Notion vs LangSmith
All-in-one workspace — docs, wikis, databases, projects, AI
vs. LLM observability, testing & evaluation — by LangChain
Pricing tiers
Notion
Free
$0. Unlimited blocks for personal use, 5MB file uploads, 7-day version history. Max 10 collaborators.
Free
Notion AI (add-on)
$8/user/mo. Add AI to Plus. Free on Business and above.
$8/mo
Plus
$10/user/mo annual ($12/mo). Unlimited blocks for teams, unlimited file uploads, 30-day history.
$10/mo
Business
$15/user/mo annual ($18/mo). SAML SSO, private teamspaces, bulk export, 90-day history, Notion AI included.
$15/mo
Enterprise
$25/user/mo (est). SCIM, audit log, unlimited history, dedicated success manager.
$25/mo
LangSmith
Developer (Free)
Free forever. 5,000 traces/month. 14-day retention. 1 seat. Basic evaluations.
Free
Plus
$39/seat/month. 10k base traces included ($2.50 per 1k overage). Full evaluations, custom dashboards, email support.
$39/mo
Enterprise
Custom. Self-host option, SSO, custom retention, dedicated support.
Custom
Free-tier quotas head-to-head
Comparing free on Notion vs developer on LangSmith.
| Metric | Notion | LangSmith |
|---|---|---|
| No overlapping quota metrics for these tiers. | ||
Features
Notion · 16 features
- Databases — Relational data with views.
- Database Views — Table, board, gallery, calendar, timeline, list.
- Desktop Apps — Native Mac + Windows.
- Docs — Wiki + docs with rich editor.
- Formulas 2.0 — JS-like expressions.
- Granular Permissions — Per-page + teamspace ACLs.
- iOS + Android Apps — Native mobile.
- Notion AI — AI assist for writing + Q&A.
- Notion Calendar — Native calendar (ex-Cron).
- Notion Mail — Email client integrated.
- Relations + Rollups — Cross-DB linking + aggregations.
- REST API — Integrations + automations.
- Sync Databases — Pull external sources.
- Teamspaces — Isolated areas per team.
- Template Gallery — 10,000+ community templates.
- Widgets + Embeds — Third-party embeds.
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.
Developer interfaces
| Kind | Notion | LangSmith |
|---|---|---|
| CLI | — | LangSmith CLI |
| SDK | @notionhq/client | langsmith-js, langsmith-python |
| REST | Notion REST API | LangSmith REST API |
| MCP | Notion MCP (official) | LangSmith MCP |
| OTHER | Notion AI, Notion Apps, OAuth 2.0 (public) | LangSmith Dashboard |
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