kitio.aiLangSmith vs Langtail
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. LangSmith has the lower starting price: about $39 a month, against $99 for Langtail.
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
- Prompt versioning
- Prompt testing
- Logs
- Deployment
- Radars and alerts
- Shareable apps
| Feature | LangSmith | Langtail |
|---|---|---|
| Best for | Tracing, evaluation and deployment platform for LLM agents | Prompt management and testing for product teams |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $39/mo | $99/mo |
| Free plan | Yes | Yes |
| Made by | LangChain | Langtail |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
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Pricing compared
LangSmith has the lower starting price: about $39 a month, against $99 for Langtail.
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
3 plans
Free
Free
- Unlimited users
- 2 prompts or assistants
- 1,000 logs per month
- 30 days data retention
Pro
$99/mo
- 1 user
- 20 prompts or assistants
- Unlimited logs
- 90 days data retention
Team
$499/mo
- 10 users
- Unlimited prompts or assistants
- Radars and alerts
- Dedicated support
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
Langtail
- Free plan with unlimited users
- Combines testing and logging
- Version control for prompts
- Free plan allows only 2 prompts
- Team plan costs $499 a month
- Prices exclude VAT
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 Langtail if you want:
- Free plan with unlimited users
- Combines testing and logging
- Version control for prompts
Watch out: free plan allows only 2 prompts.
LangSmith vs Langtail FAQ
What is the difference between LangSmith and Langtail?
LangSmith: Tracing, evaluation and deployment platform for LLM agents. Langtail: Prompt management and testing for product teams. Both are models & apis tools.
Is LangSmith or Langtail cheaper?
LangSmith has the lower starting price: about $39 a month, against $99 for Langtail.
Do LangSmith and Langtail have free plans?
LangSmith: Yes. Langtail: Yes.
Who makes LangSmith?
LangSmith is made by LangChain, based in United States.
Who makes Langtail?
Langtail is made by Langtail.
Which should I choose, LangSmith or Langtail?
Choose LangSmith if you value detailed agent traces and strong langgraph integration. Choose Langtail if you value free plan with unlimited users and combines testing and logging.