LangSmith vs GrowthBook

LangSmith

GrowthBook

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.

GrowthBook · 15 features

• Approval Flows — Require reviewer approval on flag changes. Enterprise.
• Audit Logs — Full change history. Exportable on Enterprise.
• Dimensions & Slicing — Break down experiment results by user dimensions.
• Edge SDK Support — Cloudflare Workers, Lambda@Edge, Fastly, Akamai EdgeWorkers, Netlify Edge.
• Experiments — A/B/n with CUPED variance reduction + sequential testing.
• Feature Flags — Boolean + string + number + JSON flags with targeting.
• Feature Reviews (PR-style) — Draft → review → approve flag changes.
• Guardrail Metrics — Auto-monitor key metrics during experiments.
• Metric Catalog — Define + reuse metrics across experiments.
• Multi-Armed Bandits — Adaptive traffic allocation. Pro+.
• Safe Rollouts — Guarded gradual rollouts with automatic rollback.
• SSO / SAML — Enterprise SSO for cloud + self-host EE.
• Sticky Bucketing — User stays in variant even after eligibility changes.
• Visual A/B Test Editor — No-code DOM editor for web experiments. Pro+.
• Warehouse Native — Connect your warehouse + run experiments against your events data.