Weights & Biases review: Experiment tracking and LLM app tracing for AI teams, with a self-hosted server
Experiment tracking and LLM app tracing for AI teams, with a self-hosted server
Prices not verified, free plan: yes, free trial: Free Enterprise Trial license for the self-hosted server.
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What Weights & Biases does
Weights & Biases is a developer platform for people who build machine learning models and AI applications. The Models side covers experiment tracking, hyperparameter sweeps, tables for exploring data, and a registry for publishing models and datasets. The Weave side is aimed at AI applications and agents, and includes traces for debugging, evaluations, guardrails and monitors. Artifacts, reports and an SDK form a shared core.
The homepage shows short code examples for adding logging to projects that use PyTorch, TensorFlow, Keras, Lightning, HF Transformers, Scikit-LEARN, XGBoost, LangChain and LlamaIndex. The vendor also announces an iOS app for following training runs, and lists compliance certifications and standards for enterprise buyers.
The pricing page covers privately hosted setups only. It is restricted to personal projects, so corporate use is excluded. The Advanced Enterprise plan is listed as a custom plan with flexible deployment, single sign-on, audit logs, custom roles and an enterprise support package, plus a free Enterprise Trial license. Academic researchers can apply for a free offer with unlimited projects, teams, and 200GB free cloud storage. The pricing page says prices for the cloud-hosted product moved to CoreWeave Forge, and the homepage says the company is now part of CoreWeave Forge.
- Experiment tracking
- Registry and lineage tracking
- Traces for agents and AI applications
- Evaluations of agentic AI systems
- Hyperparameter sweeps
- Guardrails against prompt attacks
- Shareable reports
- Self-hosted server with Docker and Python
Pros and cons
Pros
- Covers classic model experiment tracking and LLM or agent tracing in one platform
- Logging examples shown for many common ML frameworks, including PyTorch and Keras
- Advanced Enterprise lists single sign-on, audit logs, custom roles and a HIPAA compliant option
- Free academic research offer with 200GB free cloud storage
Cons
- Personal plan is limited to personal projects; corporate use is excluded
- Advanced Enterprise has no published price, only a custom plan via contact
- Self-hosting leaves data storage and backup to the customer
- Personal plan includes only 1 user seat
Our take
Weights & Biases suits ML engineers and AI application teams who want one place to log experiments, compare runs and trace LLM or agent behavior. Cloud-hosted prices are not on this page, and self-hosting means you handle your own storage and backups. Buyers who want published team prices will not find them on the official pricing page we reviewed.
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Weights & Biases pricing
Prices not verified — the official pricing could not be confirmed; check the vendor's site: official pricing page.
Frequently asked questions
How much does the Advanced Enterprise plan cost?
The pricing page shows it as a custom plan with a contact button and no published price. A free Enterprise Trial license is mentioned for the self-hosted server.
What do I need to self-host?
Docker and Python installed on your machine. The page says the server can run on Linux, macOS, or Windows systems that meet these requirements.
Is there a plan for academics?
The pricing page describes a free-forever offer for academic research with unlimited projects, teams, and 200GB free cloud storage, with an application step.
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