Statistics · Vendor site 2026-10-04
Stan is open-source Bayesian modeling software with a probabilistic programming language, math library, and interfaces for Python, R, Julia, and the shell. Researchers use it for hierarchical models, time series, and validated inference workflows backed by extensive documentation and community forums.
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Free
Free
Homepage and documentation present Stan as free software with open community resources and example models.
No retained pricing changes yet. A current price alone does not establish a historical trend.
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Yes. Stan has an ongoing free plan. Homepage and documentation present Stan as free software with open community resources and example models.
Stan is listed as free. No paid plan with a published price was found.
We could not confirm API access for Stan.