Best Open Source Alternatives to Braintrust

Compare the best free and open-source alternatives to Braintrust — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated August 2026 · 3 alternatives

Braintrust

Proprietary SaaS

PricingPaid

Platformsweb

WebsiteVisit site

Braintrust alternatives compared

Open-source alternatives to Braintrust, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Langfuse	32,279	MIT	LinuxDockerWeb	Yes	Aug 2026	Visit
DeepEval	17,323	Apache-2.0	LinuxmacOSWindows	No	Jul 2026	Visit
Phoenix	10,852	Apache-2.0	LinuxmacOSWindows	No	Aug 2026	Visit