kitio.aiLangfuse vs Braintrust
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Langfuse has the lower starting price: about $29 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
- LLM tracing
- OpenTelemetry support
- Prompt management
- Evaluations and datasets
- Self-hosting
- Code and UI evals
- Experiment comparison
- CI eval gating
- Production logging
- Prompt playground
| Feature | Langfuse | Braintrust |
|---|---|---|
| Best for | Open-source LLM observability, prompt management and evals | Evaluation and observability platform for shipping reliable AI apps |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $29/mo | $249/mo |
| Free plan | Yes | Yes |
| Made by | ClickHouse | Braintrust |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
|
Pricing compared
Langfuse has the lower starting price: about $29 a month, against $249 for Braintrust.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Hobby
Free
- Free cloud plan
- Limited usage and history
Core
$29/mo
- 100k units included, $8/100k extra
- 90 days data access
- Unlimited users
Pro
$199/mo
- 3 years data access
- High rate limits
- SOC2 and ISO27001 reports
Enterprise
$2499/mo
- Audit logs and SCIM API
- Uptime and support SLA
- Named support engineer
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
Langfuse
- Free to self-host
- No seat-based fees
- Works with any framework
- Self-hosting needs ops work
- Advanced features on paid tiers
- UI can feel dense
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 Langfuse if you want:
- Free to self-host
- No seat-based fees
- Works with any framework
Watch out: self-hosting needs ops work.
Choose Braintrust if you want:
- Strong eval workflow
- Good for product teams
- Hybrid data option
Watch out: pro plan is expensive.
Langfuse vs Braintrust FAQ
What is the difference between Langfuse and Braintrust?
Langfuse: Open-source LLM observability, prompt management and evals. Braintrust: Evaluation and observability platform for shipping reliable AI apps. Both are models & apis tools.
Is Langfuse or Braintrust cheaper?
Langfuse has the lower starting price: about $29 a month, against $249 for Braintrust.
Do Langfuse and Braintrust have free plans?
Langfuse: Yes. Braintrust: Yes.
Who makes Langfuse?
Langfuse is made by ClickHouse, based in United States.
Who makes Braintrust?
Braintrust is made by Braintrust, based in United States.
Which should I choose, Langfuse or Braintrust?
Choose Langfuse if you value free to self-host and no seat-based fees. Choose Braintrust if you value strong eval workflow and good for product teams.