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Alternatives · 2026

The best Mozilla Thunderbird alternatives

{"intro": "Mozilla Thunderbird brings email, calendars, contacts, and tasks together in a free, open-source package.

1
Zoho Mail

Zoho Mail suits businesses that need email on a custom domain and administration controls.

AndroidiPhone & iPadWeb+5 Free plan Record9.2 Visit
2
Spark Mail

Spark Mail may suit people managing multiple email accounts who want priority sorting, calendar tools, and offline access.

AndroidiPhone & iPadWindows+1 $99 a year Record8.7 Visit
3
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 Record8.7 Visit
4
eM Client

eM Client suits people who want email and productivity tools together across desktop and mobile platforms.

AndroidiPhone & iPadWindows+1 $39.95 a year Record8.3 Visit
5
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 Record8.2 Visit
6 WindowsMacLinux Free plan Record8.0 Visit
7
Canary Mail

Canary Mail suits individuals who want a unified inbox across supported desktop and mobile platforms.

AndroidiPhone & iPadWindows+1 $3 a month, billed yearly Record8.0 Visit
8 AndroidiPhone & iPadWeb+3 $25 a month, billed yearly Record7.9 Visit
9
BlueMail

BlueMail suits people managing multiple email providers who want a unified inbox, offline access, calendar tools, and message organization.

AndroidiPhone & iPadWindows+2 Free plan Record7.9 Visit
10
Epistles Mail

It may suit people who want to manage supported email accounts in one inbox across desktop, mobile, web, or a watch.

AndroidiPhone & iPadWeb+3 $35 a year Record7.9 Visit
11
Newton Mail

Newton Mail suits people who want a unified inbox across supported email providers and desktop or mobile platforms.

AndroidiPhone & iPadWindows+1 $5 a month Record7.8 Visit
12
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 Record7.8 Visit
13 AndroidiPhone & iPadWeb+2 $200 a year Record7.8 Visit
14 AndroidiPhone & iPadWindows+1 $99.99 a year Record7.7 Visit
15 AndroidiPhone & iPadWeb+5 $500 a year Record7.7 Visit
16 AndroidiPhone & iPadWindows+2 Free plan Record7.5 Visit
17
Apple Mail

Apple Mail suits people who want to manage accounts from several email providers in one app.

iPhone & iPadMac Free plan Record7.3 Visit
18
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 Record7.3 Visit
19
Workspace ONE Boxer

Boxer suits mobile users who want a unified inbox and calendar within an endpoint management offering.

AndroidiPhone & iPadWeb+3 $5.40 a month Record7.3 Visit
20 WebLinuxSelf-hosted Free plan Record7.2 Visit
21 iPhone & iPadMac $29.99 a year Record7.2 Visit
22 WindowsMacLinux $60 a year Record7.2 Visit
23
Gmelius

Gmelius suits teams that coordinate work in Gmail and want to assign defined jobs to AI agents.

AndroidiPhone & iPadWeb+2 $228 a year Record7.1 Visit
24 Linux Free plan Record7.0 Visit