# Fastmail — developer ecosystem report

> Open-source software developed at Fastmail.

- GitHub org: `fastmail`
- Category: saas
- Overall score: 41.0 / 100
- Overall rank: #440
- Last refreshed: 2026-08-21

## Pillar scores

| Pillar | Score / 100 | Rank | Weight in overall |
| --- | --- | --- | --- |
| Code & Polish | 35.0 | #874 | ~22% |
| Education | 66.0 | #445 | ~18% |
| AI readiness | 6.0 | #1004 | part of Reach |
| Builder experience | 0.0 | #1 | ~12% |
| Community | 34.0 | #458 | ~16% |
| Reach | 80.0 | #31 | ~18% |
| Momentum | 42.0 | #317 | ~14% |

## Links

- GitHub: https://github.com/fastmail
- Website: https://www.fastmail.com

## Public GitHub totals

| Metric | Value |
| --- | --- |
| Repos analyzed | 12 |
| Stars | 6,331 |
| Forks | 575 |
| Open issues | 168 |
| Contributors | — |

## Top repositories

| Repo | Stars | Language | Description |
| --- | --- | --- | --- |
| [Squire](https://github.com/fastmail/Squire) | 4,905 | TypeScript | The rich text editor for arbitrary HTML. |
| [overture](https://github.com/fastmail/overture) | 766 | JavaScript | Overture is a powerful JS library for building really slick web applications, with performance at, or surpassing, native |
| [towncrier](https://github.com/fastmail/towncrier) | 222 | Perl | A status dashboard |
| [authentication_milter](https://github.com/fastmail/authentication_milter) | 145 | Perl | Email Authentication by SPF/DKIM/DMARC etc. |
| [JMAP-Samples](https://github.com/fastmail/JMAP-Samples) | 124 | Python | sample code for beginning JMAP developers |
| [Moonpig](https://github.com/fastmail/Moonpig) | 73 | Perl | the moonpig billing system |
| [hopscotch](https://github.com/fastmail/hopscotch) | 16 | Perl | A tiny, high-performance HTTP image proxy |
| [Synergy](https://github.com/fastmail/Synergy) | 14 | Perl | a little annoying bot that annoys me a little |
| [Ix](https://github.com/fastmail/Ix) | 11 | Perl | automatic generation of JMAP-style APIs |
| [Stick](https://github.com/fastmail/Stick) | 10 | Perl | — |
| [JMAP-TestSuite](https://github.com/fastmail/JMAP-TestSuite) | 9 | Perl | a JMAP test suite |
| [mail-dkim](https://github.com/fastmail/mail-dkim) | 8 | Perl | Mail::DKIM Perl module, forked from svn://svn.code.sf.net/p/dkimproxy/code/Mail-DKIM/trunk |

## Methodology

Scores are computed from public signals only (GitHub, package registries, docs sites, community platforms). Pillar definitions: https://www.smoower.com/docs.md

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