Evidently AIOpen-source AI evaluation and observability
vs
LangfuseOpen Source Agent Evals & Observability
Comparison · MLOps Platforms · weekly run Nov 2
Evidently AI vs Langfuse
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Evidently AI is the stronger AI pick in MLOps Platforms: it has a visibility score of 2.4 versus 0.3 for Langfuse.
Choose Evidently AI if…
- You want the brand AI engines rank higher (2.4 vs 0.3)
- Listed as a monitoring option in vendor-neutral ML stacks
- Named alongside Prometheus and Grafana in monitoring setups
- Grouped with Arize and WhyLabs as a monitoring tool
Choose Langfuse if…
- You need a self-hosted or on-premises option
- You need SOC 2 Type II or ISO 27001 or HIPAA-ready region or GDPR 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 | Evidently AI | Langfuse |
|---|---|---|
| Visibility score | 2.4% | 0.3% |
| Change vs last week | New | New |
| Rank in MLOps Platforms | #25 | #51 |
| Share of voice | 0.9% | 0.2% |
| Mentions this run | 7 | 1 |
| Positive in AI answers | 50% | 50% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Evidently AI 0pp · Langfuse 0pp over 0 weekly runs.
Engine by engine
Evidently AI leads on 2 of 3 engines
ChatGPT
AI Mode
Perplexity
Evidently AILangfuse
Head to head in AI answers
0 engine answers name both brands
0Evidently AI ranked higher
0Langfuse ranked higher
Features, pricing & fit
| Dimension | Evidently AI | Langfuse |
|---|---|---|
| Pricing model | — | Usage-based |
| Entry price | — | Free; paid from $29 / mo |
| Free plan | — | Yes |
| Deployment | The open-source version runs on the customer's own infrastructure; Evidently Cloud runs on managed infrastructure. | Langfuse Cloud in US, EU, Japan and HIPAA regions, or self-hosted under the MIT license |
| Integrations | — | 100+ |
| Compliance | — | SOC 2 Type II, ISO 27001, HIPAA-ready region, GDPR |
| Support | — | 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 | 2020 | — |
| Headquarters | San Francisco, CA, United States | — |
| Employees | 1–10 | — |
| Funding | Seed · $1M raised | Seed · $4M raised |
| Best for | AI and ML teams that want open-source evaluation, testing and monitoring for LLM applications and predictive models. | Engineering teams building LLM applications and AI agents that want open-source, self-hostable tracing and evaluation |
Plans side by side
Evidently AI
Pricing not available.
Pros and cons
Themes from the AI answers that mention each brand
Evidently AI
- Listed as a monitoring option in vendor-neutral ML stacks
- Named alongside Prometheus and Grafana in monitoring setups
- Grouped with Arize and WhyLabs as a monitoring tool
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, “Evidently AI vs Langfuse”, https://slateindex.ai/compare/evidently-ai-vs-langfuse, data of Nov 2, 2026. Licence: CC BY 4.0.