# Arize Phoenix vs Weights & Biases Weave

| Attribute | Arize Phoenix | Weights & Biases Weave |
|---|---|---|
| **Vioscale score** | 48 (18% (low)) | 52 (9% (low)) |
| activity.commits_last_30d | 100 | - |
| adoption.dependent_repos | 0 | - |
| adoption.github_stars | 11,203 | - |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | 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. | 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 | 8 | 14 |
| integrations.list | `[{"name":"LlamaIndex"},{"name":"OpenAI"},{"name":"Anthropic"},{"name":"AWS Bedrock"},{"name":"Vertex AI"},{"name":"Claude Code"},{"name":"Cursor"},{"name":"OpenLLMetry"}]` | `[{"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"}]` |
| language.primary | Python | - |
| platform.support | - | `{"ios":true,"web":true}` |
| pricing.model | commercial | commercial |
| release.history | `[{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.4.0","date":"2026-08-26T03:46:03Z","type":"stable","version":"arize-phoenix-v20.4.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-sqlean-v0.1.1","date":"2026-08-25T05:39:32Z","type":"stable","version":"arize-phoenix-sqlean-v0.1.1"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-evals-v3.5.1","date":"2026-08-25T02:41:27Z","type":"stable","version":"arize-phoenix-evals-v3.5.1"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-client-v3.3.0","date":"2026-08-22T01:40:51Z","type":"stable","version":"arize-phoenix-client-v3.3.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-evals-v3.5.0","date":"2026-08-21T18:58:26Z","type":"stable","version":"arize-phoenix-evals-v3.5.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.3.0","date":"2026-08-17T21:51:21Z","type":"stable","version":"arize-phoenix-v20.3.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.2.1","date":"2026-08-14T20:49:42Z","type":"stable","version":"arize-phoenix-v20.2.1"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-client-v3.2.0","date":"2026-08-14T18:02:59Z","type":"stable","version":"arize-phoenix-client-v3.2.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.2.0","date":"2026-08-13T20:31:17Z","type":"stable","version":"arize-phoenix-v20.2.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.1.0","date":"2026-08-12T09:12:59Z","type":"stable","version":"arize-phoenix-v20.1.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v20.0.0","date":"2026-08-11T18:48:09Z","type":"stable","version":"arize-phoenix-v20.0.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-client-v3.1.0","date":"2026-08-11T20:22:34Z","type":"stable","version":"arize-phoenix-client-v3.1.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-client-v3.0.0","date":"2026-08-11T01:49:51Z","type":"stable","version":"arize-phoenix-client-v3.0.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v19.21.0","date":"2026-08-10T18:46:17Z","type":"stable","version":"arize-phoenix-v19.21.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v19.20.0","date":"2026-08-10T16:47:18Z","type":"stable","version":"arize-phoenix-v19.20.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-otel-v0.17.1","date":"2026-08-10T17:33:30Z","type":"stable","version":"arize-phoenix-otel-v0.17.1"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v19.19.1","date":"2026-08-08T07:26:31Z","type":"stable","version":"arize-phoenix-v19.19.1"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-otel-v0.17.0","date":"2026-08-08T06:31:30Z","type":"stable","version":"arize-phoenix-otel-v0.17.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-evals-v3.4.0","date":"2026-08-08T06:13:34Z","type":"stable","version":"arize-phoenix-evals-v3.4.0"},{"url":"https://github.com/Arize-ai/phoenix/releases/tag/arize-phoenix-v19.19.0","date":"2026-08-07T02:50:30Z","type":"stable","version":"arize-phoenix-v19.19.0"}]` | - |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=arize-phoenix-client&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: Vioscale. Generated 2026-09-01T17:28:24.810Z. "-" = undocumented, not absent.*