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Instead of Mailbutler Smart Assistant

Mailbutler Smart Assistant alternatives

Mailbutler Smart Assistant is built around composing and understanding email: it drafts from keywords, creates replies from details you supply, and lets you tune format, length, style, tone, and language. It can summarize selected messages, find tasks for Mailbutler Tasks, and suggest spelling and grammar changes. It works with Apple Mail, Gmail, and Outlook, and its AI assistant is part of the 14-day trial. Continued access requires a Smart or Business subscription, starting at $11 per user per month with yearly billing. It does not send messages automatically.

  1. 1

    Mozilla Thunderbird

    by Mozilla Thunderbird
    Free plan Open source AndroidLinuxMac+1

    Free, open-source email with offline and calendar tools — Thunderbird is a free, open-source email client with a unified inbox, offline access, scheduled sending, and calendar tools, rather than an AI email assistant.

    Free plan Visit site
  2. 2

    Zoho Mail

    by Zoho Mail
    Free plan AndroidAPIExtension+5

    Businesses needing custom-domain email hosting — Zoho Mail provides custom-domain business email hosting, while Mailbutler focuses on AI drafting, replies, summaries, and task discovery.

    Free plan · paid from $1/user/mo (annual) · 15-day trial Visit site
  3. 3

    Spark Mail

    by Spark Mail
    Free plan AndroidiPhoneMac+1

    Unified inbox with offline access and calendar tools — Spark Mail offers a unified inbox, offline access, scheduled sending, and calendar tools, while Mailbutler adds AI email drafting and summaries.

    Free plan · paid from $8.25/user/mo (annual) · 7-day trial Visit site
  4. 4

    eM Client

    by eM Client
    Free plan AndroidiPhoneMac+1

    Desktop and mobile email with two free accounts — eM Client combines a unified inbox, offline access, scheduled sending, and calendar tools, but its free account limit is two.

    Free plan · paid from $39.95/user/yr · 30-day trial Visit site
  5. 5

    Mailspring

    by Mailspring
    Free plan LinuxMacWindows

    Desktop email with a unified inbox and offline access — Mailspring offers desktop email with a unified inbox, offline access, and scheduled sending, while Mailbutler provides AI drafting and summaries.

    Free plan · paid from $8/mo Visit site
  6. 6

    Newton Mail

    by Newton Mail
    Free plan AndroidiPhoneMac+1

    Unified inbox, offline access, and calendar tools — Newton Mail offers a unified inbox, offline access, scheduled sending, and calendar tools, with a two-account limit.

    Free plan · paid from $5/user/mo (annual) · 14-day trial Visit site
  7. 7

    BlueMail

    by BlueMail
    Free plan AndroidiPhoneLinux+2

    Bringing multiple providers into one inbox — BlueMail brings email accounts from different providers into a unified inbox, while Mailbutler centers on AI assistance for three email clients.

    Free plan · 7-day trial Visit site
  8. 8

    Metis Mail

    by Metis Mail
    Free plan Open source APISelf-hostedWeb
    8.7 Free plan · paid from $12/user/mo Visit site
  9. 9

    Fyxer

    Free plan APIiPhoneMac+2
    7.6 From $22.50/user/mo (annual) · 7-day trial Visit site
  10. 10

    EmailOps

    Free plan LinuxMacWindows
    7.4 Free plan Visit site
  11. 11

    Kerna

    Free plan MacWebWindows
    7.3 Free plan · paid from €12/mo Visit site
  12. 12

    MailCopilot

    Free plan LinuxMacWindows
    7.3 Free plan Visit site
  13. 13

    Demi

    Free plan Mac
    7.2 Free plan · paid from $25/mo · 7-day trial Visit site
  14. 14

    DispatchMail

    Free plan APISelf-hostedWeb
    7.2 Open source Visit site
  15. 15

    Ellie

    Free plan ExtensionWebWindows
    7.2 Free plan · 7-day trial Visit site
  16. 16

    EmailAgent

    Free plan Web
    7.2 Free plan Visit site
  17. 17

    MailFlow

    Free plan APISelf-hostedWeb
    7.2 Free plan · paid from $12/mo Visit site
  18. 18

    OpenMailBot

    Free plan LinuxMacSelf-hosted+2
    7.2 Free plan Visit site
  19. 19

    Perplexity

    Free plan AndroidAPIiPhone+3
    7.2 Free plan Visit site
  20. 20

    Maillifier

    Free plan Self-hostedWeb
    7.1 Free plan Visit site
  21. 21

    MailMaestro

    Free plan ExtensionWeb
    7.1 Free plan · paid from $12/user/mo (annual) · 14-day trial Visit site
  22. 22

    Serif

    Free plan iPhoneMacWeb+1
    7.1 From $30/mo · 7-day trial Visit site
  23. 23

    Shortwave

    Free plan AndroidiPhoneMac+2
    7.0 Free plan · paid from $30/user/mo · 14-day trial Visit site
  24. 24

    Spark +AI

    Free plan AndroidiPhoneMac+1
    7.0 Free plan · paid from $10/user/mo · 7-day trial Visit site
  25. 25

    Spike

    Free plan AndroidiPhoneMac+2
    7.0 Free plan · paid from $4/user/mo (annual) Visit site
  26. 26

    Superhuman Go

    Free plan AndroidExtensioniPhone+3
    7.0 Free plan · paid from $12/mo (annual) Visit site
  27. 27

    MailWise

    Free plan Web
    6.9 Free plan · paid from £15/mo Visit site
  28. 28

    Drag

    Free trial AndroidAPIExtension+4
    6.5 From $12/user/mo (annual) · 7-day trial Visit site
  29. 29

    thread.

    Free plan Extension
    6.5 Free plan Visit site
  30. 30

    Inbox Zero

    Free trial AndroidAPIExtension+3
    6.4 7-day trial Visit site
  31. 31

    Kai

    Free trial AndroidiPhoneMac+1
    6.4 From $50/user/mo Visit site

An alternative may suit you better if your priority is a free email client, a unified inbox, offline access, scheduled sending, calendar tools, or custom-domain hosting. Mailbutler covers desktop and mobile platforms, but the assistant is tied to three email clients and costs more than some listed entry plans. Decide whether AI drafting, summaries, and task discovery outweigh account management or hosting needs. Compare platform support, account limits, trial availability, and paid-plan terms before switching.

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