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Comet ML (Comet / Opik) — artifact + dataset management
www.comet.comMlops artifactsstorage/comet-ml-artifact-dataset-managementJSONcomparereport an errorprovider JSON
- Free allowance
- No storage allowance at all on the free tier.
- Verdict
- fails: quotathe free allowance is too small to matter
- Cost
- free tier
- Identity
- emailno card, no phone
- Binding limit
- retention-clampedRetention is the killer: 60 days
- Evidence
- reported2 sources; a third party said so
- Freshness
- stale on 2026-11-05checked 2026-10-21 (inherited); stale on 2026-11-05
| Free tier | No storage allowance at all on the free tier. The free cloud plan is metered in spans, not bytes: 'Up to 10 team members · 25k spans per month · 60-day data retention'. Artifact/dataset management is a paid-MLOps feature; the free plan is the Opik observability product with a 60-day retention clamp. unit mixed; metered on stored-bytes |
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| Price | none stated |
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| Limits | - retention-clamped (binding) Retention is the killer: 60 days source
25k spans/month, 10 team members, 60-day data retention on Free. Retention is the killer: 60 days is a hard clamp, so this cannot hold an archive even if bytes were free. |
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| Identity | email email; academic Pro requires institutional verification. |
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| Egress | Not applicable — there is no free storage pool to egress from. |
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| Per-object cap | not stated |
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| Retention | The free cloud plan is metered in spans, not bytes: 'Up to 10 team members · 25k spans per month · 60-day data retention' (60 days) |
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| Interface | rest rest |
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| Tooling | comet_ml Python SDK (log_artifact, log_dataset), plus Opik's own SDK. Self-hostable: github.com/comet-ml/opik is open source, which is the only unlimited path — on your own disks. |
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| Composes with | None. With no free byte allowance, multiplying accounts multiplies zero. |
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| Reliability | Stable vendor. |
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| Parsed numbers | |
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Evidence 2
| date | source | what it proved |
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| 2026-10-21 | www.comet.com/site/pricing/ | read live: Free Cloud '$0 ... Up to 10 team members · 25k spans per month · 60-day data retention'; Pro Cloud '$19 ... 100k spans per month · 60-day data retention' |
| 2026-10-21 | www.comet.com/site/pricing/ | read live: 'Our MLOps platform is designed for teams building and training machine learning models, with tools for experiment tracking, dataset management, model versioning' — i.e. dataset management is the MLOps product, not the free Opik one |
More fields 1
| dead end | {"failure_class": "retention","why": "No storage allowance at all on the free tier. The free cloud plan is metered in spans, not bytes: 'Up to 10 team members · 25k spans per month · 60-day data retention'. Artifact/dataset management is a paid-MLOps feature; the free plan is the Opik observability product with a 60-day retention clamp.","retry_when": null,"first_recorded": "2026-10-21"} |
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Unknown values 3
- per object cap notes: the field may be stated in a source that was not read
- per object cap stated: the field may be stated in a source that was not read
- retention notes: the field may be stated in a source that was not read