Arize is an AI observability company whose AX platform monitors, traces, and evaluates both traditional ML models and LLM applications. Its Phoenix project provides tracing and evaluation that runs locally or self-hosted and feeds the same workflows as the hosted platform. The managed AX service has a free tier with a monthly span allowance and a paid Pro plan, with enterprise plans priced by quote. Phoenix is licensed under the Elastic License 2.0, which permits free self-hosting but is not an OSI-approved open-source license.
llm-tracingevalsml-observability
Overview
- Founded
- 2020
- Pricing tier
- Mid
- Startup-friendly
- Yes
- Enterprise-ready
- Yes
LLM observability
- Request tracing
- Yes
- Quality evals
- Yes
- Prompt management
- Yes
- LLM gateway
- No
- Open-source
- No
- Self-hostable
- Yes
- Free tier
- Yes: AX Free: 25k spans/mo; Phoenix self-host free