W&B Weave
Weights & Biases toolkit for tracing and evaluating agents.
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Use cases
About W&B Weave
W&B Weave is listed in our evals & observability category and is aimed at builders. Weights & Biases toolkit for tracing and evaluating agents. Pricing, as the maker states it: Free tier + paid plans. Maturity: Mature. We last checked the official link on 2026-10-14.
W&B Weave alternatives
Other evals & observability tools in our directory. See all evals & observability tools →
Kore.ai Autoloop
Optimization engine in Kore.ai Agent Platform Artemis that evaluates agents against business goals, diagnoses failures from traces, applies targeted fixes, and re-verifies; GA Oct 2026.
CoreWeave Forge
One product to run, observe, evaluate and post-train agents (W&B, OpenPipe, sandboxes).
LangSmith
Tracing, evals and monitoring for LLM apps and agents.
Langfuse
Open-source LLM observability, tracing and evals.
Braintrust
Evals and observability platform for AI products.
Arize Phoenix
Open-source tracing and evaluation for LLM apps.
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