W&B Weave

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

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About

W&B Weave is ranked #6 of 32 in AI agent observability tools on Inferse. It runs on API, Linux, macOS, Self-hosted, Web, Windows. There is a free plan. A free trial is offered. Paid plans start at $60/mo.

Compared on AI agent observability tools

Free plan: Yessite.wandb.ai
Paid from: $60/mosite.wandb.ai

Facts

Purpose: W&B Weave provides observability and continuous improvement tools for production AI agents.site.wandb.ai · 30 Sept 2026
Tracing: Weave organizes traces into sessions and turns and represents steps, tools, and sub-agents as first-class concepts.site.wandb.ai · 30 Sept 2026
Monitoring: Built-in and custom signals capture and classify agent interactions, and alerts can be routed through Slack notifications and webhook automations.site.wandb.ai · 30 Sept 2026
Evaluations: Weave provides an evaluation framework with comparisons and visualizations to help identify regressions before deployment.site.wandb.ai · 30 Sept 2026
Playground: Playground lets users compare models and prompting techniques against production traces.site.wandb.ai · 30 Sept 2026
Guardrails: Pre-built safety scorers include toxicity, bias, PII detection, and hallucinations, while quality scores include coherence, fluency, and context relevance.site.wandb.ai · 30 Sept 2026
Integrations: W&B says Weave works with popular LLM frameworks including LangChain and LlamaIndex and supports models from OpenAI, Meta, Amazon Bedrock, and Anthropic.site.wandb.ai · 30 Sept 2026
SDKs and API: Weave provides Python and TypeScript libraries and supports sending OpenTelemetry traces to its OTLP endpoint.docs.wandb.ai · 30 Sept 2026
Security: W&B states that its platform is certified to ISO/IEC 27001:2022, ISO/IEC 27017:2015, and ISO/IEC 27018:2019 and is compliant with SOC 2 Type 2 and HIPAA standards.site.wandb.ai · 30 Sept 2026
Encryption: W&B states that data is encrypted in transit using TLS 1.2+ and at rest using AES 256.site.wandb.ai · 30 Sept 2026
Enterprise controls: Enterprise pricing lists options including single sign-on, audit logs, secure private connectivity, and customer-managed encryption keys.site.wandb.ai · 30 Sept 2026
Support: The Pro plan includes priority email and chat support, while Enterprise includes an enterprise support package.site.wandb.ai · 30 Sept 2026
Usage limits: The pricing comparison lists 1 GB per month of Weave data ingestion on Free and 1.5 GB per month on Pro, with additional Pro ingestion priced at $0.10 per MB.site.wandb.ai · 30 Sept 2026
Company: Weights & Biases says it was founded in 2017 by Lukas Biewald, Chris Van Pelt, and Shawn Lewis and was acquired by CoreWeave in May 2025.site.wandb.ai · 30 Sept 2026