kitio.aiLangfuse vs Respan
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Langfuse starts at $29/mo and Respan starts at See pricing page. Check both pricing pages for current plans.
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
- One API for 1,000+ models
- Automatic model fallbacks
- Response caching
- Agent tracing
- LLM-as-judge evaluators
- Red-team testing
| Feature | Langfuse | Respan |
|---|---|---|
| Best for | Open-source LLM observability, prompt management and evals | LLM gateway with tracing, monitoring and automated evals |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $29/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | ClickHouse | Respan |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Langfuse starts at $29/mo and Respan starts at See pricing page. Check both pricing pages for current plans.
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
Free
Free
- 100k logs
- 1k scores
- 5 datasets
- 2 evaluators
Team
$199/mo billed yearly
- Unlimited datasets and evaluators
- Unlimited prompts
- SOC 2 report
- Private Slack channel
Enterprise
Contact sales
- Custom packages
- Custom SLAs
- Dedicated support engineer
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
Respan
- Routing and evals in one product
- Generous free tier with 100k logs
- Open-source gateway
- Team plan is billed yearly
- Extra logs and seats cost more
- HIPAA compliance is a paid add-on
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 Respan if you want:
- Routing and evals in one product
- Generous free tier with 100k logs
- Open-source gateway
Watch out: team plan is billed yearly.
Langfuse vs Respan FAQ
What is the difference between Langfuse and Respan?
Langfuse: Open-source LLM observability, prompt management and evals. Respan: LLM gateway with tracing, monitoring and automated evals. Both are models & apis tools.
Is Langfuse or Respan cheaper?
Langfuse starts at $29/mo and Respan starts at See pricing page. Check both pricing pages for current plans.
Do Langfuse and Respan have free plans?
Langfuse: Yes. Respan: Yes.
Who makes Langfuse?
Langfuse is made by ClickHouse, based in United States.
Who makes Respan?
Respan is made by Respan.
Which should I choose, Langfuse or Respan?
Choose Langfuse if you value free to self-host and no seat-based fees. Choose Respan if you value routing and evals in one product and generous free tier with 100k logs.