Yahoo Business Mail Alternatives

Web-based IMAP email client

Open Source

Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps

freemium

VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.

Try for free paid Free Trial $4.99 / Monthly (User)

Mailspring is a mail client for Mac, Windows and Linux.

Open Source

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

Native email app for email productivity.

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

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

The Power Email App for busy professionals, like you.

SmarterMail is a next generation email management server that is offering several business collaboration and communication features as well.

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

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

Mailplane is the best way to use Gmail on your Mac. Use an unlimited number of accounts, get new mail notifications, use plug-ins and much much more.

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