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These are publisher documentation checks. ASE has not independently tested these workflows, outputs, billing, privacy controls or accessibility. Matching labels do not establish equivalent capabilities or safety, and this page does not rank a winner.

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LangSmith

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LangSmith records application traces and supports datasets, evaluations, prompt work and release comparisons. Cloud, hybrid and self-hosted deployment have different entitlements.

Availability
Available. Core platform available. Hosting and individual services have plan/stage differences; verify Engine or other service entitlement separately.
How to use it
Web app; API; Library / CLI. Browser dashboard plus supported instrumentation/SDKs; self-hosted or hybrid deployment requires the relevant enterprise entitlement.
Processing and data
Vendor cloud; Self-hosted option; Local and cloud options. Traces may contain prompts, outputs and tool data. Inspect instrumentation, redaction, retention and the selected hosting route before sending production content.
Costs and limits
Developer allowance; paid seats, usage and service entitlements
Outputs
Traces, datasets, evaluator results and experiments. Observed scores do not establish correctness or a security guarantee.

Developer trace allowances do not make all usage free. Seats, retained traces, model calls and additional services may be billed. Engine's historical beta announcement does not establish current GA.