Side-by-side

Arize Phoenix vs Portkey

Arize PhoenixPortkey

Bottom line: Arize Phoenix for engineers debugging LLM and agent apps; Portkey for teams routing production traffic across many LLMs.

	Arize Phoenix Open-source LLM and agent observability built on OpenTelemetry. Visit	Portkey Open-source AI gateway and control plane for production Gen AI. Visit
Votes	0	0
Pricing	Freemium	Freemium
Category	Coding	Coding
Tags	observabilityllm-evaluationopen-sourcetracingmonitoring	ai-gatewayllmopsopen-sourceobservabilitygovernance
Best for	Engineers debugging LLM and agent apps Teams wanting free, self-hosted observability Eval-driven development workflows	Teams routing production traffic across many LLMs Organizations needing governance and reliability tooling Developers wanting an open-source, self-hostable gateway
Pros	Free and source-available, self-hosts in one command Built on open OpenTelemetry standards Strong tracing and evaluation for agents and RAG Works locally, good for private/dev-time debugging Backed by Arize's observability expertise	Fully open-source, self-hostable gateway for data control and no lock-in Access to more than 1,600 models through one API Broad feature set spanning observability, guardrails, routing, prompts, and cost control Transparent, relatively cheap entry with free and ~$49 tiers Battle-tested at very large scale
Cons	Production-scale features require paid Arize AX Self-hosting means you run the infrastructure Dynatrace acquisition may change roadmap/governance Observability setup still requires instrumentation effort Evaluation quality depends on judge models and config	Adds a network hop and dependency in the critical request path Log-volume-based pricing can get complex or expensive at scale Free-tier logging caps and short retention are tight for real debugging Self-hosting the open-source gateway shifts ops burden to you It is a gateway and ops layer, not a full build-and-eval IDE

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