Chatter Alternatives: Top 10 Business Instant Messaging Software in 2025

Zimbra Collaboration is the world’s leading open source messaging and collaboration solution. Zimbra includes complete email, contacts, calendar, file sharing, tasks, and messaging/videoconferencing, all accessed from the Zimbra Web Client via any device. You can deploy Zimbra as a traditional on-prem install or through a Zimbra hosting provider. Enterprise-level chat and video calls built right into Zimbra, the communication tool your users use the most.

Gitter is a chat and networking platform that helps to manage, grow and connect communities through messaging, content and discovery. Enjoy free public and private communities with unlimited people, message history, and integrations. Gitter is designed to make community messaging, collaboration, and discovery as smooth and simple as possible. You can easily create, organize and grow your communities, inviting others to join just in one click.

Element is a multi-purpose secure chat app developed for teams, organizations, and friends group to keep their conversations in control and safe from ads and data mining. It is an open global matrix network that is secured by decentralized end-to-end encryption. It enables the users to group chat, video call, and share data to socialize and stay in touch with friends and family. Element ensures excellent teamwork within an organization and across a business ecosystem using its smart and secure technology. It enables you to keep everyone together from your social clubs to your social movements. It is an open-source platform in collaboration with develops throughout all of Matrix, comprising KDE, GNOME, Gitter, and Mozilla. Users get the feature to connect with everyone, both personally and socially. It ensures a completely secure messaging experience to its users with no third-party access, and absolutely no data mining of any kind. It has an extremely easy-to-use interface with a clean and powerful design. It offers various price variations to suit every budget.

Chanty is a team collaboration app that helps teams communicate and increase productivity. Ping a colleague, online team members or even the whole team to get the quick answer or deliver a solution that needs instant reaction. Create new tasks from scratch or turn any message into a task to enjoy a smarter collaboration with your deadline-driven team. Assign and filter tasks by status, dates and people. Enjoy a flexible, visual and simple way to execute scrum methodology and manage your tasks in one place. Set due date, control status and priority for any task or subtask.