Opik

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Score6.3

Rank#17 of 32

From$19/mo

Free planYes

Free trialYes

Runs onAPI, Linux, Self-hosted, Web

Summary

Opik is software for logging and evaluating the actions of applications and agents that use large language models. It captures and visualizes traces, supports annotations, and keeps audit logs, giving teams tools to investigate behavior during development, testing, and production. Evaluation includes more than 30 metrics covering outcomes such as relevance, context precision, task completion, and hallucination. For production monitoring, Opik can assess traces in real time, alert on failed criteria, and track token use and model costs. Test Suites provide pass/fail assertions; an Agent Playground supports end-to-end tests; and a Prompt Optimizer offers six algorithms. The core observability and evaluation features are open source and can run locally. Opik provides a REST API and Python client, Python and TypeScript SDKs, and integrations with more than 40 frameworks, model providers, and gateways, including LangChain, OpenAI, Google ADK, and LangGraph. Free Cloud allows up to 10 team members, 25,000 monthly spans, and 60-day retention. Pro Cloud is $19 per month.

Who it is for

Opik suits teams developing applications or agents that call an LLM and need to inspect, evaluate, and monitor their behavior. Its free plans are suited to development and testing.

What is good

More than 30 evaluation metrics
Real-time production trace evaluation and alerts
Open-source core can run locally
Integrates with more than 40 AI tools

What to know first

Free Cloud is limited to 25,000 spans monthly
Free Cloud retains data for 60 days
Pro Cloud is $19 per month

Verdict

Opik brings tracing, evaluation, testing, and production monitoring into one toolkit for LLM applications and agents. Teams can start with a free plan or run the open-source core locally; larger Cloud usage has paid limits and plans.

Opik plans and pricing

All plans

Free Cloud Free $0; Free plan Up to 10 team members · 25k spans per month · 60-day data retention comet.com · 30 Sept 2026

Open Source Free $0; Free Full AI observability and agent testing feature set · same codebase as hosted versions · self-hosted comet.com · 30 Sept 2026

Pro Cloud $19/mo $19 per month Up to 50 team members · 100k spans per month · 60-day data retention · customizable span limits and retention comet.com · 30 Sept 2026

Enterprise Not published Custom Unlimited team members · custom usage plans · flexible deployments · dedicated support and SLAs comet.com · 30 Sept 2026

Compared on AI agent observability tools

Free plan: Yescomet.com
Paid from: $19/mocomet.com

Facts

Purpose: Opik logs agent actions and provides automated evaluation workflows to find and fix errors across development, testing, and production.comet.com · 30 Sept 2026
Tracing and debugging: Opik captures and visualizes agent actions, supports trace annotation, and provides audit logs.comet.com · 30 Sept 2026
Evaluation: The product page says Opik includes more than 30 metrics for evaluating answer relevance, context precision, task completion, hallucination, and other outcomes.comet.com · 30 Sept 2026
Production monitoring: Opik can evaluate production traces in real time, alert on failed criteria, and track token usage and model costs.comet.com · 30 Sept 2026
Prompt and agent testing: Opik offers Test Suites with pass/fail assertions, an Agent Playground for end-to-end tests, and a Prompt Optimizer with six algorithms.comet.com · 30 Sept 2026
Open source: The core observability and evaluation feature set is available as open-source code that users can download and run locally.comet.com · 30 Sept 2026
Integrations: The pricing page describes integrations with more than 40 AI frameworks, model providers, and AI gateways, naming LangChain, OpenAI, Google ADK, and LangGraph as examples.comet.com · 30 Sept 2026
API and SDKs: The product includes a REST API and Python client, and the pricing page lists Python and TypeScript SDKs.comet.com · 30 Sept 2026
Free plan limits: The Free Cloud plan lists up to 10 team members, 25,000 spans per month, and 60-day data retention.comet.com · 30 Sept 2026
Pro plan limit: The Pro Cloud plan lists up to 50 team members and 100,000 spans per month, with customizable span limits and data retention periods.comet.com · 30 Sept 2026
Security and compliance: The Trust Center lists ISO 9001:2015, ISO/IEC 27001:2022, and SOC 2 Type 2 compliance for Comet.trust.comet.com · 30 Sept 2026
Enterprise security: The pricing page lists enterprise SSO and SOC 2, ISO 27001, ISO 9001, HIPAA, and GDPR compliance for the Enterprise plan.comet.com · 30 Sept 2026
Support: The pricing page lists community and self-service support across plans, email support for Pro and Enterprise, and dedicated support and SLAs for Enterprise.comet.com · 30 Sept 2026
Audience: The pricing page describes Opik as a platform for teams building applications or agents that make calls to an LLM, and says its free plans suit development and testing.comet.com · 30 Sept 2026