SSealbook

Open source by the numbers: licenses, languages and maintenance of GitHub’s top repos

What every GitHub repository with 1,000+ stars tells us. Figures update with each data refresh.

Updated 2026-10-19 · Sealbook

Sealbook tracks every public GitHub repository with at least 1,000 stars. The numbers below are computed live from that dataset, not estimated.

65,712repos with 1,000+ stars
308Mstars in total
43%pushed code in the last 90 days
16%have no license

Which licenses do popular projects use?

MIT
24,824 38%
Apache-2.0
10,729 16%
No license
10,212 16%
Custom / other
7,698 12%
GPL-3.0
4,544 7%
AGPL-3.0
1,577 2%
BSD-3-Clause
1,552 2%
GPL-2.0
1,031 2%
CC0-1.0
652 1%
Everything else
2,893 4%

Permissive licenses (MIT, Apache, BSD) dominate: they let companies use the code commercially with few conditions. A notable share of popular repos have no license at all, which legally means nobody may reuse the code. Always check before you build on a project.

How many are still maintained?

Active
28,285 43%
Slowing
9,182 14%
Stale
22,843 35%
Archived
5,402 8%

Stars measure past popularity. A project can have tens of thousands of stars and no commits in years. We label a repo Active if code was pushed in the last 90 days, Slowing within a year, and Stale after that.

Which languages lead?

Python
11,883 18%
JavaScript
7,784 12%
TypeScript
6,528 10%
Go
4,047 6%
Java
3,851 6%
C++
3,404 5%
C
2,514 4%
Rust
2,415 4%
C#
1,854 3%
Shell
1,595 2%
PHP
1,549 2%
HTML
1,541 2%

What do they do?

Frontend, UI & design
5,401 8%
AI agents & LLM apps
5,147 8%
Web & backend frameworks
4,712 7%
Machine learning & data science
4,679 7%
Learning resources & lists
4,138 6%
Desktop & everyday apps
4,082 6%
Developer tools, CLI & editors
4,070 6%
Mobile development
4,059 6%
DevOps, cloud & infrastructure
3,295 5%
Security & hacking
2,493 4%
Databases & data engineering
2,010 3%
Self-hosted apps (SaaS alternatives)
1,859 3%
Games & game engines
1,051 2%
Hardware, IoT & embedded
887 1%
Blockchain & crypto
537 1%
Programming languages & runtimes
501 1%

Repos without topics or a clear description are not categorised.