Unipile Alternatives

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues

Open Source

Your email with an assistant built in

The complete stand-up and follow-up bot

Try for free freemium $29.0 / Monthly (Flat price)

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.

BlueMail is an email management app for Android, iOS, and Windows.

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

Privacy-aware email app for Mac & iOS

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

EmailEngine is an email client but for apps, not people. It connects to the user's email server, translates REST API requests from the app to IMAP and SMTP commands, and sends webhooks for changes like new or deleted emails.

Open Source paid Free Trial €795.0 / Annually (Unlimited self hosted instances)

The Nylas Cloud API powers your application with email, calendar & contacts features. Built-in features for better email, calendar, and contact management.

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

Flexible, RESTful access to the user's inbox

Nylas Mail Lives is a fork of Nylas Mail.