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 | Weights & Biases | |
|---|---|---|
| Starts at | $19/mo | $60/mo |
| Number of plans | 4 | 5 |
| Free plan | ||
| Free trial | ||
| Pricing model | usage-based | hybrid |
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
Personal
- 1 user seat
- Experiment tracking
- Registry & lineage tracking
- Run a W&B server locally on any machine with Docker and Python installed
- For personal projects only. Corporate use is not allowed.
Advanced Enterprise
- Flexible deployment options
- HIPAA compliant option
- Secure private connectivity
- Customer-managed encryption key
- Single Sign On
- Automated user provisioning
- Custom roles
- Audit logs
- Enterprise support package
- Run a W&B server locally on your own infrastructure with a free enterprise trial license
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?
- Different approach here. Comet uses usage-based pricing, while Weights & Biases goes with hybrid. That changes the math depending on your team size and usage.
- Which one is a better deal?
- Depends on what you need. Comet: At $19/mo entry, they're positioning as the accessible alternative to heavier MLOps platforms — clearly going after teams that find tools like Weights & Biases or Arize too expensive or too complex for pure LLM tracing use cases. The academic free Pro tier signals they're also playing a long game on developer mindshare. Weights & Biases: At $60/mo for Pro, they're accessible for indie teams and startups, but the real competition is MLflow (open-source, self-hosted, free) and Comet ML — W&B is positioning as the polished, cloud-native option worth paying for when you're tired of maintaining your own infra. They're mid-market on price but premium on brand within the MLOps space.
Still deciding? See the best Comet alternatives or the best Weights & Biases alternatives, ranked with verified pricing.
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