LangSmith vs Novu
LLM observability, testing & evaluation — by LangChain
vs. Open-source notification infrastructure — workflows across email, SMS, push, chat, in-app
Pricing tiers
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
Novu
Free
10K workflow runs/mo. All channels. 20 workflows, 2 environments, 3 team members, 24h retention.
Free
Self-hosted (OSS)
Open source (MIT). Run locally or on own infrastructure. No usage limits.
$0 base (usage-based)
Pro
From $30/mo. 30K+ runs, 7-day retention, branding removal, advanced email editor.
$30/mo
Team
From $250/mo. 250K+ runs, 10 envs, 90-day retention, RBAC, 600 RPS.
$250/mo
Enterprise
Custom. 10M+ runs, HIPAA BAA, SSO/OIDC, data residency (SG/UK/AU/JP/KR), self-hosted/VPC.
Custom
Free-tier quotas head-to-head
Comparing developer on LangSmith vs free on Novu.
| Metric | LangSmith | Novu |
|---|---|---|
| retention | — | 1 days |
| workflow runs monthly | — | 10000 runs/mo |
| workflows | — | 20 workflows |
Features
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.
Novu · 15 features
- Activity Feed — Message-by-message delivery timeline.
- Chat — Slack, Microsoft Teams, Discord, Mattermost, WhatsApp, WeChat.
- Email — SendGrid, Postmark, Mailgun, AWS SES, Resend, SMTP, Plunk, Mailjet, Sparkpost, M…
- Inbox — React/Next/Vue/Angular in-app Inbox component.
- Layouts — Reusable email layouts with template nesting.
- Multi-tenancy — Per-tenant branding, templates, preferences.
- Novu Framework — Code-first workflow DSL (TypeScript) colocated with app code.
- Preferences — Per-subscriber + global notification preferences.
- Push — APNs, FCM, Expo, OneSignal, Pushpad, Pusher.
- Self-hosting — Docker Compose / Kubernetes deployment of full stack.
- SMS — Twilio, MessageBird, Plivo, Nexmo, Termii, Sendchamp, Africa's Talking, Kannel, …
- Subscribers — Subscriber profiles with channels, preferences, topics.
- Topics — Pub/sub style subscribe many users to a topic.
- Translations — i18n support for templates.
- Workflows — Code-first or visual notification workflows with steps, branches, delays.
Developer interfaces
| Kind | LangSmith | Novu |
|---|---|---|
| CLI | LangSmith CLI | Novu CLI |
| SDK | langsmith-js, langsmith-python | go-novu, @novu/api, @novu/framework, novu-java, novu-kotlin, novu-php, novu (Python), @novu/react (Inbox), novu-ruby |
| REST | LangSmith REST API | Novu REST API |
| MCP | LangSmith MCP | — |
| OTHER | LangSmith Dashboard | Outbound Webhooks, Self-hosted (Docker) |
Staxly is an independent catalog of developer platforms. Some links to LangSmith and Novu may be affiliate links — Staxly may earn a commission if you sign up through them, at no extra cost to you. Pricing is verified against vendor pages at publication time — reconfirm before buying.
Want this comparison in your AI agent's context? Install the free Staxly MCP server.