PyRank
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annoy

Approximate Nearest Neighbors in C++/Python optimized for memory usage and loading/saving to disk
PyPI GitHub
More links
Download Stats
Monthly downloads
983.6K
Weekly downloads
248.1K
GitHub stars *
14.3K

Downloads in the 30 and 7 days to October 10, 2026. Refreshed weekly.

Package Information

Latest Version
1.17.3
Requires Python
Not specified
Licence
Apache License 2.0
Last Release
3 years ago
Author
Erik Bernhardsson
First Release
March 24, 2014
Total Releases
43
Python Versions
2.6 2.7 3.3 3.4 3.5 3.6 3.7 3.8 3.9
No reported malware or high/critical advisories · Details

The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
50
Popularity
88
Adoption
79
Community
60
Provenance
0
How the maintenance status was determined
Last commit
351 days ago
Monthly downloads
983,584
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
983,584
Stars
14,315
Stars per 1k downloads
14.55
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
35,440
Month daily avg
32,786
Momentum
+8.1%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
More insights and metrics
Python version support tiers
requires_python
Not specified
Cutting Edge
Minimum supported version is 3.14 or newer
Modern
Minimum supported version is 3.11 to 3.13
Legacy
Supports 3.10 or older (or Python 2)
• Unknown
No requires_python specified or unparseable
Package does not declare a minimum Python version.
License categories
License
Apache License 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
1219 days ago
Total releases
43
Releases/year
3.4
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
74
Monthly downloads
983,584
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
61
 
Issue Burden
5.0
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
6.0%
contrib / forks
Stale Release
867d
 
PR Velocity
Quiet
 
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 19.6K
Windows 182
macOS 170

Python Versions

3.12
39.8% 7.4K
3.11
27.3% 5.0K
3.10
19.4% 3.6K
3.8
8.8% 1.6K
3.13
4.8% 881

Top Countries

1. US US
16.7K
2. IN IN
1.7K
3. SG SG
397
4. NL NL
276
5. GB GB
170
6. CN CN
167
7. JP JP
135
8. KR KR
104
9. TW TW
102
10. HK HK
84

Weekly Downloads

GitHub Stars *

Dependencies

0
No dependencies

Used By

84
View all 84 dependents

Repository details

Forks
1.2K
Issues
72
Last Commit
11 months ago
Contributors
74
Open PRs
18
Archived
No

Data and sources

Tracking Since
September 26, 2026
Data Updated
October 11, 2026
Data Freshness
Fresh
Keywords
nns approximate nearest neighbor search
Sources and methodology