# 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.

- Official site: https://wandb.ai/site/weave/
- Category: [Analytics & Monitoring](https://digidle.com/category/analytics/)
- Tags: llm-observability, evals, agents
- Pricing: not verified by Digidle; see the official site.
- Listing page: https://digidle.com/tools/wandb-weave/
- Alternatives page: https://digidle.com/alternatives/wandb-weave/

## In collections

- [AI Agent Infrastructure](https://digidle.com/collections/ai-agent-infrastructure/)

## Best-of lists

- [LLM observability and eval tools](https://digidle.com/best/llm-observability-evals/)

## Other Analytics & Monitoring tools

- [PostHog](https://digidle.com/tools/posthog.md): Open-source product analytics suite with session replay, feature flags and experiments.
- [Sentry](https://digidle.com/tools/sentry.md): Application monitoring for error tracking, tracing and performance.
- [Plausible](https://digidle.com/tools/plausible.md): Lightweight, privacy-friendly, open-source web analytics.
- [Kerno](https://digidle.com/tools/kerno.md): AI runtime QA for backends: tests user flows against your real stack from inside MCP-capable coding agents.
- [Tiden](https://digidle.com/tools/tiden.md): Intent verification for coding agents: keeps versioned specs beside your code and checks agent changes against what you asked for.
- [Navige](https://digidle.com/tools/navige.md): Sits between AI agents and the models they pay for to cut spend via caching, smart routing, context trimming and loop guards.
- [Parseable](https://digidle.com/tools/parseable.md): Open-core (AGPL-3.0) observability platform written in Rust: logs, metrics and traces in one binary on S3-compatible object storage, with SQL and PromQL, OpenTelemetry-native ingest, self-hosted or as Parseable Cloud.
- [Pug](https://digidle.com/tools/pug.md): Open-source (AGPL-3.0) product analytics with unified user profiles: autocapture, trends, funnels, retention and user flows; self-host it or start free on EU-hosted, cookieless Pug Cloud.

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Source: Digidle Tools (https://digidle.com/), a curated directory of developer and vibe-coding tools. Full index: https://digidle.com/llms.txt