Weights & Biases Weave
W&B Weave is Weights & Biases' toolkit for tracing, evaluating, and monitoring LLM apps and agents in production.
Last verified:
W&B Weave is the GenAI observability and evaluation surface of Weights & Biases, the ML platform founded in 2017 and acquired by CoreWeave in 2025. Weave automatically traces LLM calls via a lightweight @weave.op decorator, capturing inputs, outputs, cost, latency, and eval scores, and is billed alongside W&B Models on a seat-plus-usage model (storage and Weave ingestion metering). It ships an official hosted MCP server exposing Models and Weave data to AI coding agents, and supports both SaaS and self-hosted/enterprise deployment.
Pricing
| Tier | Price | Key features |
|---|---|---|
| Free | $0/monthly | AI app evaluations, tracing, scorers, Experiment tracking, Assets registry & lineage, Community support |
| Pro | $60/monthly | Unlimited collaboration teams, Team-based access controls, Service accounts, Priority support, CI/CD automations |
| Enterprise | Custom | Single-tenant deployment, HIPAA compliance, Customer-managed encryption keys, SSO, Automated user provisioning, Audit logs |
Source: https://wandb.ai/site/pricing/
Agent-readiness
- Discoverability
- 90/100
- Machine-readable content
- 90/100
- Programmatic access
- 90/100
- MCP / agent support
- 85/100
- Self-serve transactability
- 75/100
- Transparency
- 75/100
Security & compliance
- SSO / SAML
- Yes
- Encryption at rest
- Yes
- Encryption in transit
- Yes
- Audit log
- Yes
- Pentest report
- Not publicly documented
"Not publicly documented" means Crail found no public evidence either way — not a confirmed absence. See our methodology. Trust center: https://wandb.ai/site/security/.
FAQ
Does Weights & Biases Weave have a free tier?
Yes, Weights & Biases Weave offers a free tier or free trial.
Can you buy Weights & Biases Weave without talking to sales?
Yes, Weights & Biases Weave can be purchased self-serve without a sales call.
Does Weights & Biases Weave have an official MCP (Model Context Protocol) server?
Yes, Weights & Biases Weave publishes an official MCP server (https://github.com/wandb/wandb-mcp-server).
What compliance certifications does Weights & Biases Weave hold?
Weights & Biases Weave holds: SOC 2 Type II, HIPAA.
What people are saying on Reddit & Hacker News
Real, publicly-posted discussion — not a Crail-verified review. Always linked back to the original post so you can read it in context.
Reviews
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Methodology & disclosure
Data verified via agent crawled, last checked 2026-07-26. Agent-readiness methodology version crail-ar-v0.1. No vendor payment influences these scores — see our methodology page.