Weights & Biases Weave
What is Weights & Biases Weave?
Weights & Biases Weave is an AI application observability platform for ML engineers, AI product teams, platform teams, research teams, and security-conscious enterprises that traces runs end to end and turns them into evaluations, scorers, and production monitoring. It includes Quality, Traces, Evaluations, Playground, and Guardrails, and is used by Canva, OpenAI, and Microsoft. Plans run Free $0/mo, Pro starts at $60/month, Enterprise custom, Personal $0/mo, and Advanced Enterprise custom.
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At a glance
- W&B Weave is best for AI teams who need to trace, evaluate, and monitor applications before production.
- Free $0/mo; Pro Starts at $60/mo; Enterprise Custom plans; Personal $0/mo; Advanced Enterprise Custom plan
- 30 days, no credit card
What does Weights & Biases Weave do?
W&B Weave traces AI application behavior end to end, then turns those traces into evaluations, scorers, and production monitoring. Teams can inspect inputs, outputs, and metadata for each inference, compare prompts and models in the Playground, and use Guardrails to block prompt attacks and harmful outputs. The workflow is built for iterative development: trace a run, score it, adjust it, and monitor the next version without leaving the workspace. At scale, Weights & Biases says the platform is trusted by 900,000 users and 1000+ companies, and customers like Canva and OpenAI use it to move from single-researcher experiments to team-wide workflows. The broader platform supports hundreds of thousands of experiments and 100,000+ experiments in tracked workflows, with model and registry lineage tied into governance and CI/CD. Enterprise options add single-tenant deployment, region choice, secure private connectivity, and customer-managed encryption keys for teams with stricter security requirements.
Why use Weights & Biases Weave?
- Tracing, evaluations, and monitoring live in one workflow, so teams can move from debugging to production checks without stitching together separate tools.
- Guardrails and scorers help teams catch harmful outputs and quality regressions before they reach users.
- Enterprise deployment options include single-tenant setups, region choice, and customer-managed encryption keys for stricter control.
- The platform is already used by 900,000 users and 1000+ companies, which gives buyers confidence it can support real team workflows.
- Support tiers add dedicated success help, Slack or Microsoft Teams channels, and faster response times for enterprise customers.
Who is Weights & Biases Weave for?
- ML engineers who need trace-level visibility into model and application behavior.
- AI product teams who want to compare prompts, models, and outputs before release.
- Platform teams who need governance, lineage, and deployment controls across AI workflows.
- Research teams who want faster experiment iteration and reproducible results.
- Security-conscious enterprises that need private connectivity and access controls.
What are Weights & Biases Weave's key features?
Quality
Score prompts and outputs with AI application evaluations and scorers, then trace runs in W&B Weave to catch regressions before release.
Cost
Track model experiment costs alongside tracing and registry lineage, helping teams spot expensive runs and compare tradeoffs across OpenAI, Anthropic, and Cohere.
Latency
Measure response timing in traced AI applications and agent workflows, so teams can find slow steps and improve user-facing performance.
Safety
Apply guardrails and evaluations to AI applications, with Slack and Microsoft Teams alerts for risky outputs and policy failures.
Traces
Capture AI application tracing for runs, agents, and model calls, giving teams a record they can inspect during debugging and review.
Evaluations
Run AI application evaluations and scorers on traced workflows, using integrations like LangChain, LlamaIndex, and OpenAI to compare outputs consistently.
Playground
Test prompts and agent behavior in a playground before shipping, then connect results to tracing and evaluations for faster iteration.
Agents
Build and iterate agentic AI applications with tracing, guardrails, and integrations such as LangChain, OpenAI, and Anthropic for production debugging.
What does Weights & Biases Weave integrate with?
- Anthropic
- Cohere
- Groq
- EvalForge
- LangChain
- OpenAI
- Together
- LlamaIndex
- Slack
- Microsoft Teams
- PyTorch
- Hugging Face Transformers
- Lightning
- TensorFlow
- Keras
- Scikit-learn
- XGBoost
- NVIDIA
- CoreWeave
- OpenPipe
- Prime Intellect
- ByteDance
- HF Transformers
- Weights & Biases
- W&B Weave
What are Weights & Biases Weave's use cases?
ML engineers debug model behavior
ML engineers who need trace-level visibility into model and application behavior use Weights & Biases Weave to inspect failures end to end, using Traces to see where outputs drift and Evaluations to compare runs. They can pinpoint regressions faster and ship fixes with more confidence.
AI product teams compare releases
AI product teams who want to compare prompts, models, and outputs before release use Weave to test candidate changes in the Playground, then score them with Quality, Cost, Latency, and Safety. That makes it easier to choose the version that performs best without surprising users.
Platform teams govern AI workflows
Platform teams who need governance, lineage, and deployment controls across AI workflows use Weave to keep AI assets organized and auditable, using Traces and Evaluations to track what changed and why. They can enforce safer rollouts and maintain clearer lineage across teams.
Security teams control private deployments
Security-conscious enterprises that need private connectivity and access controls use Weave to run sensitive AI workflows with tighter oversight, using Secure deployment and Guardrails to reduce exposure. They also rely on Monitors to catch risky behavior after launch.
How does Weights & Biases Weave work?
- Connect your first model or application workflow and start capturing Traces so every prompt, response, and tool call is recorded in one place.
- Open the Playground to test prompt changes, then run Evaluations to score outputs against Quality, Cost, Latency, and Safety before release.
- Review failures in the trace view, compare runs side by side, and use Agents to inspect multi-step behavior across your AI workflow.
- Set up Guardrails and Monitors to watch production traffic, flag risky outputs, and keep improving with ongoing feedback from live usage.
How much does Weights & Biases Weave cost?
Free
$0/mo- AI application tracing
- AI application scorers
- AI model experiment tracking
- AI assets registry & lineage tracking
- Community Support
- CI/CD automations
- Slack and email alerts
Pro
Starts at $60/month- Unlimited teams for collaboration
- Team-based access controls
- Service Accounts
- Priority email & chat support
Enterprise
Custom plans- HIPAA compliant option
- Secure private connectivity
- Customer-managed encryption key
- Single Sign On
- Automated user provisioning
- Custom roles
- Audit logs
- Enterprise support package
Personal
$0/mo- 1 user seat
- Experiment tracking
- Registry & lineage tracking
- Run a W&B server locally on any machine with Docker and Python installed
- For personal projects only. Corporate use is not allowed.
Advanced Enterprise
Custom plan- Flexible deployment options
- HIPAA compliant option
- Secure private connectivity
- Customer-managed encryption key
- Single Sign On
- Automated user provisioning
- Custom roles
- Audit logs
- Enterprise support package
Frequently asked questions
What is Weights & Biases Weave?
Weights & Biases Weave is an AI application observability platform for ML engineers, AI product teams, platform teams, research teams, and security-conscious enterprises that traces runs end to end and turns them into evaluations, scorers, and production monitoring. It includes Quality, Traces, Evaluations, Playground, and Guardrails, and is used by Canva, OpenAI, and Microsoft. Plans run Free $0/mo, Pro starts at $60/month, Enterprise custom, Personal $0/mo, and Advanced Enterprise custom.
How much does Weights & Biases Weave cost? Is it free?
Weights & Biases Weave has a free plan, with paid tiers including Pro at Starts at $60/month, Enterprise at Custom plans, Advanced Enterprise at Custom plan. A 30-day free trial is available.
What is Weights & Biases Weave used for? Who is it for?
Weights & Biases Weave is used for Quality, Cost, and Latency. It's built for ML engineers, AI product teams, and Platform teams.
Does Weights & Biases Weave have an API and what does it integrate with?
Weights & Biases Weave doesn't publish a public API. It integrates with Anthropic, Cohere, Groq, EvalForge, LangChain, and 20 more.
Editor's read
Check whether you need Enterprise or Advanced Enterprise for single-tenant deployment, region choice, secure private connectivity, or customer-managed encryption keys. Those controls are not in the lower tiers, so security and deployment requirements can force an upgrade.
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