Comet vs Weaviate 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 | Weaviate pricing | |
|---|---|---|
| Starts at | $19/mo | $45/mo |
| Number of plans | 4 | 3 |
| Free plan | ||
| Free trial | — | |
| Pricing model | hybrid | usage-based |
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
Flex
PopularPremium
Comet vs Weaviate FAQ
- Which one is cheaper?
- Comet starts lower at $19/mo, compared to $45/mo for Weaviate.
- 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 hybrid pricing, while Weaviate goes with usage-based. 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 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. Weaviate: Sitting in the middle of the vector DB pack — not as aggressively free-tier-generous as some open-source-first competitors, but far cheaper to start than enterprise-only vector platforms, so they're courting teams who want managed infra without an enterprise sales call.
Still deciding? See the best Comet alternatives or the best Weaviate alternatives, ranked with verified pricing.
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