Alternatives to Quell

18.2

Mailbutler Smart Assistant

Mailbutler Smart Assistant adds AI writing and email-management tools to Apple Mail, Microsoft Outlook, and Gmail.

Free planAndroidiOSWeb

From $7 a month

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28.2

Perplexity

Perplexity is an answer engine that searches the open web in real time and returns concise responses with inline citations.

Free planAndroidiOSWeb

Free plan

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38.1

Fyxer

Fyxer is an AI assistant for email and meetings that organizes inboxes, highlights messages needing replies, and helps manage follow-ups.

Free planiOSWebAPI

From $22.50 a month

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4. 4

   Serif

   Serif places an AI employee in shared email addresses such as info@, support@, and billing@ to handle routine messages.

   Free planiOSWebmacOSWindows
   8.0From $30 a month
   Visit
5. 5

   Drag

   Drag is a shared inbox for teams that handle customer email in Gmail or the Drag web app.

   AndroidiOSWebAPI
   7.8From $12 a month
   Visit
6. 6

   Spike

   Spike is an email and collaboration app with a unified inbox, scheduled sending, and calendar tools.

   Free planAndroidiOSWebmacOS
   7.8From $4 a month
   Visit
7. 7

   Superhuman Go

   Superhuman Go is an AI assistant and agent platform that offers proactive help across apps and websites.

   Free planAndroidiOSWebExtension
   7.5From $12 a month
   Visit
8. 8

   Shortwave

   Shortwave is an AI email app for organizing, composing, scheduling and finding messages through prompts.

   AndroidiOSWebmacOS
   7.3From $30 a month
   Visit
9. 9

   Spark +AI

   Spark +AI adds an AI assistant to Spark’s email app for Android, iOS, macOS, and Windows.

   Free planAndroidiOSmacOSWindows
   7.2From $10 a month
   Visit
10. 10KE

    Kerna

    Kerna is an AI email assistant that works inside Gmail and Outlook, with a free plan and paid plans from €12/mo.

    Free planWebmacOSWindows
    7.1From €12 a month
    Visit
11. 11MM

    Metis Mail

    Free planWebSelf-hosted
    7.0From $9.58 a month
    Visit
12. 12

    Kai

    AndroidiOSWebmacOS
    6.9From $20 a month
    Visit
13. 13

    MorningZero

    MorningZero combines Gmail, Outlook, and IMAP accounts in one inbox and uses AI to sort messages, explaining the labels it assigns.

    AndroidWebLinuxmacOS
    6.9From $15 a month
    Visit
14. 14IZ

    Inbox Zero

    AndroidiOSWebAPI
    6.8From $20 a month
    Visit
15. 15

    MailMaestro

    MailMaestro is an AI email assistant for professionals who want to spend less time handling messages and improve writing and inbox organization.

    Free planWebExtension
    6.8From $12 a month
    Visit
16. 16MA

    MailWise

    MailWise is a web-based AI email management service for Gmail.

    Free planWeb
    6.7From £15 a month
    Visit
17. 17

    Missive

    Missive is a paid email and collaboration app available on the web, Windows, macOS, iOS, and Android.

    AndroidiOSWebWindows
    6.7From $14 a month
    Visit
18. 18

    Demi

    Demi is an AI teammate for preparing work across email, meetings, Slack, and CRM tools.

    Free planmacOS
    6.5From $25 a month
    Visit
19. 19MA

    MailFlow

    MailFlow sorts incoming email into IMAP folders and prepares reply drafts in the user’s writing style.

    Free planWebAPISelf-hosted
    6.5From $12 a month
    Visit
20. 20

    OpenMailBot

    Free planWebLinuxmacOSSelf-hosted
    6.5Free plan
    Visit
21. 21

    InReply

    Web
    6.4From £39 a month
    Visit
22. 22

    MailCopilot

    MailCopilot is a desktop email client for Linux, macOS, and Windows, with a unified inbox, offline access, scheduled sending, and calendar tools.

    Free planLinuxmacOSWindows
    6.4Free plan
    Visit
23. 23

    Remail

    Remail is an AI assistant for email plus tools for chat, reading, writing, image generation, and comparing model responses.

    WebExtension
    6.4From $0.54 a month
    Visit
24. 24

    Superhuman Mail

    AndroidiOSWebWindows
    6.4From $2.08 a month
    Visit
25. 25EM

    EmailOps

    EmailOps is a free, open-source email client for Linux, macOS, and Windows that runs AI on the user's computer.

    Free planLinuxmacOSWindows
    6.3Free plan
    Visit
26. 26

    EmailAgent

    EmailAgent is a web-based assistant for inbox triage, reply drafting, approved sending, and scheduled vendor follow-ups.

    Free planWeb
    6.2Free plan
    Visit
27. 27

    InboxPilot

    WebSelf-hosted
    6.2From $32 a month
    Visit
28. 28

    Pontius

    LinuxmacOSWindows
    6.2$99, paid once
    Visit
29. 29QU

    QuietGrowth

    Web
    6.2From $150 a month
    Visit
30. 30SY

    Syncro

    Web
    6.2From $8 a month
    Visit

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