kitio.aiLangSmith vs Braintrust
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 $249 for Braintrust.
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
- Code and UI evals
- Experiment comparison
- CI eval gating
- Production logging
- Prompt playground
| Feature | LangSmith | Braintrust |
|---|---|---|
| Best for | Tracing, evaluation and deployment platform for LLM agents | Evaluation and observability platform for shipping reliable AI apps |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $39/mo | $249/mo |
| Free plan | Yes | Yes |
| Made by | LangChain | Braintrust |
| Based in | United States | 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 $249 for Braintrust.
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
Starter
Free
- $10 model credits/month
- 1 GB processed data
- 10k scores
- 14-day retention
Pro
$249/mo
- $100 model credits/month
- 5 GB processed data
- 50k scores
- 30-day retention, RBAC
Enterprise
Custom
- Custom retention and export
- On-prem or hosted deployment
- Premium 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
Braintrust
- Strong eval workflow
- Good for product teams
- Hybrid data option
- Pro plan is expensive
- Not open source
- Overkill for hobby projects
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 Braintrust if you want:
- Strong eval workflow
- Good for product teams
- Hybrid data option
Watch out: pro plan is expensive.
LangSmith vs Braintrust FAQ
What is the difference between LangSmith and Braintrust?
LangSmith: Tracing, evaluation and deployment platform for LLM agents. Braintrust: Evaluation and observability platform for shipping reliable AI apps. Both are models & apis tools.
Is LangSmith or Braintrust cheaper?
LangSmith has the lower starting price: about $39 a month, against $249 for Braintrust.
Do LangSmith and Braintrust have free plans?
LangSmith: Yes. Braintrust: Yes.
Who makes LangSmith?
LangSmith is made by LangChain, based in United States.
Who makes Braintrust?
Braintrust is made by Braintrust, based in United States.
Which should I choose, LangSmith or Braintrust?
Choose LangSmith if you value detailed agent traces and strong langgraph integration. Choose Braintrust if you value strong eval workflow and good for product teams.