How PyStan is used
PyStan is a dependency in 0 of the 6,208 public GitHub projects set up for AI coding agents that we scanned, too few to describe it from them alone. Our scan also samples projects by dependency (Solana 2,661, Ethereum and EVM 1,496, 3D and games 2,818, agent frameworks and SDKs 10,983); counting those, it appears in 31 projects, and what it is used with below comes from all of them. Projects that use it most often also use attrs (100.0%), Cython (100.0%), holidays (100.0%).
PyStan popularity over time
Gid Score 31: downloads 47, use in agent projects 34, GitHub stars 0, downloads trend 40 (each 0-100). How it is calculated.
Often used with PyStan
| attrs | 100.0% of PyStan projects · 144.4× more than average |
|---|---|
| Cython | 100.0% of PyStan projects · 1552.0× more than average |
| holidays | 100.0% of PyStan projects · 3104.0× more than average |
| joblib | 100.0% of PyStan projects · 141.1× more than average |
From all 31 projects in our scan that use PyStan, including the dependency samples.
How PyStan is funded
Open Collective: Stan
| Received, last 12 months | $60,109 Oct 2025 – Sep 2026 |
|---|---|
| Estimated annual budget | $26,248 Open Collective's estimate |
| Balance | $240,370 |
| Raised since the start | $357,445 · $117,074 paid out |
| Typical month median, last 12 months | $0 · $28 over 24 months |
| Last 12 months vs the 12 before | +3633% |
| Contributors, last 12 months | 2 |
Top company backers all time
| NumFOCUS | $29,297 since May 2024 |
|---|
Apr 2022Sep 2026
Money by month. First money received in Apr 2022. The typical month is the median: one big one-off donation does not move it.
The same collective is named by 1 more tool in our catalog: CmdStanPy.
Open Collective lists this collective for the stan-dev organization on GitHub, so the money is for all of its projects, not PyStan alone.
USD after payment processor fees, as Open Collective reports it; fiscal host NumFOCUS. Source
GitHub Sponsors
| @stan-dev | 7 current sponsors |
|---|
GitHub shows how many people and companies sponsor an account, not how much they pay.
Ways to fund PyStan
As the maintainers list them in FUNDING.yml on GitHub. Checked Oct 20, 2026.
Install
| Package | pip install pystan |
|---|---|
| Main stacks | Python (31) |
| Example projects | BlackArbsCEO/Adv_Fin_ML_Exercises, moizsaifee/kaggle-jigsaw-multilingual-toxic-comment-classification-3rd-place-solution, tomerwolgithub/question-decomposition-to-sql, m-abbas-ansari/SuperResolution-DEMs, linktianx/RSRD_BWAS |
Alternatives to PyStan
In our scan, none of the most used tools in ML and data science does the same job as PyStan: they are add-ons, companions or tools for a different task.
More in ML and data science: NumPy pandas scikit-learn SciPy PyTorch Sentence Transformers Hugging Face Transformers NetworkX