No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
mutmut has 2.3M monthly downloads and 1K GitHub stars. Version 3.6.0 supports Python 3.10+, first published in 2016.
It is actively maintained under a permissive license, last released in Jun 2026.
It is built on top of click, coverage and libcst. It is used by 3 tracked packages, including alvin-cli, agentic-test-forge and polyphony.
GitHub topics include testing and mutation-testing.
Package Insights
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
90
Popularity
65
Adoption
80
Community
50
Provenance
0
How the maintenance status was determined
Last commit
8 days ago
Monthly downloads
2,311,965
•
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
2,311,965
Stars
1,337
Stars per 1k downloads
0.58
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
84,602
Month daily avg
77,066
Momentum
+9.8%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.10
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
BSD-3-Clause
•
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
31 days ago
Total releases
62
Releases/year
6.5
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
48
Monthly downloads
2,311,965
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
53
Issue Burden
30.7
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
30.8%
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
80.2K
macOS
1.7K
Windows
1.1K
Python Versions
3.12
52.0%
42.6K
3.11
21.2%
17.4K
3.13
15.6%
12.8K
3.14
9.1%
7.5K
3.10
2.0%
1.7K
Top Countries
1.
US
77.5K
US
2.
DE
2.0K
DE
3.
IE
402
IE
4.
JP
350
JP
5.
FI
331
FI
6.
GR
301
GR
7.
GB
290
GB
8.
AU
228
AU
9.
SG
202
SG
10.
BR
188
BR
Used By
3
GitHub Topics
Tags from the package's GitHub repository describing what it does.
Package Information
License
BSD-3-Clause
First Release
December 1, 2016
Last Release
1 month ago
Last Commit
1 week ago
Latest Version
3.6.0
Total Releases
62
Contributors
48
Open PRs
3
Archived
No
Author
Anders Hovmöller
Python Versions
3
3.10
3.11
3.12
3.13
3.14
Wheels
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh