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Alternatives · 2026

The best Inbox Zero alternatives

The rest of Best AI Email Assistants, in this site's order.

1
Mailbutler Smart Assistant

Smart Assistant suits Apple Mail, Outlook, or Gmail users who want help drafting and revising messages, summarizing emails, or identifying to-dos.

AndroidiPhone & iPadWeb+4 Free plan Record6.6 Visit
2
Shortwave

Shortwave suits people who want AI tools alongside business email, including teams that share threads, comments, assignments, and labels.

AndroidiPhone & iPadWeb+2 $30 a month Record6.1 Visit
3
Superhuman Go

It may suit people who want writing help and AI assistance across apps and websites.

AndroidiPhone & iPadWeb+3 $12 a month, billed yearly Record6.1 Visit
4
Fyxer

Fyxer is aimed at salespeople, recruiters, real estate agents, and other external-facing roles with heavy inbox workloads.

iPhone & iPadWebWindows+2 Free plan Record6.0 Visit
5
Perplexity

Perplexity may suit people who want sourced answers across web search, files, and connected apps.

AndroidiPhone & iPadWeb+3 $20 a month Record6.0 Visit
6
Serif

Serif is intended for small businesses and operations teams that want to automate routine email and document work.

iPhone & iPadWebWindows+1 $30 a month Record6.0 Visit
7
Spark +AI

Spark +AI may suit individuals and teams who want email search and writing assistance across supported email accounts.

AndroidiPhone & iPadWindows+1 $10 a month, billed yearly Record6.0 Visit
8
Spike

Spike suits people who want to organize existing email accounts and manage multiple inboxes, as well as teams that need shared workspaces and…

AndroidiPhone & iPadWeb+2 $4 a month, billed yearly Record6.0 Visit
9
Drag

Drag suits teams working in Gmail or Google Workspace that need to share customer email across support, sales, operations, IT or HR.

AndroidiPhone & iPadWeb+4 $12 a month, billed yearly Record5.8 Visit
10 WebAPISelf-hosted $115 a year Record5.5 Visit
11
Kerna

Kerna suits professionals who want help organizing and drafting email, with team plans available for collaboration and larger organizations.

WebWindowsMac €12 a month Record5.4 Visit
12
MailMaestro

MailMaestro may suit professionals who want help writing, revising, and summarizing email, or coordinating meeting replies.

WebBrowser extension $144 a year Record5.4 Visit
13 AndroidiPhone & iPadWeb+1 $20 a month Record5.2 Visit
14 AndroidWebWindows+2 $15 a month, billed yearly Record5.2 Visit
15 Web £15 a month Record5.1 Visit
16 WindowsMacLinux Free plan Record5.0 Visit
17 WebWindowsMac+2 Free plan Record4.9 Visit
18 WindowsMacLinux Free plan Record4.8 Visit
19
Missive

Missive may suit people or teams who want a unified inbox across desktop and mobile platforms, with offline access, scheduled sending, and calendar…

AndroidiPhone & iPadWeb+2 $14 a month, billed yearly Record4.8 Visit
20 AndroidWebBrowser extension A$14.95 a month Record4.8 Visit
21 WebBrowser extension $9 a month Record4.8 Visit
22 WebWindowsBrowser extension Free plan Record4.7 Visit
23 Web Free plan Record4.7 Visit
24 WebSelf-hosted $32 a month, billed yearly Record4.7 Visit