Opik
Opik: A broad, cost-conscious stack for tracing, evaluation, prompts, monitoring, and agent debugging. Ranked #4 of 26 in LLM Observability Tools by our editors (9.1/10); pricing: Free plan; best for cost-conscious teams needing full-stack observability.
At a glance
- Editor score9.1 / 10
- PricingFree plan
- Best forCost-conscious teams needing full-stack observability
- Free planYes
- Paid from$19/mo
- LLM tracingYes
- Founded2017 · New York City, United States
- Facts checked20 Sep 2026
Where it wins
- Free self-hosted and cloud options cover core observability needs
- Traces model calls, tools, retrieval steps, and agent actions
- Tracks evaluations, prompts, human feedback, tokens, and model costs
Where it doesn't
- Enterprise pricing is custom rather than published
- Self-hosted deployment requires your own infrastructure
- Its broad scope may exceed teams needing only basic tracing
Our verdict on Opik
Opik is an open-source LLM observability and evaluation platform from Comet for teams building chatbots, retrieval-augmented generation pipelines, and multi-step agents. It records model calls, tool invocations, retrieval steps, and agent actions, giving developers a view of application behavior from development through production monitoring. The platform combines tracing with evaluations, prompt management, human feedback, and token and model cost tracking.
Its pricing structure supports both self-hosted and managed deployments. The Open Source plan is free and includes the full AI observability and agent testing feature set for teams running their own deployment. Free Cloud is also free, with agent tracing and analysis, Test Suites and assertions, and an Agent Playground. Pro Cloud costs $19 per month and adds customizable monthly span limits and data retention periods to the Free Cloud features. Enterprise adds flexible deployments, service accounts, view-only users, single sign-on, dedicated support and SLAs, and security and compliance features.
The feature depth is the main reason to consider Opik. Teams can debug agent execution through graphs and traces, run experiments with datasets, assertions, and LLM-as-a-judge metrics, version and evaluate prompts, perform online evaluations, and collect human annotation and feedback scores. Integrations span OpenAI, Anthropic, Google Gemini, AWS Bedrock, LangChain, LangGraph, LlamaIndex, CrewAI, Haystack, Ragas, LiteLLM, OpenTelemetry, Dify, Flowise, and Spring AI. Opik suits teams that want a broad observability and evaluation layer with flexible deployment choices. Teams seeking only basic request tracing may find its wider toolset unnecessary.
Your product? Our editors can test Opik in depth and publish a review, labelled as paid · from $149/mo →
Opik pricing
Opik fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $19/mo |
| LLM tracing | Yes |
| LLM evaluations | Yes |
| Prompt management | Yes |
| Agent tracing | Yes |
| Retrieval tracing | Yes |
| Token cost tracking | Yes |
| Deployment options | Both |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Compliance & security | SOC 2, ISO 27001, GDPR, HIPAA, SSO/SAML |
| Support | Email, Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 40+ integrations: OpenAI, Anthropic, Google Gemini, AWS Bedrock, LangChain, LangGraph … See all → |
| Pricing | Free plan (source) |
| Website | comet.com |
| Facts checked | 20 Sep 2026 |
Opik integrations
Opik lists 40+ integrations on its own site — the 16 named here are the ones its pages call out.
- OpenAI
- Anthropic
- Google Gemini
- AWS Bedrock
- LangChain
- LangGraph
- LlamaIndex
- CrewAI
- Haystack
- Ragas
- LiteLLM
- OpenTelemetry
- Dify
- Flowise
- Spring AI
- Semantic Kernel
Alternatives to Opik
- Arize AXBroad LLM observability with tracing, evaluations, prompts, agents, RAG, and cost tracking.9.4
- LangfuseA broad observability platform with open-source deployment and accessible paid tiers.9.3
- Arize PhoenixA free platform for tracing, evaluating, and improving LLM applications.9.2
Opik vs the competition
- Opik vs Arize AX
- Opik vs Langfuse
- Opik vs Arize Phoenix
- Opik vs W&B Weave
- Opik vs LangSmith
- Opik vs LangWatch
Compare Opik with any tool side by side →
Also Ranked In
Opik is ranked in 10 of our directories; the 6 strongest besides LLM Observability Tools.
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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Opik for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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