PyRank
stan-dev

pystan

PyStan, a Python interface to Stan, a platform for statistical modeling. Documentation: https://pystan.readthedocs.io
PyPI GitHub
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

pystan has 1.3M monthly downloads and 365 GitHub stars. Version 3.10.1 supports Python <4.0,>=3.12, first published in 2013.

It is stably maintained under a permissive license, last released in Mar 2026.

It is built on top of aiohttp, clikit and httpstan. It is used by 25 tracked packages, including stan-utility, dsreg and bayesmcdm.

Downloads
Day
38.4K
Week
285.5K
Month
1.3M
Stars
365
Forks
61
Issues
15
Version
3.10.1

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
65
Popularity
53
Adoption
70
Community
30
Provenance
0
How the maintenance status was determined
Last commit
116 days ago
Monthly downloads
1,275,995
Active
Activity within 30 days
• Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
1,275,995
Stars
365
Stars per 1k downloads
0.29
Industry Standard
> 10,000,000 monthly downloads
• Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
40,792
Month daily avg
42,533
Momentum
-4.1%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
<4.0,>=3.12
• Cutting Edge
Minimum supported version is 3.12 or newer
Modern
Minimum supported version is 3.9, 3.10, or 3.11
Legacy
Supports 3.8 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
ISC
• Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
116 days ago
Total releases
68
Releases/year
5.2
Rapid
Last release within 365 days and > 12 releases/year
• Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
17
Monthly downloads
1,275,995
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
• Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
38
 
Issue Burden
41.1
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
27.9%
contrib / forks
Stale Release
No
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 33.6K
Windows 125
macOS 20

Python Versions

3.12
65.7% 21.8K
3.10
15.2% 5.1K
3.11
14.1% 4.7K
3.8
4.1% 1.4K
3.9
0.9% 288

Top Countries

1. US US
24.4K
2. IE IE
2.6K
3. SG SG
2.4K
4. IN IN
1.2K
5. DE DE
675
6. HK HK
647
7. ID ID
376
8. GB GB
263
9. NL NL
189
10. CA CA
169

Package Information

License
ISC
First Release
July 23, 2013
Last Release
3 months ago
Last Commit
3 months ago
Latest Version
3.10.1
Total Releases
68
Contributors
17
Open PRs
0
Archived
No
Author
Allen Riddell
Python Versions
3 3.12
Wheels
cp27 cp33 cp34 cp35 cp36 cp37 cp38 py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links