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.
Statisticians, data scientists, and researchers who need flexible Bayesian inference beyond fixed-form ML libraries.
You install Stan toolchains locally or in CI; the project does not provide a managed cloud inference service on mc-stan.org.
Stan combines a probabilistic programming language with multi-language interfaces so teams can fit and validate hierarchical models in production workflows.
What it can do
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Bayesian focus | Homepage introduces Stan for sophisticated Bayesian modeling and interpretable results on complex data. | Facts sourced | 2026-10-04 |
| Interfaces | Site lists Python, Julia, R, and Unix shell interfaces for running Stan programs. | Facts sourced | 2026-10-04 |
| Community docs | Navigation links forums, tutorials, case studies, and prior-choice guidance for practitioners. | Facts sourced | 2026-10-04 |
Understand the total cost
Free
Free
Homepage and documentation present Stan as free software with open community resources and example models.
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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.
Homepage and documentation present Stan as free software with open community resources and example models.. This record lists ongoing free access; check the plan limits before starting.
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Not confirmed. API access and subscription access may have different terms; consult the linked sources.
You install Stan toolchains locally or in CI; the project does not provide a managed cloud inference service on mc-stan.org.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
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