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Top Rated Instant Messaging & Chat Software with Open source - Page 6

Last updated: October 2026

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185 software options

ValueOps logo

Chat & inbox software for teams

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Flowdock is a collaboration app that integrates chat and team inbox.

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Google Chat logo

Communication tool for businesses and non-profits

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Google Chat is a communication software that helps businesses of all sizes and non-profit organizations collaborate on projects and tasks. It lets users set up virtual chat rooms and chat threads, track task progress, and create follow-up tasks on a centralized platform.

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Teambridge logo

AI-native workforce management for the modern frontline.

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Teambridge combines AI-powered onboarding, scheduling, time tracking, employee communications, and a branded mobile app into one workforce management platform that automates operations, improves compliance, and simplifies frontline workforce management.

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Xoxoday logo

Global rewards, recognition, loyalty and incentive solutions

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An AI-powered platform offering businesses a comprehensive suite of loyalty, rewards, incentives, and engagement solutions. Designed to help organisations acquire, retain, and engage customers, partners, employees, and sales teams, Xoxoday enables personalised, technology-driven reward experiences

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Zimbra Collaboration Suite logo

Enterprise collaboration and online community software.

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Zimbra Collaboration is an enterprise-class solution for company collaboration with email, calendar and file sharing tools. Zimbra community provides a private social networking space and online community, a place for customer support, with online knowledge bases and other helpful documentation.

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Front logo

AI-enabled customer service platform for collaboration

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Front is a customer operations platform that enables support, sales, and account management teams to deliver exceptional service at scale. Front streamlines customer comms by combining the efficiency of a help desk and the familiarity of email, with automated workflows and real-time collaboration.

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Zoho Connect logo

Enterprise private social network

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Connect in real-time with colleagues with Zoho Connect's private messaging, one-to-one chat, and group chatrooms

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CxEngage logo

Video, audio & web conferencing platform

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Lifesize is an audio, web & video conferencing tool which supports chat functionality, an integrated search-based directory, plus video call recording & sharing

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Otter.ai logo

Cloud-based AI meeting agent for teams

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Otter.ai is a cloud-based AI meeting agent that records, transcribes, and summarizes Zoom, Google Meet, and Teams meetings in real.

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Mattermost logo

Open source workplace messaging for web, PCs & phones

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Mattermost is an open source workplace messaging system for web, PCs & phones, that supports 1-1 & group messaging, file sharing, multiple languages, & more

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Hive logo

Where projects and teams come together.

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Hive is the all-in-one project management and collaboration platform that eliminates tool sprawl.

Manage projects with Gantt charts, Kanban boards, or calendars. Communicate through built-in chat and real-time collaborative notes. Track time, allocate resources, and set goals—all in one place.

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MangoApps logo

Bring your frontline and office teams together

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MangoApps is a unified employee experience platform that serves as a bridge between your desk and deskless workers. We combine intranet, communication, collaboration, and training into a single user-friendly workspace.

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Trello logo

Visual collaboration tool for shared project perspectives

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Trello is a project management tool that helps teams organize and manage their tasks. It caters to a range of industries and teams, from marketing to engineering. Trello's simple and intuitive interface makes it easy for any team to get started and stay on top of their work.

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Bria logo

VoIP communication and collaboration management solution

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Bria is a cloud-based and on-premise VoIP solution that helps businesses manage communication & collaboration via messaging, file sharing, video conferencing & more. The white-label capabilities help organizations design a personalized softphone using custom logos, themes, colors, and configuration.

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Jive logo

Interactive intranet and collaboration hub for business.

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Jive's Interactive Intranet unites your people, information and content in a single hub for getting work done. It's a secure out-of-the-box solution for company communications, collaboration, knowledge-sharing, with an engaging user experience that drives adoption and productivity.

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5pm logo

Project management on time

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5pm is a project management tool with an easy interface and a balanced set of features, like Social Toolbar that allows team members to chat in real time.

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Amazon Chime logo

Online meeting & video conferencing solution

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Amazon Chime is an online meeting solution designed to streamline the process of organizing & conducting voice calls, video calls & conferences, and more

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Zoho Desk logo

Cloud-based help desk for all business sizes

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Cloud-based omnichannel help desk platform unifying tickets from email, chat, social media, and phone for businesses of all sizes.

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Rocket.Chat logo

Bring together messaging, voice, video, critical apps, and A

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Bring messages, video calls, file sharing and all team communication into one place and boost your business efficiency. Empower your team to work quicker with real-time text messages. Control permissions, audit previous messages and never miss information again with the saved chat history.

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RingCentral Video logo

Video conferencing software with screen sharing & team chat

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RingCentral Video is a cloud-based video conferencing platform designed to help businesses conduct virtual meetings from multiple devices such as desktops, tablets & mobile devices. The solution offers collaboration tools including audio and video calls, screen sharing, integrated messaging & more.

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Sideline logo

Your Phone’s Other Number.

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Sideline puts a reliable 2nd number on the phone you already have.

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When I Work logo

Staff scheduling, time tracking, and communication tool

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Use When I Work to schedule, track time and attendance, and communicate with employees, all in one place. Create schedules quickly and easily, and send the schedule to staff with just a click. Save time. Improve accountability. 14-day free trial.

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Podio logo

Cloud-based tool for collaborating on and managing projects

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Podio is a business software that helps teams work together more effectively. It provides a centralized platform for managing projects, tasks, and communication. Podio caters to a range of industries, including accounting, real estate, and marketing agencies, enabling teams to streamline their workflows and boost productivity.
A tool that your team will love to use, that's entirely customizable to suit how you run projects most efficiently.

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Google Meet logo

Messaging, voice, and video calls for team communication

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Google Meet is a video conferencing platform for teams to communicate via messaging, voice, and video. Features include high-definition video and audio conferencing for up to 100 participants, multi-device chat sync, stored chat history, real-time captions, meeting recording function, and more.

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Asana logo

Project tracking and workflow management platform

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Asana is a chat and collaboration tool where you can connect all your work in one place and bring teams together, anywhere. From lists to boards, to calendars and gantt charts, organize work your way. Join millions of teams across 190 countries who use Asana to get more done.

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