Best Inbox Zero Alternatives in 2026
Updated
20 tools from AI email assistants ranked against Inbox Zero on the same published basis.
- 1Inbox Zero vs Mailbutler Smart Assistant
- 2Inbox Zero vs Perplexity
- 3Inbox Zero vs Spark +AI
- 4Inbox Zero vs Superhuman Go
- 5Inbox Zero vs Spike
- 6Inbox Zero vs Shortwave
- 7Inbox Zero vs Drag
- 8Inbox Zero vs MailMaestro
- 9Inbox Zero vs Mailtwine
- 10Inbox Zero vs MorningZero
- 11Inbox Zero vs Kerna
- 12Inbox Zero vs EmailOps
- 13Inbox Zero vs Kai
- 15Inbox Zero vs Missive
- 16Inbox Zero vs Maylee
- 17Inbox Zero vs Superhuman Mail
- 18Inbox Zero vs Needle
- 19Inbox Zero vs Metis Mail
- 20Inbox Zero vs Replai
- 21Inbox Zero vs Serif
Inbox Zero alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Mailbutler Smart Assistant | 8.1 | Free plan | $7/mo | Android, Browser, iOS, Linux, Mac, Web, Windows |
| 2 | Perplexity | 7.8 | Free plan | $20/mo | Android, API, iOS, Mac, Web, Windows |
| 3 | Spark +AI | 7.6 | Free plan | $10/mo | Android, iOS, Mac, Windows |
| 4 | Superhuman Go | 7.6 | Free plan | $12/mo | Android, Browser, iOS, Mac, Web, Windows |
| 5 | Spike | 7.4 | Free plan | $4/mo | Android, iOS, Mac, Web, Windows |
| 6 | Shortwave | 7.3 | No | $30/mo | Android, iOS, Mac, Web, Windows |
| 7 | Drag | 7.1 | No | $12/mo | Android, API, Browser, iOS, Mac, Web, Windows |
| 8 | MailMaestro | 7.1 | Free plan | $12/mo | Browser, Web |
| 9 | Mailtwine | 7.1 | No | — | Android, iOS, Linux, Mac, Web, Windows |
| 10 | MorningZero | 7.1 | No | $15/mo | Android, Linux, Mac, Web, Windows |
| 11 | Kerna | 7.0 | Free plan | €12/mo | Mac, Web, Windows |
| 12 | EmailOps | 6.9 | Free plan | Free | Linux, Mac, Windows |
| 13 | Kai | 6.9 | No | $20/mo | Android, iOS, Mac, Web |
| 15 | Missive | 6.7 | No | $14/mo | Web, Windows, Mac, iOS, Android |
| 16 | Maylee | 6.6 | No | $17/mo | Android, iOS, Mac, Web, Windows |
| 17 | Superhuman Mail | 6.6 | No | $2.08/mo | Web, Windows, Mac, iOS, Android |
| 18 | Needle | 6.5 | Free plan | Free | Web |
| 19 | Metis Mail | 6.4 | Free plan | $12/mo | Web |
| 20 | Replai | 6.4 | Free plan | $6/mo | Web |
| 21 | Serif | 6.3 | No | $30/mo | Web, Windows, Mac, iOS |
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Questions about Inbox Zero alternatives
What is the best alternative to Inbox Zero?
Mailbutler Smart Assistant, number 1 in AI email assistants with a score of 8.1 out of 10. The others here: Perplexity, Spark +AI, Superhuman Go and 16 more.
What is the best free alternative to Inbox Zero?
Mailbutler Smart Assistant is the best-ranked alternative with a free plan. 11 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.