tools.
39
use only Braintrust
0
companies use both
27
use only TrueFoundry
39 companies use only Braintrust, 27 use only TrueFoundry and 0 use both, out of the 66 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
We have not started tracking changes for TrueFoundry yet.
Who uses both
Companies with a confirmed or observed line on both tools.
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Braintrust
TrueFoundryWhat 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
TrueFoundry
7+ production services upgraded in <20 minutes, without infra dependencies
Aviva Credito
Vendor case study, truefoundry.com, captured Oct 6, 2026
the gateway processed more than 4 million requests across chat completions, responses, embeddings, and MCP calls
FloQast
Vendor case study, truefoundry.com, captured Oct 6, 2026
Questions about Braintrust and TrueFoundry
Which is used more, Braintrust or TrueFoundry?
Braintrust has more customers on usedby: 39 against 27 for TrueFoundry.
Do companies use both Braintrust and TrueFoundry?
usedby has not found a company with a confirmed or observed line on both Braintrust and TrueFoundry yet.
Who uses Braintrust?
39 companies on usedby, each with the public page that shows it. See who uses Braintrust.
Who uses TrueFoundry?
27 companies on usedby, each with the public page that shows it. See who uses TrueFoundry.
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.