kitio.aiAdded Oct 28, 2026
Opik
Freemium · $19/moComet's open-source platform for LLM tracing and evaluation
What is Opik?
Opik is an open-source tool from Comet for tracing, evaluating and monitoring LLM applications and agents. Developers can self-host it for free or use Comet's hosted version, and it integrates with common frameworks like LangChain and LlamaIndex.
Opik logs traces and spans, runs evaluations with built-in and custom metrics, and includes an agent optimizer that tunes prompts automatically. Guardrails can screen inputs and outputs in production.
The open-source version is Apache 2.0 licensed and runs with Docker or Kubernetes. Comet's cloud has a free tier and paid plans for teams that want hosting, more retention and support.
Features
- Tracing and spans
- Evaluation metrics
- Agent optimizer
- Guardrails
- Framework integrations
Tags
Releases
+ Submit new release- Listed
Opik was added to the directory.
Organization
Comet
🇺🇸 United States
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Freemium
- Paid options from
- $19/mo
- Billing frequency
- Monthly
Opik 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. Plans change often, so confirm on the Opik site.Official pricing
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Pros and cons
Pros
- Free and self-hostable
- Automatic prompt optimization
- Many integrations
Cons
- Smaller community than Langfuse
- Hosted plan limits vary
- Docs split with Comet ML
Prompts & results
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Reviews
Q&A
What is Opik?
Opik is an open-source tool from Comet for tracing, evaluating and monitoring LLM applications and agents. Developers can self-host it for free or use Comet's hosted version, and it integrates with common frameworks like LangChain and LlamaIndex.
How much does Opik cost?
Opik is freemium, with paid plans from $19/mo.
Is there a free version of Opik?
Yes. Opik has a free plan, and paid plans add more usage and features.
What are the main features of Opik?
Tracing and spans, Evaluation metrics, Agent optimizer, Guardrails, Framework integrations.
Who makes Opik?
Opik is made by Comet.
What are the best alternatives to Opik?
Popular alternatives include Langfuse, Arize AI, Respan.