PyRank
erikrose

parsimonious

The fastest pure-Python PEG parser I can muster
PyPI GitHub
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

parsimonious has 6.3M monthly downloads and 2K GitHub stars. Version 0.11.0, first published in 2012.

It is minimally maintained under a permissive license, last released in Nov 2025.

It is built on top of regex. It is used by 173 tracked packages, including eth-abi, singlestoredb and faster-eth-abi.

Downloads
Day
202.1K
Week
1.4M
Month
6.3M
Stars
1.9K
Forks
135
Issues
57
Version
0.11.0

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
40
Popularity
67
Adoption
70
Community
50
Provenance
0
How the maintenance status was determined
Last commit
237 days ago
Monthly downloads
6,262,767
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
6,262,767
Stars
1,912
Stars per 1k downloads
0.31
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
203,179
Month daily avg
208,759
Momentum
-2.7%
((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
• 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
237 days ago
Total releases
14
Releases/year
1.0
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
29
Monthly downloads
6,262,767
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
52
 
Issue Burden
29.8
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
21.5%
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 133.1K
macOS 3.0K
Windows 2.9K

Python Versions

3.12
40.2% 52.1K
3.11
31.8% 41.3K
3.13
12.5% 16.2K
3.10
8.3% 10.7K
3.14
7.2% 9.4K

Top Countries

1. US US
102.0K
2. SG SG
6.3K
3. IE IE
4.9K
4. DE DE
3.5K
5. NL NL
2.4K
6. KR KR
2.1K
7. CA CA
2.1K
8. AU AU
1.7K
9. JP JP
1.5K
10. RU RU
1.3K

Package Information

License
MIT
First Release
December 1, 2012
Last Release
7 months ago
Last Commit
7 months ago
Latest Version
0.11.0
Total Releases
14
Contributors
29
Open PRs
12
Archived
No
Python Versions
3 3.8 3.9 3.10 3.11 3.12 3.13
Wheels
py3
Keywords
parse parser parsing peg packrat grammar language
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links