No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
pytorch-msssim has 652K monthly downloads and 1K GitHub stars. Version 1.0.0, first published in 2019.
It is showing limited recent maintenance under a permissive license, last released in May 2023.
It is used by 29 tracked packages, including nerfstudio, compressai and biapy.
GitHub topics include ssim, ms-ssim and pytorch.
Package Insights
Package Risks
- Moderate bus factor: only 9 contributor(s) for this download volume
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
20
Popularity
64
Adoption
68
Community
30
Provenance
0
How the maintenance status was determined
Last commit
1056 days ago
Monthly downloads
651,986
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
651,986
Stars
1,246
Stars per 1k downloads
1.91
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
21,299
Month daily avg
21,733
Momentum
-2.0%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
Not specified
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
Package does not declare a minimum Python version.
License categories
License
MIT License
•
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
1139 days ago
Total releases
8
Releases/year
1.1
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
9
Monthly downloads
651,986
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
39
Issue Burden
20.1
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
7.1%
contrib / forks
Stale Release
82d
PR Velocity
Quiet
Weekly Downloads
GitHub Stars
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.
Downloads by OS
Linux
4.4K
Windows
415
macOS
125
Python Versions
3.10
39.8%
1.9K
3.12
37.6%
1.8K
3.11
13.4%
644
3.13
6.1%
291
3.8
3.1%
150
Top Countries
1.
US
3.9K
US
2.
SG
247
SG
3.
CN
102
CN
4.
GB
78
GB
5.
JP
71
JP
6.
DE
66
DE
7.
NL
53
NL
8.
KR
42
KR
9.
IN
37
IN
10.
TW
36
TW
Dependencies
0
No dependencies
Used By
29
GitHub Topics
Tags from the package's GitHub repository describing what it does.
Package Information
License
MIT License
First Release
May 11, 2019
Last Release
3 years ago
Last Commit
2 years ago
Latest Version
1.0.0
Total Releases
8
Contributors
9
Open PRs
3
Archived
No
Author
Gongfan Fang
Python Versions
3
Wheels
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh