kitio.aiLangfuse vs Opik
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Opik has the lower starting price: about $19 a month, against $29 for Langfuse.
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
- Tracing and spans
- Evaluation metrics
- Agent optimizer
- Guardrails
- Framework integrations
| Feature | Langfuse | Opik |
|---|---|---|
| Best for | Open-source LLM observability, prompt management and evals | Comet's open-source platform for LLM tracing and evaluation |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $29/mo | $19/mo |
| Free plan | Yes | Yes |
| Made by | ClickHouse | Comet |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
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Pricing compared
Opik has the lower starting price: about $19 a month, against $29 for Langfuse.
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
Open Source
Free
- Self-hosted
- Full observability feature set
- Unlimited spans
Free Cloud
Free
- Up to 10 team members
- 25k spans per month
- 60-day data retention
Pro Cloud
$19/mo
- Up to 50 team members
- 100k spans per month
- $5 per extra 100k spans
Enterprise
Custom
- Unlimited team members
- Flexible deployments
- Single sign-on
- 2-hour response SLA
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
Opik
- Free and self-hostable
- Automatic prompt optimization
- Many integrations
- Smaller community than Langfuse
- Hosted plan limits vary
- Docs split with Comet ML
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 Opik if you want:
- Free and self-hostable
- Automatic prompt optimization
- Many integrations
Watch out: smaller community than langfuse.
Langfuse vs Opik FAQ
What is the difference between Langfuse and Opik?
Langfuse: Open-source LLM observability, prompt management and evals. Opik: Comet's open-source platform for LLM tracing and evaluation. Both are models & apis tools.
Is Langfuse or Opik cheaper?
Opik has the lower starting price: about $19 a month, against $29 for Langfuse.
Do Langfuse and Opik have free plans?
Langfuse: Yes. Opik: Yes.
Who makes Langfuse?
Langfuse is made by ClickHouse, based in United States.
Who makes Opik?
Opik is made by Comet, based in United States.
Which should I choose, Langfuse or Opik?
Choose Langfuse if you value free to self-host and no seat-based fees. Choose Opik if you value free and self-hostable and automatic prompt optimization.