head to head · open source
Inbox Zero vs DoubleZero
Inbox Zero has 12,895 GitHub stars, 1,653 forks, 209 open issues and last shipped yesterday. DoubleZero has 1,246 stars, 65 forks, 9 open issues and last shipped 2.0 years ago. Inbox Zero leads on adoption by 935% (12,895 vs 1,246 stars). Inbox Zero is written in TypeScript under a custom or non-standard licence; DoubleZero is written in Elixir under AGPL-3.0. Inbox Zero has attracted 13% as many forks as stars, DoubleZero 5%. 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 | DoubleZero | |
|---|---|---|
| GitHub stars | ★ 13K | ★ 1.2K |
| License | Custom / other | AGPL-3.0 |
| Written in | TypeScript | Elixir |
| Last push | 2026-11-02 | 2024-10-22 |
| Forks | ⑂ 1.7K | ⑂ 65 |
| 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 DoubleZero if
- You want the DoubleZero 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 DoubleZero 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 DoubleZero
00 is a self hostable SES dashboard for sending and monitoring emails with AWS. SES is an incredibly affordable way to build an email heavy application. However monitoring the emails is a bit of a nightmare, and often requires custom infrastructure. Even setting up the SES SNS SQS pipeline is a headache for developers unfamiliar with AWS. And when that is done your still left with hooking in or building custom some dashboard for viewing bounces and all the vital information you care about. 00 provides an SST configuration step to set up the SES SNS SQS pipeline, so you can just run a command and let SST do the…
read the full DoubleZero overview →
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Frequently asked questions
Is Inbox Zero or DoubleZero more popular?
Inbox Zero has 12,895 GitHub stars and DoubleZero has 1,246. Inbox Zero has the larger community by that measure.
Are Inbox Zero and DoubleZero free?
Both are open source. Inbox Zero has no licence declared in this registry, and DoubleZero is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Inbox Zero and DoubleZero?
Inbox Zero is written in TypeScript and DoubleZero 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 DoubleZero?
Choose Inbox Zero if you want the larger community (12,895 stars) or its Custom / other licence terms. Choose DoubleZero if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.