Open-source email for growing teams. Deploy on your own infrastructure, connect your domain, and manage your organization’s email without a software subscription for every employee.
India
Thunderbird Alternatives
One of the most popular alternatives to Thunderbird is Betterbird, which is free and open source. Other popular alternatives are K-9 Mail, Evolution, Microsoft Outlook and SeaMonkey. There's no shortage of Email Clients like Thunderbird, with more than 100 alternatives for Windows, Mac, Linux, Android and iPhone.
filter to find the best alternatives
Most Thunderbird alternatives are Email Clients, but you can also narrow the list to Calendar Apps or Contact Managers. Other popular filters are iPhone, Linux, Open Source, Android and Windows. You can also filter for EU-based alternatives if you prefer software from the European Union.
Alternatives list
- 5 Unfoldmail alternatives
An independent IncrediMail alternative for Windows, with animated animal notifiers, illustrated stationery and a combined inbox.
TabMail is available as a standalone iPhone email client and an AI assistant add-on for Thunderbird. It works with existing Gmail, Outlook, iCloud and IMAP inboxes, offering suggested replies, conversational editing, email triage and chat with your inbox.
Canada
+4
A privacy-first, offline-first email client that puts you back in control. No ads, no tracking, no compromises.
United States
This is an open-source, clean-room mail, calendar and contacts program in pure Rust, for Microsoft 365, Outlook.com and IMAP. Early alpha.
United Kingdom
+1
ByteMail is a native email app for Mac, built with SwiftUI and AppKit. It puts Gmail, iCloud, Outlook, Microsoft 365, Yahoo and any IMAP account in one fast, tidy inbox. Your mail goes straight from your provider to your Mac.
+2
Lightweight Windows taskbar app that shows unread email counts from all your Gmail and Microsoft 365 accounts, no browser or Outlook required.
Cost / License
- Freemium
- Proprietary
Since
- Since 2026
Australia
Convey is an email application built around conversations, for the GNOME desktop. It allows you to read, find and send email with a straight-forward, modern interface.
- United Kingdom
Sort, reply, and organize your inbox using a smart knowledge base for accurate, personalized answers. Save time and boost productivity with secure, automated email management.
France
EU
64 QQ Mail alternativesFull support for general mail protocols to help you manage all your mailboxes on your phone.
China
MyEzInbox is an AI-enabled edit-anything email client for Windows. Supports encryption. Free for personal use.
51 Dove alternativesAI email client that sorts your mail into Needs You, FYI, and Noise, builds your day in a Today view, and drafts replies in your voice.
Singapore
