kitio.aiLangfuse vs Confident AI
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 $200 for Confident AI.
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
- DeepEval metrics
- Pytest integration
- Dataset management
- Regression testing
- Production monitoring
| Feature | Langfuse | Confident AI |
|---|---|---|
| Best for | Open-source LLM observability, prompt management and evals | LLM evaluation platform built on the open-source DeepEval framework |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $29/mo | $200/mo |
| Free plan | Yes | Yes |
| Made by | ClickHouse | Confident AI |
| 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 $200 for Confident AI.
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
4 plans
Free
Free
- LLM unit and regression testing
- LLM tracing
- 1 GB-month of trace spans
Starter
$200/mo
- No-code eval workflows
- Unlimited user seats
- Up to 5 projects
- 5 GB-months of trace spans
Team
$2000/mo
- Metric and dataset versioning
- Custom RBAC
- Unlimited projects
- 75 GB-months of trace spans
Enterprise
Custom
- On-prem deployment
- Custom data residency
- AI red teaming and governance
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
Confident AI
- Popular open-source base
- Unit-test style workflow
- Many built-in metrics
- LLM-judge metrics add cost
- Cloud features need a plan
- Small company
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 Confident AI if you want:
- Popular open-source base
- Unit-test style workflow
- Many built-in metrics
Watch out: llm-judge metrics add cost.
Langfuse vs Confident AI FAQ
What is the difference between Langfuse and Confident AI?
Langfuse: Open-source LLM observability, prompt management and evals. Confident AI: LLM evaluation platform built on the open-source DeepEval framework. Both are models & apis tools.
Is Langfuse or Confident AI cheaper?
Langfuse has the lower starting price: about $29 a month, against $200 for Confident AI.
Do Langfuse and Confident AI have free plans?
Langfuse: Yes. Confident AI: Yes.
Who makes Langfuse?
Langfuse is made by ClickHouse, based in United States.
Who makes Confident AI?
Confident AI is made by Confident AI, based in United States.
Which should I choose, Langfuse or Confident AI?
Choose Langfuse if you value free to self-host and no seat-based fees. Choose Confident AI if you value popular open-source base and unit-test style workflow.