Weights & Biases Weave
Weights & Biases, Inc.
Deliver AI with confidence.
Last verified April 22, 2026About Weights & Biases Weave
Weights & Biases (W&B) is a San Francisco-based MLOps and LLMOps platform founded in 2017. Weave is W&B's product layer purpose-built for LLM observability, evaluation, and governance. It provides automatic tracing of LLM calls (inputs, outputs, latency, cost), evaluation pipelines with human and automated scoring, dataset versioning, and guardrails to block prompt attacks and harmful outputs. Weave integrates with major LLM providers including OpenAI, Anthropic, Google Gemini, and frameworks such as LangChain and LlamaIndex. For AI compliance, W&B runs EU AI Act-focused webinar series demonstrating how Weave can generate compliance dossiers for high-risk AI systems, providing audit trails and evidence generation. The platform holds SOC 2 Type II certification. Enterprise tier includes SSO, RBAC, and private cloud deployment. W&B has raised $305M total and was valued at $1.25B in 2023.
Framework coverage
Capabilities
Features Weights & Biases Weave markets publicly. Inclusion means the capability is documented — not that it's best-in-class.
AI Model Inventory
Centralized registry of all AI/ML models in use across the organization, with ownership, lifecycle stage, and risk classification.
Model Monitoring
Production monitoring for performance, drift, data quality, and fairness regressions.
Explainability
SHAP, LIME, counterfactual, and feature-importance explanations for model decisions.
Audit Evidence Collection
Automated collection, hashing, and retention of evidence (model cards, test results, approvals) for audit.
LLM Guardrails & Content Filtering
Runtime guardrails that block or redact unsafe prompts and responses in production LLM applications.
Integrations
Documented by Weights & Biases Weave in public product materials.
- OpenAI API
- Anthropic API
- Weights & Biases
Pricing
Free tier available for individuals. Team tier at published per-seat pricing. Enterprise tier (SSO, RBAC, private cloud) is contact sales. See https://wandb.ai/site/pricing for current tiers.
Sources
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