Best AI Evals

Vendor profileChecked Nov 8, 2026

W&B Weave (CoreWeave)

Weights & Biases, owned by CoreWeave, Inc.; pricing appears under CoreWeave Forge · wandb.ai · Last checked:

  • Hosted SaaS platform
  • Open-source toolkit (Weave, Apache 2.0)
  • Part of a larger platform (CoreWeave Forge, W&B Models)

Company status

Active. CoreWeave (Nasdaq: CRWV) completed its acquisition of Weights & Biases on May 5, 2025 and owns 100% of it. Weave pricing now appears on the CoreWeave Forge pricing page.

Sources 1, 2, 3, 4, 5 · checked 2026-11-08

Capabilities

  • Tracing of agents and functions (Ops and Calls)
  • Evaluations with scorers; remote scorers on logged calls
  • Monitors on production calls using built-in signals and custom monitors
  • Prompt and model experimentation, versioning, feedback collection, and PII redaction

Sources 1, 2, 3, 4, 5 · checked 2026-11-08

Who it tends to fit

  • Teams already using W&B for model training that want LLM tracing and evals in the same place
  • CoreWeave customers using Forge

Sources 1, 2, 3, 4, 5 · checked 2026-11-08

Pricing

Free: $0/month with 1 GB/month Weave data ingestion. Pro: starts at $60/month, billed monthly, with 1.5 GB/month Weave ingestion and $0.10/MB additional ingestion. Enterprise: custom plans, $0.20/MB additional Weave ingestion; volume discounts with annual commitments.

Sources 1, 2, 3, 4, 5 · checked 2026-11-08

Published certifications

Listed as stated by the vendor. Scope can differ by product or subsidiary; request current reports.

Sources 1, 2, 3, 4, 5 · checked 2026-11-08

Limitations to check

  • Pro includes ingestion in GB but prices overage per MB; model your ingestion volume before committing
  • Pro plan is for teams with fewer than 50 employees, per the pricing page

Sources 1, 2, 3, 4, 5 · checked 2026-11-08

Sources

  1. Forge pricing: Free, Pro from $60/month, Enterprise custom; Weave ingestion allowances and overagecoreweave.com/forge-pricingChecked 2026-11-08
  2. May 5, 2025: CoreWeave (Nasdaq: CRWV) completed its acquisition of Weights & Biasescoreweave.com/news/coreweave-completes-acquisition-of-weights-biases-2Checked 2026-11-08
  3. Certified under ISO/IEC 27001:2022, 27017, 27018; compliant with SOC 2 Type 2 and HIPAAwandb.ai/site/security/Checked 2026-11-08
  4. Weave docs: monitors with built-in signals, custom monitors, remote scorers, PII redactionweave-docs.wandb.ai/guides/evaluation/monitorsChecked 2026-11-08
  5. Weave repository license is Apache 2.0github.com/wandb/weaveChecked 2026-11-08

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