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

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