Knowmail Alternatives

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Mailbird is the best email client for Windows 7, 8 and 10

Warm up your cold email inbox, and never land in spam anymore!

Try for free freemium $9.0 / Monthly

Secure email with absolutely no compromises. Get your free encrypted email account today.

freemium €5.0 / Monthly (user - 5 GB)

The Power Email App for busy professionals, like you.

Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.

freemium $1.0 / Monthly (per user)

Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.

Open Source

Gaggle Mail is a simple and easy to use email list manager.

SaneBox is a cloud-based service that allows users to filter and manage their emails.

Airmail is a lightweight and lightning fast mail client for Mac.

multi-channel inbox service for collaborative teams

There’s big news attached.

eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.

freemium

Amazon WorkMail is a secure, managed business email and calendar service.