Side by side

Sacred vs Weights & Biases

Both stand on experiment tracking. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Choose Weights & Biases if your work needs experiment tracking alongside tools for evaluating and monitoring AI applications, with registry and deployment options. The free plan has defined seat and storage quotas, while teams above Pro’s stated employee guideline must transition to Enterprise. Consider the Personal plan only for personal projects, since corporate use is not allowed.

Visit Weights & Biases

The facts

	Sacred	Weights & Biases
Free plan	Yes	Yes
Open source	Not published	No
Runs on	Linux, Mac, Windows	Android, API, iPhone, Linux, Mac, Self-hosted, Web, Windows
Lowest paid plan	Not published	Pro: $60 a month
Plans published	None	5
Maker	Not published	Not published
Website	sacred.readthedocs.io	wandb.ai
On experiment tracking	#15 of 22	#11 of 22

Sacred: what it does well

Weights & Biases: what it does well

Tracks and visualizes machine learning experiments.
Sweeps supports hyperparameter optimization.
Weave includes tracing, evaluations, and monitoring.
Registry tracks versions, aliases, lineage, and access control.
Integrates with OpenAI, Anthropic, LangChain, and others.

What to know first

Free plan is limited to five model seats and 5 GB monthly storage.
Free plan includes 1 GB monthly Weave data ingestion.
Pro is for early-stage teams with fewer than 50 employees.
Personal plan is restricted to personal projects; corporate use is not allowed.

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