Comet vs Langfuse 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 | Langfuse pricing | |
|---|---|---|
| Starts at | $19/mo | $29/mo |
| Number of plans | 4 | 4 |
| 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
Hobby
- All platform features (with limits)
- 50k units / month included
- 30 days data access
- 2 users
- Community support via GitHub
Core
- Everything in Hobby
- 100k units / month included, additional: $8/100k units. Lower with volume (pricing calculator)
- 90 days data access
- Unlimited users
- In-app support
Pro
- Everything in Core
- 100k units / month included, additional: $8/100k units. Lower with volume (pricing calculator)
- 3 years data access
- Data retention management
- Unlimited annotation queues
- High rate limits
- SOC2 & ISO27001 reports, HIPAA-ready region
- Prioritized in-app support
Enterprise
- Everything in Pro + Teams
- 100k units / month included, additional: $8/100k units. Lower with volume (pricing calculator)
- Audit Logs
- SCIM API
- Custom rate limits
- Uptime SLA
- Support SLA
- Named lead support engineer
Comet vs Langfuse FAQ
- Which one is cheaper?
- Comet starts lower at $19/mo, compared to $29/mo for Langfuse.
- 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. Langfuse: Langfuse plays the developer-friendly value card in the LLM observability space, with a generous free tier, a cheap $29 entry point, and a self-host escape hatch that undercuts closed-source rivals on trust and cost. Startup, EDU, and OSS discounts show they're courting the builder community first and treating enterprise as the follow-on revenue.
Still deciding? See the best Comet alternatives or the best Langfuse alternatives, ranked with verified pricing.
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