head to head · open source
Inbox Zero vs Keila
Inbox Zero has 12,895 GitHub stars, 1,653 forks, 209 open issues and last shipped yesterday. Keila has 2,259 stars, 177 forks, 76 open issues and last shipped 3 days ago. Inbox Zero leads on adoption by 471% (12,895 vs 2,259 stars). Inbox Zero is written in TypeScript under a custom or non-standard licence; Keila is written in Elixir under AGPL-3.0. Inbox Zero has attracted 13% as many forks as stars, Keila 8%. 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 | Keila | |
|---|---|---|
| GitHub stars | ★ 13K | ★ 2.3K |
| License | Custom / other | AGPL-3.0 |
| Written in | TypeScript | Elixir |
| Last push | 2026-11-02 | 2026-10-31 |
| Forks | ⑂ 1.7K | ⑂ 177 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Inbox Zero if
- You weight community size — 13K 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 Keila if
- You want the Keila feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Elixir
- You evaluated both and Keila fits your workflow better
About Inbox Zero
Inbox Zero your 24/7 AI email assistant Organizes your inbox, pre drafts replies, manages your calendar, and organizes attachments. Chat with it from Slack or Telegram to manage your inbox on the go. Open source alternative to Fyxer, but more customizable and secure. Website · Discord · Issues Mission To help you spend less time in your inbox, so you can focus on what matters most. Features AI Personal Assistant: Organizes your inbox and pre drafts replies in your tone and style. AI Rules for email: Explain in plain English how your AI should handle your inbox. Reply Zero: Track emails to reply to and those…
read the full Inbox Zero overview →
About Keila
Keila An Open Source Newsletter Tool Keila is an Open Source alternative to newsletter tools like Mailchimp or Sendinblue. With Keila you can easily send out newsletter campaigns and create sign up forms. For smaller newsletters, you can use your own email inbox to send out campaigns. For larger newsletter projects, AWS SES, Sendgrid, Mailgun, and Postmark are supported in addition to SMTP. Give Keila a Try! You can give a hosted version of Keila a try on app.keila.io. More information about the pricing of Keila Cloud here. If you want to deploy Keila on your own server, you can use the official Docker image…
read the full Keila overview →
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Frequently asked questions
Is Inbox Zero or Keila more popular?
Inbox Zero has 12,895 GitHub stars and Keila has 2,259. Inbox Zero has the larger community by that measure.
Are Inbox Zero and Keila free?
Both are open source. Inbox Zero has no licence declared in this registry, and Keila is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Inbox Zero and Keila?
Inbox Zero is written in TypeScript and Keila in Elixir. 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 Keila?
Choose Inbox Zero if you want the larger community (12,895 stars) or its Custom / other licence terms. Choose Keila if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.