PyRank
Z3Prover

z3-solver

The Z3 Theorem Prover
PyPI GitHub Verified repo
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

z3-solver has 6.1M monthly downloads and 12K GitHub stars. Version 4.16.0.0, first published in 2016.

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

It is built on top of importlib-resources. It is used by 182 tracked packages, including tilelang, claripy and crosshair-tool.

Shared Repository
This package shares its GitHub repository (Z3Prover/z3) with 1 other package. Stars, forks, and other GitHub metrics reflect the entire repository.
Downloads
Day
178.8K
Week
1.3M
Month
6.1M
Stars
12.4K
Forks
1.7K
Issues
165
Version
4.16.0.0

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
100
Popularity
87
Adoption
70
Community
80
Provenance
100
How the maintenance status was determined
Last commit
1 days ago
Monthly downloads
6,137,472
• 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
6,137,472
Stars
12,431
Stars per 1k downloads
2.03
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
189,290
Month daily avg
204,582
Momentum
-7.5%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python 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
138 days ago
Total releases
50
Releases/year
5.1
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
330
Monthly downloads
6,137,472
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
88
 
Issue Burden
13.3
per 1k stars
Discussions
80.0
per 1k stars
Fork Ratio
19.7%
contrib / forks
Stale Release
136d
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

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

Downloads by OS

Linux 113.2K
Windows 3.6K
macOS 3.5K

Python Versions

3.12
54.8% 63.1K
3.10
14.4% 16.6K
3.11
13.8% 15.9K
3.13
11.4% 13.1K
3.14
5.6% 6.4K

Top Countries

1. US US
99.0K
2. SG SG
7.2K
3. KR KR
6.3K
4. CN CN
2.5K
5. DK DK
2.0K
6. DE DE
1.3K
7. HK HK
1.2K
8. GB GB
1.2K
9. JP JP
855
10. IE IE
821

Package Information

License
MIT License
First Release
October 11, 2016
Last Release
4 months ago
Last Commit
2 days ago
Latest Version
4.16.0.0
Total Releases
50
Contributors
330
Open PRs
11
Archived
No
Author
The Z3 Theorem Prover Project
Wheels
py2 py3
Keywords
z3 smt sat prover theorem
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links