Tools
Arize Phoenix vs Opik
Arize Phoenix or Opik? 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: API, Traces and evaluates
- Only Arize Phoenix states: Command line, Self-hosted
- Only Opik states: Agent that edits files, Knows the whole codebase, Choice of models, Official SDKs
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.
Opik
Opik is an open-source platform for tracing, evaluating, testing, and monitoring LLM applications and AI agents.
Plans
Open Source
Free
- Full AI observability & agent testing feature set
- True OSS: same codebase as the hosted versions
- Agent tracing & analysis
- Test Suites & assertions
- Agent Playground
Free Cloud
Free
- Up to 10 team members
- 25k spans per month
- 60-day data retention
- Agent tracing & analysis
- Test Suites & assertions
- Agent Playground
Pro Cloud
- $19 Per month
- Up to 50 team members
- 100k spans per month
- 60-day data retention
- Customizable monthly span limits
- Customizable data retention periods
Enterprise
Price on request
- Unlimited team members
- Custom usage plans
- Flexible deployments
- Service accounts and view-only users
- Single sign-on
- Dedicated support and SLAs
Prices checked 2026-09-24 on the maker’s page.
Capabilities
- Agent that edits files — “Opik’s powerful coding assistant analyzes your traces, suggests fixes, and implements them in your development code — with built-in version control and regression testing.” source
- Knows the whole codebase — “Configure it to let Ollie read your agent codebase and write fixes directly to it.” source
- Choice of models — “If you’re not ready to log traces yet, we recommend trying out the prompt playground to experiment with user prompts and system prompts and compare models side by side, with no setup steps required.” source
- API — “Opik’s REST API and complete Python client can be used with both the Open-Source platform and Opik Cloud” source
- Official SDKs — “SDKs (Python, TypeScript)” source
- Traces and evaluates — “Opik logs every step your agent takes, from user interactions to context retrieval and tool calls — with automated eval workflows to find and fix errors across development, testing, and production.” source
Security
- SOC 2 Type II — “SOC 2 Type 2” source
- SOC 2 — “SOC 2 Type 2” source
- ISO 27001 — “ISO/IEC 27001:2022” source
Latest updates
- 2.2.81-6780 (2.2.81-6780)
Provision the extended free-form SQL ClickHouse user.
- 2.2.80 (2.2.80)
- 2.2.79 (2.2.79)