Vendor comparison · Reviewed October 14, 2026
LangSmith vs EvalGate: which works better for LangGraph agent tests?
LangSmith is especially suitable for LangChain and LangGraph teams that need native agent tracing and managed development tools. EvalGate is an option when a framework-portable local regression gate and a reviewed release baseline matter more than framework-native tooling.
Choose LangSmith when
LangGraph-native agent tracing, debugging and managed workflows.
Choose EvalGate when
Framework-portable behavioral checks and CI release evidence.
What each product does better
| EvalGate | LangSmith |
|---|---|
| Local-first tests without migrating the existing agent. | Deep integration with LangChain and LangGraph workflows. |
Pricing
LangSmith has both free and paid plans, with usage metering; verify current per-seat and event costs.
EvalGate's local gate can run without a hosted account. Hosted result charges and separate model-provider inference fees are not equivalent to a competitor's trace, seat or token units.Compare EvalGate cost models
Verify current LangSmith terms and product documentationLimitations
EvalGate is not a drop-in replacement for LangSmith deployment or framework-native debugging.
How to migrate or run both
Keep LangSmith tracing. Reproduce a real known agent failure as a version-controlled EvalGate case; compare gate and trace evidence during a transition.
Test a real regression
The public EvalGate refund-agent example reproduces a passing baseline, a breaking change that gets blocked, and a corrected passing run using the published SDK without signup. This is evidence for the checked behaviors, not proof of universal safety.
Open executable exampleEvalGate remains controlled beta. See thecurrent feature-status inventorybefore using a release control in production.