LaunchDarkly vs LangSmith

LaunchDarkly

LangSmith

LaunchDarkly · 15 features

• AI Configs — Manage AI prompts, models, and parameters as flags.
• Approvals — Require co-sign before flag changes in prod.
• Audit Log — Every change logged with user + timestamp.
• Auto Pause/Rollback — Guardrail metrics auto-revert a bad release.
• Code References — Scan code for flag references + stale flag cleanup.
• Contexts — Multi-context targeting: user + organization + device in one evaluation.
• Experimentation — A/B/n testing with stat significance. Bayesian + frequentist.
• Feature Flags — Boolean, multivariate (string/number/JSON) flags with targeting rules.
• Observability — Logs + traces + errors linked to flag changes.
• Relay Proxy — Self-hosted evaluation proxy for compliance / low-latency.
• Release Pipelines — Progressive rollout workflows with guards + approvals.
• SAML / SCIM — Enterprise SSO + SCIM provisioning.
• Session Replay — Frontend session recordings tied to flag exposure.
• Targeting Rules — Rule-based targeting on user attributes, country, device, custom contexts.
• Workflows — Scheduled flag changes + conditional workflows.

LangSmith · 14 features

• Alerts — Threshold alerts on latency, cost, eval metrics.
• Annotation Queues — Human-review workflows for trace quality rating.
• Custom Dashboards — Aggregate metrics dashboards per project/tag.
• Datasets — Collect examples → use as eval sets or training data.
• Evaluations — LLM-as-judge, embedding similarity, custom Python evaluators, offline batch eval…
• LangChain Integration — Auto-trace any LangChain/LangGraph run with env var.
• LangGraph Integration — First-class trace + eval for LangGraph agents.
• LLM Tracing — Automatic trace every LLM call + tool call + chain step.
• OpenTelemetry Export — Export traces as OTLP to Datadog/Honeycomb/etc.
• Playground — Test prompts + models inline before deploying.
• Prompt Canvas — Visual prompt editor with live test + eval.
• Prompt Hub — Public + private prompt library with versioning.
• Self-Hosted (Enterprise) — Docker + k8s deployment in your infra.
• Threads + Sessions — Group traces into conversational sessions.