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Laminar vs LangSmith: catalog facts
Laminar	LangSmith
Free Free and open source under Apache 2.0; a managed platform is offered at laminar.sh.	Freemium Can be tried for free, with paid plans listed on its pricing page.
Web, Self-hosted	Web
Automatic tracing for many agent frameworks and model APIs Evals that run locally or in CI with a comparison UI	Detailed step-by-step agent tracing SDKs for Python, TypeScript, Go and Java
Requires adding its SDK to your application Self-hosting involves running several services including ClickHouse	Proprietary hosted service Self-hosting requires Kubernetes
Self-hosted, Hosted service	Self-hosted, Hosted service
Open source	Closed source
License: Apache-2.0	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.