Apps similar to Supamail include Thunderbird, which is free and open source. Other options are K-9 Mail, Microsoft Outlook, FairEmail and Spark Mail. Email Clients like Supamail are a crowded field, with more than 25 alternatives for Mac, Windows, Android, iPhone and iPad.
Transform your email inbox into a collaborative workspace with Spike. Enjoy integrated chat-like emails, tasks, collaborative notes, and group projects. Seamlessly manage multiple accounts, organize priorities, and schedule meetings across devices.
Israel
Engineered for iOS, macOS, and watchOS, this fast mail client supports multiple account types, custom actions, Smart Inbox filtering, unified inbox, privacy mode, email scheduling, snooze, third-party app integration, flexible personalization, and advanced workflow tools.
Italy
EU
TypeApp is an all-free, beautifully designed, universal email app, capable of managing unlimited number of mail accounts from various providers, allowing for smart push notifications while enabling personalization across multiple email accounts.
United States
No-frills, easy to use, easy to maintain Email client for Android based on the JSON Meta Application Protocol (JMAP).
GermanyEU
Email by Edison (formerly Email by EasilyDo) is a brand new, elegantly designed, universal mail app to manage unlimited mail accounts.
United States
Mimestream combines your favorite Gmail features with the power of a native macOS app so you can move through your email effortlessly.
United States
The Bat! is a secure email client software, built to protect your correspondence against third-parties.
Moldova
Mac IMAP email client featuring keyboard control, Markdown email composition, advanced search capabilities, smart mailboxes, automatic signature handling, cryptographic options with OpenPGP/S-MIME, tagging, multiple notifications, and customizable layouts including widescreen.
Productivity-centered email application streamlines inbox management, uses AI for drafting responses, automates snippets, summarizes conversations, enables timely sends, integrates calendar and CRM, and includes collaborative features like live views and comments.
United States
myMail is the smart email app for managing all your accounts on iOS and Android.
Russia
United States
Collaborative email and threaded group chat for productive teams. A single app for all your internal and external communication.
Canada
