kitio.aiOpik vs PromptLayer
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 $49 for PromptLayer.
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
- Prompt registry
- Visual prompt editor
- Evaluation pipelines
- Request logging
- Release labels
| Feature | Opik | PromptLayer |
|---|---|---|
| Best for | Comet's open-source platform for LLM tracing and evaluation | Prompt management and evals for teams where non-engineers edit prompts |
| Category | Models & APIs | Models & APIs |
| Pricing model | Freemium | Freemium |
| Starting price | $19/mo | $49/mo |
| Free plan | Yes | Yes |
| Made by | Comet | PromptLayer |
| 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 $49 for PromptLayer.
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
4 plans
Free
Free
- 5 users
- 2.5K requests/month
- 1 workspace
Pro
$49/mo
- Unlimited workspaces and playgrounds
- 150MB max per dataset
- Overage $0.003 per request
Team
$500/mo
- 25 users
- 100K+ requests/month
- Overage $0.002 per request
Enterprise
Custom
- Custom limits
- RBAC and deployment approvals
- HIPAA with BAA
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
PromptLayer
- Friendly for non-engineers
- Simple prompt versioning
- Backtests on real traffic
- Less depth on agent tracing
- Limits on lower plans
- Smaller ecosystem
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 PromptLayer if you want:
- Friendly for non-engineers
- Simple prompt versioning
- Backtests on real traffic
Watch out: less depth on agent tracing.
Opik vs PromptLayer FAQ
What is the difference between Opik and PromptLayer?
Opik: Comet's open-source platform for LLM tracing and evaluation. PromptLayer: Prompt management and evals for teams where non-engineers edit prompts. Both are models & apis tools.
Is Opik or PromptLayer cheaper?
Opik has the lower starting price: about $19 a month, against $49 for PromptLayer.
Do Opik and PromptLayer have free plans?
Opik: Yes. PromptLayer: Yes.
Who makes Opik?
Opik is made by Comet, based in United States.
Who makes PromptLayer?
PromptLayer is made by PromptLayer, based in United States.
Which should I choose, Opik or PromptLayer?
Choose Opik if you value free and self-hostable and automatic prompt optimization. Choose PromptLayer if you value friendly for non-engineers and simple prompt versioning.