No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
bm25s has 1.6M monthly downloads and 2K GitHub stars. Version 0.3.9 supports Python 3.8+, first published in 2024.
It is stably maintained under a permissive license, last released in May 2026.
It is built on top of numpy. It is used by 90 tracked packages, including llama-index-retrievers-bm25, semble and solace-agent-mesh.
GitHub topics include bm25, bm25-l and bm25-plus.
Package Insights
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
80
Popularity
65
Adoption
80
Community
30
Provenance
100
How the maintenance status was determined
Last commit
54 days ago
Monthly downloads
1,600,762
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
1,600,762
Stars
1,724
Stars per 1k downloads
1.08
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
56,005
Month daily avg
53,359
Momentum
+5.0%
((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
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
54 days ago
Total releases
61
Releases/year
27.2
•
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
18
Monthly downloads
1,600,762
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
51
Issue Burden
0.0
per 1k stars
Discussions
29.6
per 1k stars
Fork Ratio
18.0%
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
20.7K
macOS
378
Windows
329
Python Versions
3.12
61.8%
13.0K
3.13
18.6%
3.9K
3.11
13.5%
2.8K
3.14
4.9%
1.0K
3.10
1.1%
238
Top Countries
1.
US
20.2K
US
2.
GB
896
GB
3.
DE
510
DE
4.
NL
394
NL
5.
GR
303
GR
6.
IN
270
IN
7.
SG
260
SG
8.
HK
190
HK
9.
IE
159
IE
10.
JP
129
JP
Dependencies
1
23 optional dependencies
- black[dev]
- black[full]
- huggingface-hub[hf]
- huggingface-hub[full]
- jax[selection]
- jax[full]
- mcp[full]
- mcp[mcp]
- numba[core]
- numba[full]
- orjson[full]
- orjson[core]
- pystemmer[core]
- pystemmer[full]
- pystemmer[stem]
- pytrec-eval[evaluation]
- pytrec-eval[full]
- rich[cli]
- rich[full]
- scipy[full]
- scipy[indexing]
- tqdm[core]
- tqdm[full]
Used By
90
- llama-index-retrievers-bm25
- semble
- solace-agent-mesh
- brainpalace-rag
- igrep-tme
- nauro-core
- clovis
- lean-explore
- kodit
- flexrag
- flashrag-dev
- llm-join
- bm25
- stackone-ai
- heph
- agentor
- nexus-ai-fs
- nbrag
- isage-neuromem
- nl2sqlevaluator
- ovos-solver-bm25-plugin
- bigtools
- mcp-agents
- vortexa
- observee
- vibe-llama
- itk-bm25s-extended-fastembed
- voyager-index
- knowledge-core-engine
- katalyst
- agentvis
- strive-ranker
- rag-colls
- poma-memory
- schema-search
- forgejudge
- zoty
- discord-mcp
- kssrag
- codefox
- tangbao
- bm25-benchmarks
- stark-qa
- gnosys-strata
- nom-vn
- dokis
- hybrid-retrieval-scoring
- rag-forge-core
- patha-memory
- hebbian-vault
GitHub Topics
Tags from the package's GitHub repository describing what it does.
Package Information
License
MIT License
First Release
April 10, 2024
Last Release
1 month ago
Last Commit
1 month ago
Latest Version
0.3.9
Total Releases
61
Contributors
18
Open PRs
1
Archived
No
Author
Xing Han Lù
Python Versions
3
Wheels
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh