facebook/zstd

Maintenance

Active

Human commits, 30 days

19

Human commits, 90 days

49

Human commits, 365 days

132

Bot share of commits, 365 days

18%

Last commit

Oct 6, 2026 (9 days ago)

Last human commit

Oct 6, 2026 (9 days ago)

Authors, 90 days

2

Last release

Feb 19, 2025 (1 year ago)

Median PR merge time

16 hours

Responsiveness: of 21 recent issues, 0% got a maintainer reply. Median first response: n/a.

Sources: Commits, Releases, Merged pull requests, Issues

People

Owner

Organization

Commits sampled

132 since Oct 14, 2025

Authors for half of commits

1

Authors for 80% of commits

2

Contributors

355

Top committers

• Cyan4973: 76% of commits
• Jennifer Lee: 6% of commits
• Usama Arif: 4% of commits
• Integral-Tech: 2% of commits
• NexusXe: 2% of commits

Sources: Commits, Contributors

Stars

Organic, confidence high

Bursts

• Feb 2, 2016 to Feb 4, 2016: about 27 more stars than usual, peak 15 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
• Apr 27, 2016 to Apr 28, 2016: about 30 more stars than usual, peak 15 in one day, a spike that tapers off. Outside explanation: a jump in forks.
• Jul 7, 2016 to Jul 7, 2016: about 29 more stars than usual, peak 30 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
• Aug 31, 2016 to Sep 21, 2016: about 2.5k more stars than usual, peak 614 in one day, a spike that tapers off. Outside explanation: a jump in forks.
• Mar 7, 2017 to Mar 9, 2017: about 47 more stars than usual, peak 27 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
• Jan 24, 2018 to Jan 30, 2018: about 440 more stars than usual, peak 216 in one day, a spike that tapers off. No outside explanation found, so this burst is unexplained.
• Mar 13, 2018 to Mar 15, 2018: about 56 more stars than usual, peak 25 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
• Mar 30, 2018 to Apr 3, 2018: about 311 more stars than usual, peak 149 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
• Nov 25, 2018 to Dec 1, 2018: about 682 more stars than usual, peak 257 in one day, a spike that tapers off. Outside explanation: a Hacker News post, a jump in forks.
• Apr 16, 2019 to Apr 18, 2019: about 133 more stars than usual, peak 75 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
• Jul 19, 2019 to Jul 25, 2019: about 204 more stars than usual, peak 48 in one day, a flat block of stars. Outside explanation: a jump in forks, a jump in issues and pull requests.
• Nov 4, 2020 to Nov 5, 2020: about 50 more stars than usual, peak 41 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
• Dec 17, 2020 to Dec 19, 2020: about 237 more stars than usual, peak 127 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
• May 14, 2021 to May 17, 2021: about 108 more stars than usual, peak 59 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
• Dec 21, 2021 to Dec 23, 2021: about 50 more stars than usual, peak 33 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
• Aug 20, 2022 to Aug 29, 2022: about 493 more stars than usual, peak 147 in one day, a spike that tapers off. Outside explanation: a jump in forks.
• Dec 19, 2022 to Dec 22, 2022: about 290 more stars than usual, peak 137 in one day, a spike that tapers off. Outside explanation: a Hacker News post, a jump in forks, a jump in issues and pull requests.
• Sep 8, 2026 to Sep 10, 2026: about 76 more stars than usual, peak 43 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.

• 1 stars GitHub has since removed (tracked since Oct 14, 2026).

Anyone can buy stars for any repo; bursts alone don't prove the owner did.

• The star history looks organic.

Sources: How star history is analyzed

Risk

Flags

No risk flags.

License

Now

BSD-3-Clause (OSI-approved)

A year ago

BSD-3-Clause (OSI-approved)

Packages

No published packages found.

OpenSSF Scorecard: 8.8 out of 10 (via deps.dev).

Sources: GitHub: facebook/zstd