mermaid-js/mermaid

Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown

90.7k stars · 9.3k forks · TypeScript

Healthy

Healthy: actively maintained by 19 people, no known risks.

Why

No rule fired.

What would change this

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.)
A dormant maintenance status, a deprecated or archived package, a successor link, or a critical advisory would change this.

Maintenance

Partial

Active

Human commits, 30 days: 179
Human commits, 90 days: 716
Human commits, 365 days: 2.4k
Bot share of commits, 365 days: 5%
Last commit: Oct 14, 2026 (22 hours ago)
Last human commit: Oct 14, 2026 (22 hours ago)
Authors, 90 days: 19
Last release: Oct 13, 2026 (1 day ago)
Median PR merge time: 17 hours

Responsiveness: of 17 recent issues, 24% got a maintainer reply. Median first response: 2 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, Releases, Merged pull requests, Issues

People

Complete

Owner: Organization
Commits sampled: 475 since Oct 14, 2025
Authors for half of commits: 2
Authors for 80% of commits: 3
Contributors: 365

Top committers

ashishjain0512: 33% of commits
pbrolin47: 26% of commits
knsv: 25% of commits
aloisklink: 3% of commits
filipsajdak: 3% of commits

Shares come from the newest sampled commits, since the commit sample is capped.

Sources: Commits, Contributors

Stars

Complete

Organic, confidence high

Bars show stars gained each week. Orange bars overlap a burst.

Bursts

Dec 6, 2014 to Dec 24, 2014: about 1.6k more stars than usual, peak 310 in one day, a spike that tapers off. We couldn't check for an outside explanation.
Mar 8, 2015 to Mar 11, 2015: about 75 more stars than usual, peak 29 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Jan 5, 2017 to Jan 20, 2017: about 2.3k more stars than usual, peak 925 in one day, a spike that tapers off. Outside explanation: a jump in forks.
Oct 31, 2017 to Nov 1, 2017: about 63 more stars than usual, peak 55 in one day, a spike that tapers off. Outside explanation: a jump in forks.
Apr 20, 2018 to May 4, 2018: about 1.7k more stars than usual, peak 590 in one day, a spike that tapers off. No outside explanation found, so this burst is unexplained.
Jun 1, 2018 to Jun 2, 2018: about 83 more stars than usual, peak 73 in one day, a spike that tapers off. Outside explanation: a jump in forks.
Jul 19, 2018 to Jul 24, 2018: about 176 more stars than usual, peak 55 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Nov 28, 2018 to Dec 1, 2018: about 471 more stars than usual, peak 211 in one day, a spike that tapers off. Outside explanation: a jump in forks.
Jun 15, 2020 to Jun 16, 2020: about 52 more stars than usual, peak 54 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Jan 13, 2022 to Jan 21, 2022: about 417 more stars than usual, peak 178 in one day, a spike that tapers off. Outside explanation: a jump in forks, a jump in issues and pull requests.
Feb 14, 2022 to Feb 25, 2022: about 3.4k more stars than usual, peak 793 in one day, a spike that tapers off. Outside explanation: a Hacker News post, a jump in forks.
May 5, 2022 to May 6, 2022: about 91 more stars than usual, peak 103 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Dec 17, 2022 to Dec 17, 2022: about 80 more stars than usual, peak 103 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Feb 17, 2023 to Feb 24, 2023: about 412 more stars than usual, peak 132 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Jul 18, 2024 to Jul 19, 2024: about 211 more stars than usual, peak 195 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
Feb 6, 2025 to Feb 7, 2025: about 150 more stars than usual, peak 156 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.
May 23, 2025 to May 24, 2025: about 118 more stars than usual, peak 92 in one day, a spike that tapers off. Outside explanation: a Hacker News post, a jump in issues and pull requests.
Jul 21, 2025 to Jul 21, 2025: about 58 more stars than usual, peak 85 in one day, a spike that tapers off. Outside explanation: a jump in issues and pull requests.

8 stars GitHub has since removed (tracked since Oct 13, 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

Complete

Flags

No risk flags.

License

Now: MIT (OSI-approved)
A year ago: MIT (OSI-approved)

Packages

No published packages found.

OpenSSF Scorecard: 6.5 out of 10 (via deps.dev).

Sources: GitHub: mermaid-js/mermaid

Badge

Add this to a README to show the current verdict:

[![RepoRadar](https://reporadar.ai/mermaid-js/mermaid/badge.svg)](https://reporadar.ai/mermaid-js/mermaid)

Earlier verdicts

Oct 14, 2026: Healthy
Oct 13, 2026: Healthy
Oct 13, 2026: Healthy

Computed 19 hours ago · method 2026.10.2