Arize AI is an AI engineering and observability platform for LLM applications, agents, and traditional ML systems. The commercial Arize AX platform (with Generative and ML & CV variants) provides tracing, evaluation, experiments, prompt management, and the Alyx AI engineering agent, built on the OpenInference OpenTelemetry conventions. Phoenix is the open-source counterpart used by tens of thousands of developers for local tracing, evaluation, and prompt iteration. Arize is vendor- and framework-agnostic with 30+ instrumentation providers and an OTLP-native ingestion path.
Arize AI publishes 5 APIs on the APIs.io network, including Traces API, and 4 more. Tagged areas include LLM Observability, ML Monitoring, Open Source, OpenTelemetry, and Phoenix.
Arize AI’s developer surface includes authentication, documentation, engineering blog, pricing, and 16 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Horizontal (data, software, accessibility, platform) regime, so
Regulatory Posture carries 15 points of the composite.
If this regime is wrong for your business, say so on your
provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it
carries 10 points of the composite. It is scored from the published contracts
themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already
holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in
front of it, and the first time that check is skipped a duplicate record is created.
Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet,
not penalised by it.
The six quality facets above are damped to 75 points between them,
because the conditional facet above carries the other
25. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 75% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/arize-ai: open an issue to ask a question, or submit a pull request to add artifacts.
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Arize AX is the commercial AI engineering platform covering tracing, evaluation, experiments, prompt management, annotations, and dashboards for LLM applications and agents. Bui...
Phoenix is Arize's open-source LLM observability platform offering local tracing, evaluation, experiments, and prompt iteration. Distributed as a Python package with a local UI,...
OpenInference is Arize's open-source set of OpenTelemetry conventions and instrumentation libraries for LLM applications, agents, RAG pipelines, and frameworks. Provides Python ...
Alyx is Arize's AI engineering agent that helps developers debug traces, create evaluators, build dashboards, and compare experiments inside the Arize AX platform.
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