Comet vs Weights & Biases Pricing (2026)
How do these two stack up on price? Here's what each one costs, what you get, and where the value sits.
| Comet pricing | Weights & Biases pricing | |
|---|---|---|
| Starts at | $19/mo | $60/mo |
| Number of plans | 4 | 3 |
| Free plan | ||
| Free trial | ||
| Pricing model | hybrid | hybrid |
Price is one row. To weigh the features too, use our feature comparison template →
Open Source
- Full AI observability & agent testing feature set
- True OSS: same codebase as the hosted versions
- Agent tracing & analysis
- Test Suites & assertions
- Agent Playground
Free Cloud
- Up to 10 team members
- 25k spans per month
- 60-day data retention
- Agent tracing & analysis
- Test Suites & assertions
- Agent Playground
- Ollie coding harness trial
Pro Cloud
Popular- Up to 50 team members
- 100k spans per month
- 60-day data retention
- Customizable monthly span limits
- Customizable data retention periods
Enterprise
- Unlimited team members
- Custom usage plans
- Flexible deployments
- Service accounts and view-only users
- Single sign-on
- Dedicated support and SLAs
- SOC 2, ISO 27001, ISO 9001, HIPAA, and GDPR compliance
Free
- AI application evaluations
- AI application tracing
- AI application scorers
- AI model experiment tracking
- AI assets registry & lineage tracking
- Community Support
Pro
- Unlimited teams for collaboration
- Team-based access controls
- Service Accounts
- Priority email & chat support
- CI/CD automations
- Slack and email alerts
Enterprise
- Single tenant option with choice of region
- HIPAA compliant option
- Secure private connectivity
- Customer-managed encryption key
- Single Sign On
- Automated user provisioning
- Custom roles
- Audit logs
- Enterprise support package
Comet vs Weights & Biases FAQ
- Which one is cheaper?
- Comet starts lower at $19/mo, compared to $60/mo for Weights & Biases.
- Can I use either one for free?
- Both offer free plans, so you can try each without paying. Start with whichever fits your workflow better and upgrade when you hit the limits.
- How do they charge?
- Both use a hybrid model, so the comparison is straightforward — it comes down to features and limits at each price point.
- Which one is a better deal?
- Depends on what you need. Comet: At $19/mo for Pro, Comet undercuts most enterprise-first MLOps and LLM observability tools that gate everything behind a sales call — this is a land-and-expand play aimed at developers and small teams who'd otherwise bounce off a 'contact us' wall. Weights & Biases: At $60/mo for Pro, W&B sits mid-market compared to pricier MLOps suites but well above lightweight experiment trackers that are free or cheap indefinitely. They're clearly chasing funded startups and mid-size ML teams who've outgrown free tooling but aren't yet enterprise-scale — the 50-employee cap all but guarantees they funnel bigger fish straight into custom Enterprise deals.
Still deciding? See the best Comet alternatives or the best Weights & Biases alternatives, ranked with verified pricing.
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