PyRank
Fatal1ty

mashumaro

Fast and well tested serialization library
PyPI GitHub Verified repo
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

mashumaro has 38.9M monthly downloads and 926 GitHub stars. Version 3.22 supports Python 3.10+, first published in 2018.

It is actively maintained under a permissive license, last released in May 2026.

It is built on top of typing-extensions. It is used by 220 tracked packages, including dbt-adapters, dbt-core and dbt-common.

GitHub topics include serialization, deserialization and marshalling.

Downloads
Day
1.1M
Week
8.2M
Month
38.9M
Stars
926
Forks
62
Issues
15
Version
3.22

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
90
Popularity
59
Adoption
70
Community
35
Provenance
100
How the maintenance status was determined
Last commit
23 days ago
Monthly downloads
38,880,289
• 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
38,880,289
Stars
926
Stars per 1k downloads
0.02
• 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
1,174,983
Month daily avg
1,296,010
Momentum
-9.3%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python 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
Apache-2.0
• 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
42 days ago
Total releases
94
Releases/year
12.0
• 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
18
Monthly downloads
38,880,289
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
48
 
Issue Burden
16.2
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
29.0%
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 813.7K
Windows 2.6K
macOS 2.3K

Python Versions

3.11
38.6% 300.0K
3.12
38.5% 298.9K
3.10
10.8% 84.1K
3.13
6.7% 52.2K
3.9
5.4% 41.6K

Top Countries

1. US US
484.6K
2. NL NL
65.2K
3. IE IE
59.3K
4. DE DE
49.0K
5. BR BR
33.7K
6. AU AU
28.9K
7. GB GB
18.1K
8. CA CA
16.7K
9. JP JP
12.3K
10. SG SG
11.7K
GitHub Topics
Tags from the package's GitHub repository describing what it does.

Package Information

License
Apache-2.0
First Release
September 11, 2018
Last Release
1 month ago
Last Commit
3 weeks ago
Latest Version
3.22
Total Releases
94
Contributors
18
Open PRs
8
Archived
No
Python Versions
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

Links