Comet
comet.com
Experiment management and LLM evaluation platform.
Quick Information
- Category:
- MLOps & Infrastructure
- Pricing:
- Freemium
- Platforms:
- Web, Python, Self-hosted
- Free Plan:
- Yes
- API Available:
- Yes
- Last Verified:
- October 2026
What Is Comet?
Comet is an experiment management and LLM evaluation platform, with Opik as its open-source LLM observability and evaluation product. No official comet.com pricing page appeared, and the aggregator results disagree on the Pro price. Opik's open-source edition is free, one source describing it as Apache 2.0 licensed and another saying self-hosted deployments are free regardless of volume. The free cloud tier is reported at $0 with 10 team members, 25,000 monthly spans and 60-day retention in a May to June 2026 listing, while another source reports unlimited team members, and a tracker says Comet cut the team members on Opik Free Cloud from unlimited to 10 between March 23 and April 14, 2026, which is consistent with the 10-member figure.
Opik Pro is listed at $19 a month with up to 50 team members and 100,000 monthly spans in one listing, while other sources cite $39 a month for 100,000 spans with extended retention and overage of $5 per additional 100,000 spans, and one says all plans include unlimited team members. Enterprise is custom with SSO, SLAs, dedicated support and custom retention. Academics reportedly get Pro access free. Comet ML, the experiment-tracking product, is priced separately: one source lists Free at $0 and Pro (MLOps) at $39 per user a month, plus higher Teams tiers, and another reports a free tier limited to one platform user. Do not confuse Comet with Perplexity's Comet browser, which has its own plans.
Comet suits ML teams that want experiment tracking and LLM evals in one vendor, with a self-host option. Compare ClearML, Arize AI and ZenML. Browse the MLOps & Infrastructure tools directory for more.
What Can You Use Comet For?
Experiment tracking
ML runs.
LLM evaluation and observability
Opik.
Comet Features
- Span-based Opik pricing — Monthly spans.
- Academic access — Pro free for researchers per sources.
- Free-tier changes — Team cap cut in 2026.
Who Is Comet For?
- ML teams — Experiment tracking.
- LLM app developers — Evaluation.
Comet Pros & Limitations
What We Like
- Open-source Opik
- Free tiers
- Tracking plus evals
Limitations
- Pro price conflicts across sources
- Free tier limits tightened
- Easily confused with Perplexity's Comet
Comet Pricing
| Plan | Price | Main Features |
|---|---|---|
| Opik open source | Free (Apache 2.0 per one source) | Self-hosted; infrastructure costs yours |
| Opik Free Cloud | $0 | 10 team members, 25,000 spans a month, 60-day retention (listing) |
| Opik Pro | $19/month (one listing) or $39/month (others) | 100,000 spans; overage $5 per extra 100,000 |
| Comet ML Pro (MLOps) | $39/user/month | Separate from Opik |
| Enterprise | Custom | SSO, SLA, dedicated support |
Pricing was last verified October 2026. Check the official website for the latest pricing.
AI Listing Jungle Ranking
- Global Rank:
- #126
- Overall Score:
- 80.4/100
- Monthly Users:
- –
- Rank Change:
- ▲ 1423
This ranking reflects AI Listing Jungle's own independent scoring methodology and is not an endorsement by Comet or its company. How Our Rankings Work
Frequently Asked Questions
Is Opik free?
The open-source version is free; a free cloud tier exists.
How much is Opik Pro?
$19 or $39 a month depending on source.
How much is Comet ML Pro?
About $39 per user a month.
Is it the Perplexity browser?
No.
Our Take
Comet covers tracking and LLM evals.
Check the Pro price on its site.
Comet Alternatives
Comet Comparisons
Ready to try Comet?
Visit the official website to get started.
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