# Arize Phoenix vs Langfuse

**Leader by vioscaleAI score:** Langfuse

| Attribute | Arize Phoenix | Langfuse |
|---|---|---|
| **vioscaleAI score** | 53.7 (51% (medium)) | 66.4 (56% (medium)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 0 | 0 |
| adoption.github_stars | 11,858 | 35,781 |
| adoption.package_downloads_weekly | - | 6,493,381 |
| content.faq | `[{"answer":"Phoenix provides OpenTelemetry-based instrumentation for LLM applications, AI-powered evaluation of model outputs and retrieval quality, and systematic prompt management with versioning. It supports both self-hosted and cloud deployment and integrates with major LLM frameworks and development tools. It is indexed under Llm Observability.","source":"https://phoenix.arize.com","question":"What is Arize Phoenix?","confidence":0.6},{"answer":"Yes. Arize Phoenix can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://phoenix.arize.com","question":"Can Arize Phoenix be self-hosted?","confidence":0.6},{"answer":"We have confirmed 8 integrations for Arize Phoenix, including LlamaIndex, OpenAI, Anthropic, AWS Bedrock, Vertex AI, Claude Code, Cursor and OpenLLMetry. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://phoenix.arize.com","question":"What does Arize Phoenix integrate with?","confidence":0.6}]` | `[{"answer":"A comprehensive observability and development platform that combines tracing, prompt management, evaluation, and experimentation, enabling teams to understand LLM behavior in production and ship improved applications with confidence It is indexed under MLOps & LLMOps Tools.","source":"https://langfuse.com/changelog/2025-08-08-openai-pricing-availability","question":"What is Langfuse?","confidence":0.6},{"answer":"Langfuse is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Paid editions are also offered: Core and Enterprise, priced on request. Pricing changes often, so verify at source before relying on it.","source":"https://langfuse.com/changelog/2025-08-08-openai-pricing-availability","question":"Is Langfuse free to use?","confidence":0.6},{"answer":"Langfuse supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://langfuse.com/changelog/2025-08-08-openai-pricing-availability","question":"What platforms does Langfuse support?","confidence":0.6},{"answer":"Yes. Langfuse can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://langfuse.com/changelog/2025-08-08-openai-pricing-availability","question":"Can Langfuse be self-hosted?","confidence":0.6},{"answer":"We have confirmed 21 integrations for Langfuse, including LangChain, Vercel AI SDK, LiteLLM, Pydantic AI, Google ADK, CrewAI, LiveKit and Haystack, plus 13 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://langfuse.com/changelog/2025-08-08-openai-pricing-availability","question":"What does Langfuse integrate with?","confidence":0.6},{"answer":"We have independently confirmed SOC 2, ISO 27001, HIPAA and GDPR for Langfuse. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Langfuse not holding them. Always confirm compliance directly before you rely on it.","source":"https://langfuse.com","question":"What security certifications does Langfuse have?","confidence":0.48},{"answer":"Yes. Langfuse is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://www.npmjs.com/package/langfuse","question":"Is Langfuse open source?","confidence":0.85}]` |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | A self-hosted platform that traces and evaluates language model application behavior using OpenTelemetry instrumentation, enabling teams to debug, optimize, and monitor LLM performance. | A comprehensive observability and development platform that combines tracing, prompt management, evaluation, and experimentation, enabling teams to understand LLM behavior in production and ship improved applications with confidence |
| features.capabilities | `{"pricing_model":"free_open_source","architecture_model":"open_source_self_hosted","production_ab_testing_of_system_prompts":true,"token_cost_and_latency_waterfall_charts":true,"prompt_playground_and_in_dashboard_replay":true,"multi_step_agentic_workflow_distributed_tracing":true,"opentelemetry_openllmetry_native_export_support":true,"native_integration_with_langchain_and_llamaindex":true}` | `{"role":"observability","evaluation":true,"managed_cloud":true,"model_serving":false,"pricing_model":"free_open_source","self_hostable":true,"multi_provider":true,"vpc_deployment":true,"otel_compatible":true,"llm_observability":true,"prompt_management":true,"architecture_model":"open_source_self_hosted","framework_agnostic":true,"experiment_tracking":true,"token_cost_and_latency_waterfall_charts":true,"prompt_playground_and_in_dashboard_replay":true,"multi_step_agentic_workflow_distributed_tracing":true,"opentelemetry_openllmetry_native_export_support":true,"user_feedback_score_api_for_thumbs_up_down_tags":true,"native_integration_with_langchain_and_llamaindex":true}` |
| integrations.count | 11 | 100 |
| integrations.list | `[{"name":"LlamaIndex"},{"name":"OpenAI"},{"name":"Anthropic"},{"name":"AWS Bedrock"},{"name":"Vertex AI"},{"name":"Claude Code"},{"name":"Cursor"},{"name":"OpenLLMetry"},{"name":"OpenTelemetry","native":true},{"name":"OpenInference"},{"name":"Gemini","native":true,"category":"llm"},{"name":"Google Vertex AI","native":true},{"name":"Google Gemini","native":true},{"name":"Together AI","native":true},{"name":"Fireworks","native":true},{"name":"NVIDIA NIM","native":true},{"name":"LiteLLM","native":true},{"name":"LangChain","native":true},{"name":"Traceloop","native":true}]` | `[{"name":"LangChain"},{"name":"Vercel AI SDK"},{"name":"LiteLLM"},{"name":"Pydantic AI"},{"name":"Google ADK"},{"name":"CrewAI"},{"name":"LiveKit"},{"name":"Haystack"},{"name":"LlamaIndex"},{"name":"OpenAI"},{"name":"Anthropic"},{"name":"Amazon Bedrock"},{"name":"Azure OpenAI"},{"name":"Mistral AI"},{"name":"Google Gemini"},{"name":"xAI"},{"name":"vLLM"},{"name":"Groq"},{"name":"OpenAI SDK"},{"name":"Cohere"},{"name":"Elasticsearch"},{"name":"OpenSearch"},{"name":"Hugging Face"},{"name":"OpenTelemetry","native":true,"category":"observability","direction":"bidirectional"}]` |
| language.primary | Python | TypeScript |
| license.spdx | - | MIT |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true}` | `{"web":true}` |
| pricing | `{"type":"open_source","summary":"Open-source and free","freeTier":true,"sourceUrl":"https://phoenix.arize.com","retrievedAt":"2026-09-13T20:03:21.729Z"}` | `{"type":"subscription","plans":[{"free":true,"name":"Hobby"},{"free":false,"name":"Core"},{"free":false,"name":"Enterprise"}],"summary":"Multiple tiers available; specific pricing not shown in provided text","freeTier":true,"sourceUrl":"https://langfuse.com/changelog/2025-08-08-openai-pricing-availability","retrievedAt":"2026-08-13T09:38:11.860Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | freemium |
| pricing.price_level | free | free |
| pricing.transparent | - | no |
| release.history | `[{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.22.0","date":"2026-10-15T07:02:33Z","type":"stable","version":"arize-phoenix-v20.22.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.21.4","date":"2026-10-14T16:12:17Z","type":"stable","version":"arize-phoenix-v20.21.4"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.21.3","date":"2026-10-14T03:38:44Z","type":"stable","version":"arize-phoenix-v20.21.3"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.21.2","date":"2026-10-13T16:04:09Z","type":"stable","version":"arize-phoenix-v20.21.2"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.21.1","date":"2026-10-12T21:09:18Z","type":"stable","version":"arize-phoenix-v20.21.1"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-sqlean-v0.2.0","date":"2026-10-13T03:17:51Z","type":"stable","version":"arize-phoenix-sqlean-v0.2.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.21.0","date":"2026-10-11T14:23:03Z","type":"stable","version":"arize-phoenix-v20.21.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-evals-v3.9.2","date":"2026-10-09T15:27:08Z","type":"stable","version":"arize-phoenix-evals-v3.9.2"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/%40arizeai/phoenix-mcp%404.3.16","date":"2026-10-09T22:00:58Z","type":"stable","version":"@arizeai/phoenix-mcp@4.3.16"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/%40arizeai/phoenix-client%407.16.1","date":"2026-10-09T22:00:52Z","type":"stable","version":"@arizeai/phoenix-client@7.16.1"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/%40arizeai/phoenix-cli%401.18.8","date":"2026-10-09T22:00:55Z","type":"stable","version":"@arizeai/phoenix-cli@1.18.8"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.20.0","date":"2026-10-09T00:35:00Z","type":"stable","version":"arize-phoenix-v20.20.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-evals-v3.9.1","date":"2026-10-08T03:15:45Z","type":"stable","version":"arize-phoenix-evals-v3.9.1"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.19.0","date":"2026-10-01T22:59:10Z","type":"stable","version":"arize-phoenix-v20.19.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.18.0","date":"2026-09-30T23:04:10Z","type":"stable","version":"arize-phoenix-v20.18.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.17.0","date":"2026-09-30T22:10:01Z","type":"stable","version":"arize-phoenix-v20.17.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/%40arizeai/phoenix-mcp%404.3.15","date":"2026-09-30T23:35:39Z","type":"stable","version":"@arizeai/phoenix-mcp@4.3.15"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/%40arizeai/phoenix-client%407.16.0","date":"2026-09-30T23:35:33Z","type":"stable","version":"@arizeai/phoenix-client@7.16.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/%40arizeai/phoenix-cli%401.18.7","date":"2026-09-30T23:35:36Z","type":"stable","version":"@arizeai/phoenix-cli@1.18.7"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/%40arizeai/phoenix-mcp%404.3.14","date":"2026-09-29T19:17:12Z","type":"stable","version":"@arizeai/phoenix-mcp@4.3.14"}]` | `[{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.58.0","date":"2026-10-13T07:05:09Z","type":"stable","version":"v4.58.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.57.0","date":"2026-10-12T17:20:29Z","type":"stable","version":"v4.57.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v3.225.12","date":"2026-10-12T21:43:09Z","type":"stable","version":"v3.225.12"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.56.0","date":"2026-10-09T10:13:50Z","type":"stable","version":"v4.56.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.55.0","date":"2026-10-08T13:36:14Z","type":"stable","version":"v4.55.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.54.0","date":"2026-10-07T08:55:56Z","type":"stable","version":"v4.54.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.53.0","date":"2026-10-06T12:27:00Z","type":"stable","version":"v4.53.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.52.0","date":"2026-10-06T08:07:37Z","type":"stable","version":"v4.52.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.51.0","date":"2026-10-05T15:47:49Z","type":"stable","version":"v4.51.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.50.0","date":"2026-10-02T10:13:55Z","type":"stable","version":"v4.50.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.49.0","date":"2026-10-01T09:58:56Z","type":"stable","version":"v4.49.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.48.0","date":"2026-09-30T10:12:22Z","type":"stable","version":"v4.48.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.47.0","date":"2026-09-29T08:25:01Z","type":"stable","version":"v4.47.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.46.0","date":"2026-09-25T14:20:07Z","type":"stable","version":"v4.46.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.45.4","date":"2026-09-25T09:41:43Z","type":"stable","version":"v4.45.4"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.45.3","date":"2026-09-25T09:19:59Z","type":"stable","version":"v4.45.3"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.45.2","date":"2026-09-24T19:16:32Z","type":"stable","version":"v4.45.2"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.45.1","date":"2026-09-24T12:53:12Z","type":"stable","version":"v4.45.1"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.45.0","date":"2026-09-24T12:15:42Z","type":"stable","version":"v4.45.0"},{"url":"https://github.com/langfuse/langfuse/releases/tag/v4.44.0","date":"2026-09-24T09:07:02Z","type":"stable","version":"v4.44.0"}]` |
| reliability.status_page | - | yes |
| security.gdpr | - | yes |
| security.hipaa | - | yes |
| security.iso27001 | - | yes |
| security.soc2 | - | yes |
| security.trust_center | - | https://langfuse.com/docs/security-and-guardrails |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40arizeai%2Fphoenix-config&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=helm&package_name=rock8s%2Flangfuse&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Llm Observability)

| Capability | Arize Phoenix | Langfuse |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Architecture model | Open source self hosted | Open source self hosted |
| Token cost and latency waterfall charts | ✓ | ✓ |
| Opentelemetry openllmetry native export support | ✓ | ✓ |
| Prompt playground and in dashboard replay | ✓ | ✓ |
| Multi step agentic workflow distributed tracing | ✓ | ✓ |
| User feedback score API for thumbs up down tags | - | ✓ |
| Pii redaction and prompt content masking | - | - |
| Production ab testing of system prompts | ✓ | - |
| Automated anomaly detection for rate limits | - | - |
| Native integration with langchain and llamaindex | ✓ | ✓ |
| SOC2 type ii | - | - |
| Mit or apache permissive oss license | - | - |
| Pricing model | Free open source | Free open source |

*Source: vioscaleAI. Generated 2026-10-16T18:28:27.619Z. "-" = undocumented, not absent.*