No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
pyzmq has 103.6M monthly downloads and 4K GitHub stars. Version 27.1.0 supports Python 3.8+, first published in 2010.
It is stably maintained under a permissive license, last released in Sep 2025.
It is built on top of cffi. It is used by 1,047 tracked packages, including sglang, jupyter-client and ipykernel.
GitHub topics include cython and zeromq.
Package Insights
Package Risks
- No releases in 267 days despite active commits
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
80
Popularity
78
Adoption
70
Community
80
Provenance
100
How the maintenance status was determined
Last commit
33 days ago
Monthly downloads
103,567,969
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
103,567,969
Stars
4,152
Stars per 1k downloads
0.04
•
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
3,322,133
Month daily avg
3,452,266
Momentum
-3.8%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.8
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 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
301 days ago
Total releases
106
Releases/year
6.7
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
188
Monthly downloads
103,567,969
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
80
Issue Burden
11.8
per 1k stars
Discussions
1.7
per 1k stars
Fork Ratio
28.1%
contrib / forks
Stale Release
267d
PR Velocity
Quiet
Weekly Downloads
GitHub Stars
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.
Downloads by OS
Linux
2.4M
Windows
66.2K
macOS
33.6K
Python Versions
3.11
36.4%
790.9K
3.12
19.9%
432.6K
3.10
19.6%
425.7K
3.9
15.6%
338.5K
3.13
8.4%
182.9K
Top Countries
1.
US
2.0M
US
2.
IE
90.7K
IE
3.
SG
66.7K
SG
4.
DE
38.4K
DE
5.
NL
33.3K
NL
6.
IN
27.9K
IN
7.
JP
25.1K
JP
8.
GB
19.5K
GB
9.
CN
14.8K
CN
10.
KR
14.4K
KR
Dependencies
1
Used By
1047
- sglang
- jupyter-client
- ipykernel
- jupyter-server
- jupyter-console
- locust
- vllm
- marimo
- verifiers
- maggma
- aiperf
- circus
- petastorm
- vllm-cpu
- ipyparallel
- kantoku
- spyder-kernels
- spyder
- salt
- lmcache
- bbot
- jupyter-resource-usage
- lmdeploy
- litserve
- torchmonarch
- ert
- parsl
- pytest-salt-factories
- vllm-tpu
- fprime-gds
- cgse-common
- determined
- zerorpc
- ai-dynamo
- backend-ai-manager
- gpudb
- vnpy
- zmq-anyio
- retentioneering
- degirum
- vllm-omni
- cylc-flow
- executorlib
- transferqueue
- psychopy
- backend-ai-agent
- evalml
- nvidia-pytriton
- ducktape
- qulab
Package Information
License
BSD 3-Clause License
First Release
August 29, 2010
Last Release
10 months ago
Last Commit
1 month ago
Latest Version
27.1.0
Total Releases
106
Contributors
188
Open PRs
17
Archived
No
Author
Brian E. Granger, Min Ragan-Kelley
Python Versions
3
3.8
3.9
3.10
3.11
3.12
3.13
Wheels
cp27
cp310
cp311
cp312
cp313
cp314
cp34
cp35
cp36
cp37
cp38
cp39
pp259
pp310
pp311
pp324
pp37
pp38
pp39
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh