PyRank
Blosc

blosc2

A high-performance library for compressed ND arrays and columnar tables, with compute and indexing engines
PyPI GitHub
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

blosc2 has 4.3M monthly downloads and 207 GitHub stars. Version 4.7.0 supports Python 3.11+, first published in 2021.

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

It is built on top of msgpack, ndindex and numexpr. It is used by 62 tracked packages, including tables, nnunetv2 and acvl-utils.

GitHub topics include compression, computational and lazy-evaluation.

Downloads
Day
151.2K
Week
876.1K
Month
4.3M
Stars
207
Forks
47
Issues
58
Version
4.7.0

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
100
Popularity
49
Adoption
60
Community
60
Provenance
0
How the maintenance status was determined
Last commit
5 days ago
Monthly downloads
4,254,051
• 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
4,254,051
Stars
207
Stars per 1k downloads
0.05
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
125,159
Month daily avg
141,802
Momentum
-11.7%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
>=3.11
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
7 days ago
Total releases
105
Releases/year
20.3
• 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
37
Monthly downloads
4,254,051
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
69
 
Issue Burden
280.2
per 1k stars
Discussions
38.6
per 1k stars
Fork Ratio
78.7%
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 67.5K
Windows 2.9K
macOS 2.8K

Python Versions

3.12
41.3% 28.6K
3.11
24.6% 17.0K
3.10
24.5% 16.9K
3.13
5.0% 3.5K
3.14
4.6% 3.2K

Top Countries

1. US US
57.5K
2. IE IE
5.1K
3. NL NL
2.5K
4. JP JP
2.4K
5. AU AU
2.3K
6. SG SG
1.4K
7. CN CN
940
8. DE DE
764
9. GB GB
645
10. CA CA
625
GitHub Topics
Tags from the package's GitHub repository describing what it does.

Package Information

License
BSD-3-Clause
First Release
May 7, 2021
Last Release
1 week ago
Last Commit
6 days ago
Latest Version
4.7.0
Total Releases
105
Contributors
37
Open PRs
2
Archived
No
Python Versions
3 3.11 3.12 3.13 3.14
Wheels
cp310 cp311 cp312 cp313 cp314 cp38 cp39
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links