Zulip Alternatives for Online

Skype is a versatile communication platform offering free voice and video calls to other Skype users, as well as affordable calls to landlines and mobile phones worldwide. It provides instant messaging, file sharing, and screen sharing features, making it a comprehensive tool for personal and professional connectivity across various devices.

Google Hangouts was a versatile communication platform offering instant messaging, voice and video calls, and SMS capabilities directly from web browsers and mobile devices. Integrated deeply with Gmail and other Google services, it provided a convenient way to connect and collaborate across various platforms.

Telegram is a fast and secure cloud-based instant messaging platform offering robust privacy features, large group support, file sharing, and cross-platform synchronization, making it a versatile communication tool.

Slack is a leading cloud-based platform designed for team communication and collaboration. It offers a central location for conversations, file sharing, and app integrations, enabling teams to work more efficiently and stay connected regardless of location.

Trillian is a versatile, multi-protocol instant messaging client that unifies various communication platforms like IRC, XMPP, and more into a single, user-friendly interface. It's designed for both personal and team collaboration, offering features like encrypted chats, group collaboration tools, and extensive customization options.

Discord is a versatile free communication platform designed initially for gamers but now widely used for communities of all types. It offers voice and text chat, video calls, and robust server customization for groups of any size, providing a centralized hub for real-time interaction and community building.

Facebook Messenger is the official messaging application from Facebook, enabling users to connect with friends and family through text, voice, and video calls, as well as group conversations and media sharing.

Glip, by RingCentral, is a comprehensive team collaboration platform combining real-time messaging, video calls, task management, and file sharing into a single, searchable hub. Designed to streamline communication and workflow, it aims to replace disjointed tools with a unified digital workspace.

LINE is a versatile communication platform offering free voice and video calls, messaging, and a wide array of interactive features to connect with friends and family globally. It goes beyond basic chat with unique stickers, timeline posts, and integration with various services, providing a comprehensive social and communication experience in one app.

Wire is a secure, cross-platform messaging and collaboration client offering end-to-end encryption by default for all communication types including messaging, voice and video calls, and file sharing across desktop and mobile devices.

ICQ is a veteran instant messaging platform offering a wide range of communication features, including text chat, voice and video calls, screen sharing, and group chats. It aims to provide a reliable and feature-rich messaging experience with a focus on privacy and security.

Matrix is an open network for secure, decentralized real-time communication. It provides a flexible protocol for developers to build collaborative applications like instant messaging, VoIP, and video conferencing, enabling seamless communication across different service providers.

TribeScale is an all-in-one platform designed to streamline team coordination, encompassing communication, goal management, task delegation, and progress tracking to enhance productivity and alignment within organizations.

Flock is a comprehensive communication and collaboration platform designed for teams. It streamlines workflow and enhances productivity through integrated messaging, project management tools, and seamless file sharing within a secure environment.

Zoiper is a versatile and easy-to-use SIP softphone designed for clear voice and video communications. It offers excellent audio quality, robust security features, and seamless integration with various communication protocols, making it ideal for personal and business use.

GroupMe is a free group messaging app that makes it easy to stay connected with friends, family, and colleagues. With its intuitive interface and cross-platform compatibility, GroupMe simplifies communication for any size group.

Gitter is a free and open-source instant messaging and chat service designed specifically for developers and users of GitHub projects. It provides real-time communication within the context of software development teams and communities.

Dialog Messenger is a robust, feature-rich enterprise messaging solution designed for businesses prioritizing security, privacy, and control. Available for both private server deployment and cloud hosting, it facilitates secure text, voice, and video communication across multiple devices, enabling seamless collaboration and real-time interaction within organizations.

Hack Chat is a refreshingly simple and open-source chat application designed for immediate, no-nonsense communication. Forget complex sign-ups and cluttered interfaces; Hack Chat gets you talking instantly in various channels.

mySMS is a comprehensive cross-platform messaging solution that extends your smartphone's texting capabilities to your computer and tablet. It allows you to send and receive SMS messages from virtually any device, enhancing convenience and efficiency.

Dasher Messenger is a feature-rich instant messaging application designed for connecting with friends and groups. It goes beyond basic text messaging, offering capabilities to share various forms of media, integrate external content, and even facilitate peer-to-peer transactions.

Toky is a comprehensive cloud-based phone system designed for businesses, offering voice calls, SMS, call recording, and integrations with various CRM and business tools. It provides teams with a flexible and powerful communication platform for customer support and internal collaboration.