Side-by-side

Weights & Biases vs Portkey

Weights & BiasesPortkey

Bottom line: Weights & Biases for mL and AI teams needing mature experiment tracking; Portkey for teams routing production traffic across many LLMs.

	Weights & Biases The AI developer platform for experiment tracking and LLMOps. Visit	Portkey Open-source AI gateway and control plane for production Gen AI. Visit
Votes	0	0
Pricing	Freemium	Freemium
Category	Coding	Coding
Tags	mlopsllmopsexperiment-trackingllm-observabilityevaluation	ai-gatewayllmopsopen-sourceobservabilitygovernance
Best for	ML and AI teams needing mature experiment tracking Teams shipping LLM apps that need tracing and evaluation Research groups and enterprises with existing W&B workflows	Teams routing production traffic across many LLMs Organizations needing governance and reliability tooling Developers wanting an open-source, self-hostable gateway
Pros	Industry-standard, mature experiment tracking with a large user base Weave gives low-friction LLM tracing with one decorator plus rich evals Covers both classic ML and modern LLMOps in one ecosystem Pre-built safety and quality scorers and guardrails out of the box Genuinely useful free tier for individuals and a strong academic program	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	Non-commercial restriction on the free tier limits business use New 2026 usage-metered billing makes costs harder to predict A team-size threshold pushes growing teams into custom Enterprise quickly Enterprise seat pricing is high per third-party estimates Only the Weave SDK is open source; the backend is proprietary and SaaS-first	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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