Tools
Arize Phoenix vs Weights & Biases
Arize Phoenix or Weights & Biases? Their plans monthly and yearly, the capabilities their makers state, security and latest updates, side by side — read from the makers' own pages.
In short
- Both: Command line, Self-hosted, API, Traces and evaluates
- Only Weights & Biases states: Official SDKs, Runs models for you, Builds agents and workflows
Arize Phoenix
Open-source platform for tracing, evaluating, and improving AI agents and LLM applications.
Plans
AX Free
Free
- 10 issues per month
- 25k spans per month
- 1 GB per month
- 15 days retention
- SaaS deployment
- Unlimited users and evals
AX Pro
- $50 per month
- 25 issues per month
- 50k spans per month
- 10 GB per month
- 30 days retention
- SaaS deployment
- Unlimited users and evals
AX Enterprise
Price on request
- Unlimited issues
- Custom span volume
- Custom ingestion volume
- Custom retention
- SaaS or Self-Hosted deployment
- Unlimited users and evals
Prices checked 2026-09-25 on the maker’s page.
Capabilities
- Command line — “Get Started Locally $ uvx arize-phoenix serve” source
- Self-hosted — “Self-host Phoenix and keep sensitive data on your own infrastructure.” source
- API — “Docs Quickstarts, API reference, and integration guides” source
- Traces and evaluates — “Phoenix shows every step your agent takes so you know what went wrong.” source
Security
- SOC 2 Type II — “Arize AI Announces SOC 2 Type II Certification” source
- SOC 2 — “Arize AI Announces SOC 2 Type II Certification” source
- ISO 27001 — “ISO/IEC 27001 Certified” source
- GDPR — “GDPR Compliant” source
- HIPAA — “HIPAA Compliant” source
- Data kept in the EU — “Arize AI: Support for EU Data Residency” source
Latest updates
- Get Alyx help tailored to your experience
Alyx adapts how it helps based on your experience level in each part of Arize AX.
- Pick up where you left off with Alyx long-term memory
Alyx remembers context across conversations, including preferences, goals, project and asset learnings, team conventions, and decisions.
- Add and annotate entire sessions and traces in annotation queues
Send sessions and traces to an annotation queue and review them at session or trace granularity.
Weights & Biases
AI developer platform for tracking experiments, managing models and datasets, and evaluating and monitoring AI applications.
Plans
Free
Free
- AI application evaluations
- AI application tracing
- AI application scorers
- AI model experiment tracking
- AI assets registry & lineage tracking
- Community Support
Pro
- Starts at $60/month, billed monthly
- Unlimited teams for collaboration
- Team-based access controls
- Service Accounts
- Priority email & chat support
- CI/CD automations
- Slack and email alerts
Enterprise
Price on request
- Single tenant option with choice of region
- HIPAA compliant option
- Secure private connectivity
- Customer-managed encryption key
- Single Sign On
- Automated user provisioning
Personal
Free
- 1 user seat
- Experiment tracking
- Registry & lineage tracking
- Run a W&B server locally on any machine with Docker and Python installed
- For personal projects only. Corporate use is not allowed.
Advanced Enterprise
Price on request
- Flexible deployment options
- HIPAA compliant option
- Secure private connectivity
- Customer-managed encryption key
- Single Sign On
- Automated user provisioning
Free forever for academic research
Free
- All the product features included on Pro
- Unlimited tracked hours
- 200GB of cloud storage
- Up to 25GB/mo of Weave data ingestion
- Up to 100 seats
- Additional cloud storage can be purchased for $0.03 per GB, billed monthly
Prices checked 2026-09-25 on the maker’s page.
Capabilities
- Command line — “You can then use the command line to start the server.” source
- Self-hosted — “Self-hosting allows you to run Weights & Biases on your own infrastructure, giving you full control over your data and privacy.” source
- API — “Each inference API has different costs for input and output tokens.” source
- Official SDKs — “Core | Reports | Automations | SDK” source
- Runs models for you — “Inference Access and explore hosted AI models” source
- Builds agents and workflows — “W&B Weave: Build agentic AI applications” source
- Traces and evaluates — “Monitor and analyze the performance of your GenAI models during development and in production, capturing inputs, outputs, and metadata for each inference.” source
Security
- SOC 2 Type II — “We are certified under ISO/IEC 27001:2022, ISO/IEC 27017:2015, and ISO/IEC 27018:2019, and remain compliant with SOC 2 Type 2 and HIPAA standards.” source
- SOC 2 — “We are certified under ISO/IEC 27001:2022, ISO/IEC 27017:2015, and ISO/IEC 27018:2019, and remain compliant with SOC 2 Type 2 and HIPAA standards.” source
- ISO 27001 — “We are certified under ISO/IEC 27001:2022, ISO/IEC 27017:2015, and ISO/IEC 27018:2019, and remain compliant with SOC 2 Type 2 and HIPAA standards.” source
- HIPAA — “We are certified under ISO/IEC 27001:2022, ISO/IEC 27017:2015, and ISO/IEC 27018:2019, and remain compliant with SOC 2 Type 2 and HIPAA standards.” source