kitio.aiOpik vs Respan
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Opik starts at $19/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
- Tracing and spans
- Evaluation metrics
- Agent optimizer
- Guardrails
- Framework integrations
- One API for 1,000+ models
- Automatic model fallbacks
- Response caching
- Agent tracing
- LLM-as-judge evaluators
- Red-team testing
| Feature | Opik | Respan |
|---|---|---|
| Best for | Comet's open-source platform for LLM tracing and evaluation | LLM gateway with tracing, monitoring and automated evals |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $19/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Comet | Respan |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Opik starts at $19/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
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
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
Opik
- Free and self-hostable
- Automatic prompt optimization
- Many integrations
- Smaller community than Langfuse
- Hosted plan limits vary
- Docs split with Comet ML
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 Opik if you want:
- Free and self-hostable
- Automatic prompt optimization
- Many integrations
Watch out: smaller community than langfuse.
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.
Opik vs Respan FAQ
What is the difference between Opik and Respan?
Opik: Comet's open-source platform for LLM tracing and evaluation. Respan: LLM gateway with tracing, monitoring and automated evals. Both are models & apis tools.
Is Opik or Respan cheaper?
Opik starts at $19/mo and Respan starts at See pricing page. Check both pricing pages for current plans.
Do Opik and Respan have free plans?
Opik: Yes. Respan: Yes.
Who makes Opik?
Opik is made by Comet, based in United States.
Who makes Respan?
Respan is made by Respan.
Which should I choose, Opik or Respan?
Choose Opik if you value free and self-hostable and automatic prompt optimization. Choose Respan if you value routing and evals in one product and generous free tier with 100k logs.