head to head · open source
Inbox Zero vs Sendportal
Inbox Zero has 12,238 GitHub stars, 1,536 forks, 209 open issues and last shipped yesterday. Sendportal has 2,173 stars, 465 forks, 52 open issues and last shipped 2.4 years ago. Inbox Zero leads on adoption by 463% (12,238 vs 2,173 stars). Inbox Zero is written in TypeScript under a custom or non-standard licence; Sendportal is written in PHP under MIT. Inbox Zero has attracted 13% as many forks as stars, Sendportal 21%. Inbox Zero was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Inbox Zero | Sendportal | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 2.2K |
| License | Custom / other | MIT |
| Written in | TypeScript | PHP |
| Last push | 2026-09-17 | 2024-04-19 |
| Forks | ⑂ 1.5K | ⑂ 465 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Inbox Zero if
- You weight community size — 12K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick Sendportal if
- You want the Sendportal feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches PHP
- You evaluated both and Sendportal fits your workflow better
About Inbox Zero
Inbox Zero is an open source AI email assistant written in TypeScript and placed in the email productivity ecosystem. It is a web application built with Next.js, shadcn/ui, Prisma, and related tools. The project describes itself as a 24/7 assistant that organizes email, drafts replies, manages calendar context, and handles attachments.
read the full Inbox Zero overview →
About Sendportal
SendPortal is an open source, self hosted email marketing application built in PHP and Laravel. It lives in the PHP and Laravel ecosystem and is distributed under the MIT license. Its core functionality is packaged as SendPortal Core, while the SendPortal application wraps that core with user authentication and multiple workspaces.
read the full Sendportal overview →
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Frequently asked questions
Is Inbox Zero or Sendportal more popular?
Inbox Zero has 12,238 GitHub stars and Sendportal has 2,173. Inbox Zero has the larger community by that measure.
Are Inbox Zero and Sendportal free?
Both are open source. Inbox Zero has no licence declared in this registry, and Sendportal is licensed under MIT. Both are free to self-host.
What is the difference between Inbox Zero and Sendportal?
Inbox Zero is written in TypeScript and Sendportal in PHP. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Inbox Zero or Sendportal?
Choose Inbox Zero if you want the larger community (12,238 stars) or its Custom / other licence terms. Choose Sendportal if its feature set, stack or MIT licence fits better. Both are self-hostable.