CometThe Fastest Path to Agents That Work
vs
LangfuseOpen Source Agent Evals & Observability
Comparison · MLOps Platforms · weekly run Nov 2
Comet vs Langfuse
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Comet is the stronger AI pick in MLOps Platforms: it has a visibility score of 13.6 versus 0.3 for Langfuse.
Choose Comet if…
- You want the brand AI engines rank higher (13.6 vs 0.3)
- You want a lower entry price ($19 vs $29)
- AI answers describe it more positively (53% vs 50% positive)
- You need SOC 2 or ISO 9001 or HIPAA coverage
Choose Langfuse if…
- You need more native integrations (100+ vs 60+)
- You need SOC 2 Type II or HIPAA-ready region coverage
- Discounted cloud pricing for qualifying early-stage startups
- Well suited to evaluating and debugging LLM or agent behavior
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Comet | Langfuse |
|---|---|---|
| Visibility score | 13.6% | 0.3% |
| Change vs last week | New | New |
| Rank in MLOps Platforms | #10 | #51 |
| Share of voice | 2.7% | 0.2% |
| Mentions this run | 19 | 1 |
| Positive in AI answers | 53% | 50% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Comet 0pp · Langfuse 0pp over 0 weekly runs.
Engine by engine
Comet leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
CometLangfuse
Head to head in AI answers
0 engine answers name both brands
0Comet ranked higher
0Langfuse ranked higher
Features, pricing & fit
| Dimension | Comet | Langfuse |
|---|---|---|
| Pricing model | Usage-based | Usage-based |
| Entry price | Free; paid from $19 / mo | Free; paid from $29 / mo |
| Free plan | Yes | Yes |
| Deployment | Cloud, virtual private cloud, on-premises, or self-hosted open source | Langfuse Cloud in US, EU, Japan and HIPAA regions, or self-hosted under the MIT license |
| Integrations | 60+ | 100+ |
| Compliance | SOC 2, ISO 27001, ISO 9001, HIPAA, GDPR | SOC 2 Type II, ISO 27001, HIPAA-ready region, GDPR |
| Support | Community (Slack and GitHub), Self-service (Ask AI and Opik MCP Server), Email support, Dedicated support team and SLAs | Community support via GitHub, In-app support, Private Slack or MS Teams channel on Pro and Enterprise plans, Named lead support engineer on Enterprise plans |
| Founded | 2017 | — |
| Headquarters | New York, NY, United States | — |
| Employees | 51–200 | — |
| Funding | Series B · $70M raised | Seed · $4M raised |
| Best for | Developers and teams building LLM applications and AI agents who need tracing, testing and evaluation. | Engineering teams building LLM applications and AI agents that want open-source, self-hostable tracing and evaluation |
Plans side by side
Comet
Opik Open Source$0free
Opik Free Cloud$0free plan
Opik Pro Cloud$19month
Opik EnterpriseCustomcustom
MLOps Free$0free plan
MLOps Pro$19user/month
MLOps EnterpriseCustomcustom
Pros and cons
Themes from the AI answers that mention each brand
Comet
- Free tier for individuals and small projects
- Robust experiment tracking
- Great visualization tools
- Clear, publicly listed pricing
Langfuse
- Discounted cloud pricing for qualifying early-stage startups
- Well suited to evaluating and debugging LLM or agent behavior
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Comet vs Langfuse”, https://slateindex.ai/compare/comet-vs-langfuse, data of Nov 2, 2026. Licence: CC BY 4.0.