Free

Hangouts is an instant messaging software developed by Google.

Open Source

Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

Glip

Freemium

Glip is fully searchable, real-time group chat; video chat, task management, file sharing app.

Mattermost

Open Source

Mattermost is an open source, private cloud Slack-alternative, Workplace messaging for web, PCs and phones. MIT-licensed.

Ora

Commercial

Ora is a real-time all-in-one workspace for teams.

eXo Platform

Commercial

eXo Platform is an open source, standard-based, Enterprise Social Collaboration Platform.

Matrix.org

Open Source

Matrix is an open protocol for real-time communication. It is designed to allow users with accounts at one communications service provider to communicate with…

Whaller

Freemium

Whaller allows teams and organizations to create their own internal social networks, meaning no adverts and no data exploitation.

Conversations

Freemium

Conversations is an open source XMPP/Jabber client for the Android platform.

Priority Matrix

Commercial

Priority Matrix is a time management software application that is supported on a number of platforms, including Microsoft Windows, Mac OS X, Android, and iOS.…

Flock

Freemium

Flock is a communication app for teams. Packed with tons of productivity features, Flock drives efficiency and boosts speed of execution.

Fleep

Freemium

Fleep enables communication within and across organizations, be it your team chats, project communication or 1:1 conversations.

Zulip

Open Source

Zulip is a chat and collaborative software.

Flowdock

Commercial

Flowdock is a group chat for teams which integrates with GitHub, Jira, Trello.

Wickr

Free

Wickr is an instant messenger application.

Hack Chat

Open Source

Hack Chat is a minimal, distraction-free chat application.

Stackfield

Freemium

Stackfield provides end-to-end encrypted communication and collaboration with tasks, documents and projects for business teams.

Discord

Free

Discord is a freeware proprietary VoIP application designed for gaming communities.

Basecamp

Commercial

Basecamp is a project management web app.

Samepage

Freemium

Wire

Free

Wire is a cross-platform, encrypted instant messaging client created by Wire Swiss. It is available for iOS, Android, Linux, Windows, macOS and Web browser cl…

Rocket.Chat

Open Source

Rocket.Chat free open source chat solution.

Threema

Commercial

Threema is an encrypted instant messaging application for iOS, Android and Windows Phone.

Let's Chat

Open Source

Let's Chat is a persistent messaging application that runs on Node.js and MongoDB. It's designed to be easily deployable and fits well with small, intimate te…

Hibox

Freemium

Hibox provides task management, business chat and video calls.

TribeScale

Free

TribeScale is an All-in-One platform to coordinate your team around what really matters - communication, goals, decisions, tasks and results.

Yammer

Commercial

Yammer is a freemium enterprise social networking service used for private communication within organizations.

Grape

Commercial

Grape is an REST-like API framework for Ruby. It's designed to run on Rack or complement existing web application frameworks such as Rails and Sinatra by prov…

Jostle

Commercial

Jostle is a people engagement platform mainly focused on employee engagement.

kune

Open Source

kune is a distributed social network software.

Dialog Messenger

Free Personal

Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.

Gitter

Freemium

Gitter is an open source instant messaging and chat room system for developers and users of GitHub repositories.

Hubgets

Commercial

Hubgets provides chat, voice and video turning team communication.

Compare Slack with alternatives

Hangouts vs Slack

Compare Hangouts and Slack and decide which is most suitable for you.

Discord vs Slack

Compare Discord and Slack and decide which is most suitable for you.

Jitsi vs Slack

Compare Jitsi and Slack and decide which is most suitable for you.

Basecamp vs Slack

Compare Basecamp and Slack and decide which is most suitable for you.

Glip vs Slack

Compare Glip and Slack and decide which is most suitable for you.

Samepage vs Slack

Compare Samepage and Slack and decide which is most suitable for you.

Mattermost vs Slack

Compare Mattermost and Slack and decide which is most suitable for you.

Wire vs Slack

Compare Wire and Slack and decide which is most suitable for you.

Ora vs Slack

Compare Ora and Slack and decide which is most suitable for you.

Rocket.Chat vs Slack

Compare Rocket.Chat and Slack and decide which is most suitable for you.

eXo Platform vs Slack

Compare eXo Platform and Slack and decide which is most suitable for you.

Threema vs Slack

Compare Threema and Slack and decide which is most suitable for you.

Matrix.org vs Slack

Compare Matrix.org and Slack and decide which is most suitable for you.

Let's Chat vs Slack

Compare Let's Chat and Slack and decide which is most suitable for you.

Whaller vs Slack

Compare Whaller and Slack and decide which is most suitable for you.

Hibox vs Slack

Compare Hibox and Slack and decide which is most suitable for you.

Conversations vs Slack

Compare Conversations and Slack and decide which is most suitable for you.

TribeScale vs Slack

Compare TribeScale and Slack and decide which is most suitable for you.

Priority Matrix vs Slack

Compare Priority Matrix and Slack and decide which is most suitable for you.

Yammer vs Slack

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Flock vs Slack

Compare Flock and Slack and decide which is most suitable for you.

Grape vs Slack

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Fleep vs Slack

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Jostle vs Slack

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Zulip vs Slack

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kune vs Slack

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Flowdock vs Slack

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Dialog Messenger vs Slack

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Wickr vs Slack

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Gitter vs Slack

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Hack Chat vs Slack

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Hubgets vs Slack

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Stackfield vs Slack

Compare Stackfield and Slack and decide which is most suitable for you.

Slack Alternatives

Compare Slack with alternatives