kitio.aiLangSmith vs Lunary
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Lunary has the lower starting price: about $20 a month, against $39 for LangSmith.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Agent tracing
- Datasets and evaluators
- Prompt hub
- Agent deployment
- Online monitoring
- LLM request logging
- Chatbot analytics
- Prompt versioning
- Human reviews
- AI playground
- CSV and JSONL export
| Feature | LangSmith | Lunary |
|---|---|---|
| Best for | Tracing, evaluation and deployment platform for LLM agents | Observability, prompt management and evals for LLM apps |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $39/mo | $20/mo |
| Free plan | Yes | Yes |
| Made by | LangChain | Lunary |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
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Pricing compared
Lunary has the lower starting price: about $20 a month, against $39 for LangSmith.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Developer
Free
- 1 seat
- 5k base traces / month, then pay as you go
- Community support
Plus
$39/mo
- Per seat
- 10k base traces / month, then pay as you go
- Access to Deployment and Engine
- Unlimited seats
Enterprise
Custom
- Self-hosted and hybrid deployment
- Custom SSO, ABAC and RBAC
- Support SLA
2 plans
Team
$20/mo
- Per user
- 50,000 events per month
- 300 playground queries per month
- Unlimited projects, 1 year history
Enterprise
Custom
- Custom limits
- Plans for larger teams
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
LangSmith
- Detailed agent traces
- Strong LangGraph integration
- Works with any framework
- Per-seat pricing adds up
- Trace retention costs extra
- Self-hosting is enterprise-only
Lunary
- Prompts and traces in one tool
- Self-hosting option
- Clear per-seat pricing
- Cloud workspace requires payment up front
- Team plan caps at 10 seats
- Extra events and queries cost more
Which one should you choose?
Choose LangSmith if you want:
- Detailed agent traces
- Strong LangGraph integration
- Works with any framework
Watch out: per-seat pricing adds up.
Choose Lunary if you want:
- Prompts and traces in one tool
- Self-hosting option
- Clear per-seat pricing
Watch out: cloud workspace requires payment up front.
LangSmith vs Lunary FAQ
What is the difference between LangSmith and Lunary?
LangSmith: Tracing, evaluation and deployment platform for LLM agents. Lunary: Observability, prompt management and evals for LLM apps. Both are models & apis tools.
Is LangSmith or Lunary cheaper?
Lunary has the lower starting price: about $20 a month, against $39 for LangSmith.
Do LangSmith and Lunary have free plans?
LangSmith: Yes. Lunary: Yes.
Who makes LangSmith?
LangSmith is made by LangChain, based in United States.
Who makes Lunary?
Lunary is made by Lunary.
Which should I choose, LangSmith or Lunary?
Choose LangSmith if you value detailed agent traces and strong langgraph integration. Choose Lunary if you value prompts and traces in one tool and self-hosting option.