Does Comet have a free plan?

Yes. Comet offers both a free managed cloud tier (no credit card required, supports up to 10 team members with a monthly span limit and 60-day retention) and a fully open-source self-hosted version of Opik with no usage caps.

What is the difference between Comet and Opik?

Opik is Comet's open-source product focused on LLM tracing, evaluation, and production observability. Comet as a whole also includes a traditional MLOps platform for experiment tracking, model versioning, and hyperparameter optimization — Opik is the LLM/agent layer on top of that foundation.

What AI frameworks and tools does Comet integrate with?

Comet integrates with LangChain, LlamaIndex, OpenAI, Vertex AI, PyTorch, TensorFlow, Keras, and Scikit-learn, among others. Any custom LLM implementation can also be connected through its SDK.

How quickly can a developer get started?

Onboarding is designed to take minutes — developers add a few lines of code to their existing workflow using Comet's SDK and traces start appearing in the dashboard immediately. Advanced evaluation pipelines and custom metrics take longer to configure but are well-documented.

Is Comet suitable for solo founders or only larger engineering teams?

Comet works well for solo founders and small teams on the free tier, scaling up through paid plans as team size and usage grow. The open-source self-hosted path is also popular among early-stage startups looking to avoid vendor lock-in while still getting full observability.

Reviewed · Updated 2026-06-21

Comet

End-to-end AI evaluation platform for tracing, testing, and optimizing LLM applications and autonomous agents at any scale.

Reviewed by the Conversion Gems editorial team · 2026-06-21

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Pricing

Freemium

Best for

AI engineers and startup founders who need full visibility into how their LLM apps and agents behave, with automated evaluation to catch regressions before they reach users

Community ratings

1.6/ 5 aggregate · across 2 sources

4.75+ reviews

Trustpilot

1.5180+ reviews

Third-party ratings shown verbatim; aggregate weighted by review volume.

What it really is

Comet — an AI developer platform offering Opik for LLM observability and evaluation, and MLOps for experiment tracking.

Our take

Comet provides a comprehensive suite for AI development, combining Opik's LLM observability with MLOps' experiment tracking. The platform offers flexible pricing, including a generous free tier and an open-source option for self-hosting, making it accessible for teams of various sizes. Notably, Comet's pricing model is more affordable than some competitors, with the Pro tier at $19 per month, offering expanded usage for growing teams.

Best for

AI engineers

Data scientists

ML researchers

Not good for

Non-technical users

Teams requiring extensive customer support

Organizations needing highly specialized AI tools

Friction report

Time to value

Fast: Quick setup with immediate access to core features.

Scale breakpoint

Pro plan limits at 10 users; larger teams require Enterprise plan.

Walled garden

Low: Open-source option allows for customization and integration.

Frequently Asked Questions

Alternatives

Step up

Enterprise plan for larger teams and advanced features.

Lighter alternative

Open-source self-hosted version for full control.

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