# Arize Phoenix vs Weights & Biases Weave

| Attribute | Arize Phoenix | Weights & Biases Weave |
|---|---|---|
| **vioscaleAI score** | 53.7 (51% (medium)) | 51.7 (25% (low)) |
| activity.commits_last_30d | 100 | - |
| adoption.dependent_repos | 0 | - |
| adoption.github_stars | 11,858 | - |
| 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":"Platform for observability and analysis of production AI agent systems, featuring distributed tracing across multi-agent workflows, built-in evaluation APIs for model and prompt testing, and safety guardrails with pre-built scorers for toxicity, bias, PII detection, and hallucinations. It is indexed under Llm Observability.","source":"https://wandb.ai/site/weave","question":"What is Weights & Biases Weave?","confidence":0.6},{"answer":"Weights & Biases Weave supports the web and iOS. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://wandb.ai/site/weave","question":"What platforms does Weights & Biases Weave support?","confidence":0.6},{"answer":"Yes. Weights & Biases Weave can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://wandb.ai/site/weave","question":"Can Weights & Biases Weave be self-hosted?","confidence":0.6},{"answer":"We have confirmed 14 integrations for Weights & Biases Weave, including Slack, LangChain, LlamaIndex, CrowdStrike Falcon AIDR, OpenPI, CoreWeave, NVIDIA and JAX, plus 6 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://wandb.ai/site/weave","question":"What does Weights & Biases Weave integrate with?","confidence":0.6}]` |
| deployment.options | `{"self_hosted":true}` | `{"cloud":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. | Platform for observability and analysis of production AI agent systems, featuring distributed tracing across multi-agent workflows, built-in evaluation APIs for model and prompt testing, and safety guardrails with pre-built scorers for toxicity, bias, PII detection, and hallucinations. |
| 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}` | `{"architecture_model":"managed_cloud_saas","pii_redaction_and_prompt_content_masking":true,"prompt_playground_and_in_dashboard_replay":true,"multi_step_agentic_workflow_distributed_tracing":true,"native_integration_with_langchain_and_llamaindex":true}` |
| integrations.count | 11 | 14 |
| 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":"Slack"},{"name":"LangChain"},{"name":"LlamaIndex"},{"name":"CrowdStrike Falcon AIDR"},{"name":"OpenPI"},{"name":"CoreWeave"},{"name":"NVIDIA"},{"name":"JAX"},{"name":"PyTorch"},{"name":"OpenAI GPT-5.6"},{"name":"OpenAI GPT-5.5"},{"name":"Zhipu GLM-5.2"},{"name":"Alibaba Kimi 2.7"},{"name":"Anthropic Claude Opus 4.8"},{"name":"Webhooks","native":true,"direction":"outbound"},{"name":"OpenAI","native":true,"category":"llm"},{"name":"AWS Bedrock","native":true,"category":"infrastructure"},{"name":"Google ADK","native":true,"category":"agents"},{"name":"Claude Code","native":true}]` |
| language.primary | Python | - |
| 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":"free","freeTier":true,"sourceUrl":"https://wandb.ai/site/weave","retrievedAt":"2026-10-13T11:19:13.627Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | free |
| 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"}]` | - |
| 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}` | - |

## Capabilities (Llm Observability)

| Capability | Arize Phoenix | Weights & Biases Weave |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Architecture model | Open source self hosted | Managed cloud saas |
| 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 | - |

*Source: vioscaleAI. Generated 2026-10-16T19:19:10.438Z. "-" = undocumented, not absent.*