W&B Weave
Weights & Biases' toolkit for tracing and evaluating AI agents: sessions, turns, tool calls and sub-agents as first-class traces, an evaluation framework with comparisons and leaderboards, built-in signals with Slack alerts, guardrail scorers for toxicity, PII and hallucinations, a playground, and an MCP server so coding agents can read traces and run evals. SDK is open source (Apache-2.0); free plan with 1 GB of trace data a month, Pro from $60 a month.
- Category
- Analytics & MonitoringProduct analytics, error tracking and observability.
- Website
- wandb.aiOfficial site, opens in a new tab.
- Pricing
- See official siteWe only list verified pricing.
Part of the AI Agent Infrastructure collection.
On the LLM observability and eval tools list.
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