W&B Weave
Weights & Biases toolkit for tracing and evaluating LLM agents from Python or TypeScript, hosted by W&B or run on a licensed server.
By Weights & Biases (CoreWeave) · wandb.ai/site/weave
Package download activity
Each package is shown on its own; packages that can be installed together are never added up. Week 2026-W40 (2026-09-28 to 2026-10-04).
npmweave · headline (ranked)
623,550 downloads in the week, +6.9% vs prior week · rank 5 on npm
Reproduce this number (npm API) · registry metadata (mapping checked 2026-10-07)
PyPIweave · headline (ranked)
239,276 downloads in the week, +28.3% vs prior week · rank 15 on PyPI
Reproduce this number (ClickHouse SQL) · registry metadata (mapping checked 2026-10-07)
GitHub stars
wandb/weave: 1,137 stars (rank 31). Stars are a point-in-time count of a repository's bookmarks, not people using the tool.
Series starts 2026-W40 (1,137).
Facts
| Categories | Tracing & observability, Evaluation | |
|---|---|---|
| Status | Generally available | |
| Licence | Apache-2.0 (open core) | source, checked 2026-10-07 |
| Self-host | Yes | source, checked 2026-10-07 |
| OpenTelemetry | Native (OTLP) | source, checked 2026-10-07 |
| Pricing model | usage | |
| Entry price | $60/mo; W&B Pro plan (page redirected from wandb.ai/site/pricing); Weave ingestion 1.5 GB/month on Pro then $0.10/MB; Free plan $0 includes AI application tracing | source, checked 2026-10-07 |
| Free tier | Yes | |
| Measurability | Measured (mapped SDK packages) |
Facts last verified 2026-10-07 on first-party pages. Prices as published, taxes excluded; non-USD prices are not converted.
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