Clerk vs LangSmith

Clerk

LangSmith

Clerk · 15 features

• Account Portal — Hosted sign-in/user profile pages at accounts.yourapp.com — zero UI code, fully …
• Bot Protection — Cloudflare Turnstile CAPTCHA integrated into sign-up.
• Clerk Billing — Built-in Stripe-powered billing: subscriptions, plans, proration — ties directly…
• Enterprise SSO (SAML/OIDC) — SAML and OIDC for enterprise customers. Per-domain connection. Pro+ (1 included)…
• Impersonation — Act as a user from dashboard to debug. Logged.
• JWT Templates — Custom JWT issuance for third-party backends (Supabase, Hasura, Firebase, Convex…
• Machine Tokens (M2M) — API keys and machine tokens for service-to-service auth in addition to user sess…
• Multi-Factor Auth — TOTP (authenticator apps), SMS OTP, backup codes. Forced or optional per user.
• Organizations (B2B) — Multi-tenant orgs with roles, permissions, invitations, domain allowlist, and pe…
• Passkeys (WebAuthn) — Passwordless passkey sign-in with per-device biometrics.
• Prebuilt Components — Drop-in React components: <SignIn/>, <SignUp/>, <UserButton/>, <OrganizationSwit…
• Sessions — Server-side session tokens. Sliding expiration by default; configurable absolute…
• User Management — Full user CRUD, metadata (public/private/unsafe), email/phone verification, ban/…
• Waitlist Mode — Collect sign-ups before opening the app. Approve waitlist entries to activate ac…
• Webhooks — Events: user.created/updated/deleted, session.created, organization.* — delivere…

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.