Apps with 'Unified inbox' feature

Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.

Secure Swiss-based email with end-to-end encryption and zero third-party access. Available across devices, offering a free version to promote privacy.

Experience robust security, multiple accounts, chat, and fast search with efficient Gmail email management in a streamlined interface.

K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable notifications and more.

Open-source client enhancing Thunderbird with more features and bug fixes. Offers security patches and multi-row descriptions like Outlook.

Unifies chats from 14 messaging networks in a single inbox, ensures privacy with on-device connections, and offers reminders, scheduling, and sync across devices.

Privacy-focused, open-source email app offering encryption, unlimited accounts, customizable features, unified inbox, and low data usage.

Manage emails, calendars, contacts, and tasks with an intuitive interface. Features smart inbox, file management, and third-party app integration.

Uses email as a decentralized chat platform with modern interface, open source code, no central servers, strong privacy controls, and no account signup.

An intelligent inbox that simplifies email management with AI scheduling, snippets, and automated email organization in a familiar and clean design.

eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts, notes and chat.

E-mail app with all the great features: swipes (long/short), snooze, add (multiple) attachments from the cloud, support for various e-mail services and more.

Boost your productivity and send better email with Mailspring, a beautiful, fast email client for Mac, Windows, and Linux. Mailspring is free to use and an optional pro version adds read receipts, send later, reminders and more.

Zenkit is a flexible, collaborative SaaS platform for project management and database building. Organize, track data and share tasks with team or build custom systems like a CRM or financial planner.

ERPNext is a free and open-source integrated Enterprise Resource Planning (ERP) software developed by Frappé Technologies Pvt. Ltd. and is built on MariaDB database system using a Python based server-side framework.

UpNote is an elegant and powerful note app that works seamlessly across platforms: iOS, Android, Mac and Windows.

Manage emails, integrate apps, and personalize your workspace with AI-powered drafting, centralized management, and customizable features for efficient workflows.

Anbox puts Android into a container and every Android application will be integrated with your operating system. Any Android version is suitable for this approach and try to keep up with the latest version from the Android Open Source Project.

Canary can write your emails, prioritize what needs attention, silence spam & much more. Say hello to your Inbox Copilot!

Talanoa is the first inbox designed around people. Cut the noise, focus only on what matters.

Vivaldi Mail is a free email service with no ads and no strings attached developed by Vivaldi Technologies. It also offers contacts and calendar features, search capabilities, folders management, WEB/POP/IMAP access, 10GB of storage capacity, 20 MB of maximum attachment size...

BlueMail is a modern, mobile first, powerful Email management tool with a sleek design, unified inbox and support for all your accounts: IMAP,Exchange,POP3.

Replace a multitude of services and apps with a single ecosystem for your business to work in. Explore the tools of Bitrix24.

Transform your inbox into a collaborative workspace with integrated chat-like emails, cross-platform compatibility, and robust task management features.

Wino is a lightweight native mail client for Windows 10/11. It is still in active development. Main motivation for this project is to replace Mail & Calendar for Windows with modern Windows design without using web technologies for speed.