# [meta/zstd](https://github.com/meta/zstd) Zstandard - Fast real-time compression algorithm 28.2k stars · 2.7k forks · C Quick update: star history is from the full report of Oct 14, 2026. Caution One person wrote most of the recent commits. ## Why - One person wrote 72% of human commits in the last year, so the project depends on them continuing. ([source 1](https://github.com/meta/zstd/commits), [source 2](https://github.com/meta/zstd/graphs/contributors)) - Maintainers took a median of 62 days to first respond to 24 recent issues. ([source 1](https://github.com/meta/zstd/commits), [source 2](https://github.com/meta/zstd/releases), [source 3](https://github.com/meta/zstd/pulls?q=is%3Apr+is%3Amerged), [source 4](https://github.com/meta/zstd/issues?q=is%3Aissue)) ### What would change this - A second person takes a substantial share of commits. - Maintainers reply faster, with a median under 30 days. - Partly checked: maintenance (Commit counts are estimated: the commit sample stops before the window start, so GitHub's totals were scaled by the sampled bot share.; Authors in the last 90 days are counted from the sampled commits only.) ## Maintenance Partial Active **Human commits, 30 days** 66 **Human commits, 90 days** 118 **Human commits, 365 days** 211 **Bot share of commits, 365 days** 3% **Last commit** Nov 12, 2026 (12 hours ago) **Last human commit** Nov 12, 2026 (12 hours ago) **Authors, 90 days** 14 **Last release** Feb 19, 2025 (1 year ago) **Median PR merge time** 15 hours Responsiveness: of 24 recent issues, 13% got a maintainer reply. Median first response: 62 days. - Commit counts are estimated: the commit sample stops before the window start, so GitHub's totals were scaled by the sampled bot share. - Authors in the last 90 days are counted from the sampled commits only. Sources: [Commits](https://github.com/meta/zstd/commits), [Releases](https://github.com/meta/zstd/releases), [Merged pull requests](https://github.com/meta/zstd/pulls?q=is%3Apr+is%3Amerged), [Issues](https://github.com/meta/zstd/issues?q=is%3Aissue) ## People Complete **Owner** Organization **Commits sampled** 97 since Nov 12, 2025 **Authors for half of commits** 1 **Authors for 80% of commits** 2 **Contributors** 365 ### Top committers - Cyan4973: 72% of commits - terrelln: 9% of commits - Usama Arif: 4% of commits - eyupcanakman: 2% of commits - kevinjzhang: 2% of commits - Shares come from the newest sampled commits, since the commit sample is capped. Sources: [Commits](https://github.com/meta/zstd/commits), [Contributors](https://github.com/meta/zstd/graphs/contributors) ## Stars Complete Organic, confidence high Bars show stars gained each week. Red bars overlap a burst. ### 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. - Star history from the full report of Oct 14, 2026; this update did not re-read it. Sources: [How star history is analyzed](https://reporadar.ai/methodology#stars) ## Risk Complete ### Flags No risk flags. ### License **Now** BSD-3-Clause (OSI-approved) **A year ago** BSD-3-Clause (OSI-approved) ### Packages No published packages found. Sources: [GitHub: meta/zstd](https://github.com/meta/zstd) ## Compare Weighing meta/zstd against an alternative? See both side by side. ## Badge ![RepoRadar: Caution](data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22112%22%20height%3D%2220%22%20role%3D%22img%22%20aria-label%3D%22reporadar%3A%20caution%22%3E%3Ctitle%3Ereporadar%3A%20caution%3C%2Ftitle%3E%3CclipPath%20id%3D%22r%22%3E%3Crect%20width%3D%22112%22%20height%3D%2220%22%20rx%3D%223%22%2F%3E%3C%2FclipPath%3E%3Cg%20clip-path%3D%22url(%23r)%22%3E%3Crect%20width%3D%2263%22%20height%3D%2220%22%20fill%3D%22%23555%22%2F%3E%3Crect%20x%3D%2263%22%20width%3D%2249%22%20height%3D%2220%22%20fill%3D%22%23dfa000%22%2F%3E%3C%2Fg%3E%3Cg%20fill%3D%22%23fff%22%20text-anchor%3D%22middle%22%20font-family%3D%22Verdana%2CGeneva%2CDejaVu%20Sans%2Csans-serif%22%20font-size%3D%2211%22%3E%3Ctext%20x%3D%2232%22%20y%3D%2214%22%3Ereporadar%3C%2Ftext%3E%3Ctext%20x%3D%2288%22%20y%3D%2214%22%3Ecaution%3C%2Ftext%3E%3C%2Fg%3E%3C%2Fsvg%3E) Add this to a README to show the current verdict: ``` [![RepoRadar](https://reporadar.ai/meta/zstd/badge.svg)](https://reporadar.ai/meta/zstd) ``` ## Follow Get told when this verdict changes. Add the feed to any feed reader: you get one entry per change, not one per refresh. ``` https://reporadar.ai/meta/zstd/feed.xml ``` [Open the feed](https://reporadar.ai/meta/zstd/feed.xml) ## More repos rated Caution [See all](https://reporadar.ai/-/reports/caution) - [fastai/fastai](https://reporadar.ai/fastai/fastai) 28.3k stars - [vernesong/OpenClash](https://reporadar.ai/vernesong/OpenClash) 28.2k stars - [AgriciDaniel/claude-seo](https://reporadar.ai/AgriciDaniel/claude-seo) 28.3k stars - [OtterMind/Chat2DB](https://reporadar.ai/OtterMind/Chat2DB) 28.4k stars - [geekcompany/ResumeSample](https://reporadar.ai/geekcompany/ResumeSample) 28.4k stars - [sdras/awesome-actions](https://reporadar.ai/sdras/awesome-actions) 28.4k stars ## Earlier verdicts - Nov 12, 2026: Caution - Nov 11, 2026: Caution - Nov 10, 2026: Caution - Nov 9, 2026: Caution - Nov 8, 2026: Caution - Nov 7, 2026: Caution - Nov 6, 2026: Caution - Nov 5, 2026: Caution - Nov 4, 2026: Caution - Nov 3, 2026: Caution Computed 12 hours ago · method 2026.10.2 Source: https://reporadar.ai/meta/zstd