Apps similar to Mailbox for Zoho include Thunderbird, which is free and open source. Other options are K-9 Mail, SeaMonkey, Microsoft Outlook and FairEmail. There's no shortage of Email Clients like Mailbox for Zoho, with more than 50 alternatives for Windows, Mac, Linux, Android and iPhone.
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
The free Zimbra Desktop client allows you to meld the online and offline worlds – storing and synching your email, calendar, contacts, files and documents in the cloud, yet having them locally accessible when on the road.
United States
KMail is the email component of Kontact, the integrated personal information manager of KDE. Kontact is a personal information manager and groupware software suite for KDE. It supports calendars, contacts, notes, to-do lists, news, and email.
GermanyEU
No-frills, easy to use, easy to maintain Email client for Android based on the JSON Meta Application Protocol (JMAP).
GermanyEU
The Bat! is a secure email client software, built to protect your correspondence against third-parties.
Moldova
Mail is designed to let you manage your email quickly and effortlessly. Its interface is based on conversations, so you can read an entire discussion without having to click from message to message.
United States
Hamsket is a fork of Rambox that was started when Rambox moved from being totally free to a "freemium" model.
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.
Front is an email management software that facilitates team collaboration by integrating with existing tools. It assigns messages to team members, allows internal comments, sets reminders for responses, offers templates for common questions, and has a collision detection feature...
United States
Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and as little as 20 MB of RAM.
SpainEU
Scribe is a small portable email client with an intergrated contact database and calendar. It supports all the major internet mail protocols and uses international standards where possible. Scribe doesn't required installing or uninstalled and can be used from a removable...
