Discord All-in-one voice, video and text chat for gamers that’s free, secure, and works on both your desktop and phone. Freemium $ $ $ Mac Windows Linux Web Android ... iPhone BSD FreeBSD Voice Call Share your screen Chat Bot Free voice/text servers ... Text chat Video calling Ad-free Group chat Push to talk Custom roles Encrypted chat Low Latency Multi Channel Reactions Browser based app Channel manager Community based Dedicated Server Hosting Development API Direct Messaging Specific for Gaming In-app server browser Interface Overlay Low bandwidth usage Low memory usage Night mode Permission system Persistent Chat Photo Sharing Positional audio Public groups chat Responsive design Share files Single Sign-On Team Collaboration Add a feature 484 Like Good app for your personal use. Wouldn't recommend for an Enterprise setting which is what Slack is more geared towards. TheBeast • Jan 2017 • 4 agrees and 1 disagrees Disagree Agree Great app that even supports video meetings Guest • Apr 2016 • 3 agrees and 1 disagrees Disagree Agree Better voice quality, easier to setup and use mrlegendanny • Jan 2018 • 1 agrees and 0 disagrees Disagree Agree Discord is more gamer oriented than business oriented. alexandrezanni • Jan 2018 • 1 agrees and 4 disagrees Disagree Agree
Hangouts Hangouts is a messaging app that lets you send and receive messages, photos and more, and even start free video and voice calls – one to one or with a group! ... Free Windows Web Android iPhone Chrome OS ... Android Tablet iPad Chrome Android Wear Gmail integration Group chat Multi Device Support Texting ... Voice Call Voice messages WebRTC Add a feature 942 Like
Mattermost Mattermost is an open source, self-hosted Slack alternative. As an alternative to proprietary SaaS messaging, Mattermost brings... Free Open Source Mac OS X Windows Linux Android iPhone ... Android Tablet iPad Self-Hosted JavaScript Go (Programming Language) Cloudron Team Collaboration Data API Group chat Integrated File Sharing ... MarkDown support On-premises software Plugin API Slack integration Add a feature 117 Like Its the same but you keep your server where you want so no one is playing with your data, and you can have an unlimited history depending on what you need for free so really way better ! Guest • May 2017 • 2 agrees and 0 disagrees Disagree Agree It is very much a Slack clone with added features + it's open source! Guest • May 2017 • 1 agrees and 1 disagrees Disagree Agree Mattermost is quite versatile and has been used within several of my past employers. Guest • May 2018 Disagree Agree 1. Open source; 2. most of the same functionality; 3. secure and private server possibilities (the data is, therefore, yours until the end of time); 4. extra features when it comes to customization, a big difference actually. Only negative is that Slack look a lot better design wise, so you can't customize it optimally. Guest • May 2017 • 0 agrees and 1 disagrees Disagree Agree
Riot.im Riot (formerly Vector) is an opensource interoperable app running on Web, iOS and Android. It is built around chat rooms, both public and private and provides messaging... Free Open Source Linux Web Android iPhone iPad ... Self-Hosted Chrome Safari F-Droid Firefox End-to-end encryption Decentralized Group chat Matrix.org protocol ... Voice Call Built-in File transfer Encrypted chat GitHub integration Group collaboration Server Moderation Server side history Slack integration Team Collaboration Video calling Add a feature 154 Like decentralised, federated, end-to-end encrypted communication. User6044478 • Oct 2017 • 5 agrees and 0 disagrees Disagree Agree It's built atop Matrix, which provides distributed, federated instant messaging, voice and video calling with the ability to bridge into other networks (IRC, etc.) lampholder • Jul 2017 • 3 agrees and 0 disagrees Disagree Agree Free and opensource with better performance and features for team communication. Guest • Aug 2017 • 2 agrees and 0 disagrees Disagree Agree Federated, free standard and free software Guest • Feb 2018 Disagree Agree because its open source, decentralised, and end-to-end secure. Plus the folks at matrix.org are working to get us out of our communication silos by creating standards for communication interoperability! brinerustle • Mar 2018 Disagree Agree
Wire Wire is a secure and private messenger for phones, tablets and desktop. Crystal clear voice and video calls, private group chats, file sharing, audio and video messages... Free Personal $ $ $ Open Source Mac Windows Linux Web Android ... iPhone Android Tablet iPad End-to-end encryption Security focused Encrypted calls Encrypted chat ... Group chat Integrated File Sharing Photo Sharing Privacy focused Privacy Protected Share your screen Video calling Voice Call WebRTC Add a feature 158 Like
Zulip Zulip is a group chat app. Its most distinctive characteristic is that messages are threaded by topic, helping you have long-running, organized conversations.... Free Open Source Mac Windows Linux Web Android ... iPhone Android Tablet BSD Self-Hosted Threaded Conversations Group collaboration Chat Bot Community based ... GitHub integration Group chat Integrated File Sharing MarkDown support Team Collaboration Add a feature 111 Like Three reasons: 1. Open source. 2. Stream 3. Topics abijith • Dec 2017 • 3 agrees and 0 disagrees Disagree Agree It's open source, and has really good threaded conversations. aviendha1591 • Nov 2017 • 2 agrees and 0 disagrees Disagree Agree Zulip offers a great unbeatable chatting experience. It shines in many places where Slack tends to slack. Sethu • Dec 2017 • 1 agrees and 0 disagrees Disagree Agree Open-source, streams, topics, quick responses from devs hrishikeshpatil • Jan 2018 Disagree Agree Great community Easy Access Many organization sirepherox • Jan 2018 Disagree Agree It is open source and has a lot of topics. Guest • Jan 2018 Disagree Agree Zulip is very user friendly and is also open source! linacodes • Jan 2018 Disagree Agree
Matrix.org Matrix is an open standard for decentralized persistent communication over IP. It can be used for decentralised group chat, WebRTC signaling, IoT-data transfer, ... Free Open Source Mac Windows Linux Web Android ... iPhone Android Tablet iPad Self-Hosted WebRTC Python JavaScript Go (Programming Language) Java Perl End-to-end encryption Decentralized Chat Bot Distributed ... Encrypted chat GNU/linux-libre Group chat Real time collaboration Server side history Team Collaboration WebRTC Add a feature 74 Like Capable of everything Slack can do, but can be self-hosted - keeping a team's data in-house. nrg200 • Jul 2017 Disagree Agree It can be easily bridged to many other chat systems, including Slack, which makes transitioning *much* easier. It's also open source and decentralized (self-hostable + communication with other servers). Guest • Jul 2017 Disagree Agree Free open source instant messaging service with federation. Guest • Aug 2017 Disagree Agree Open source, fecentralized, federation, chat-voice-video function. User6044478 • Oct 2017 Disagree Agree Respects your Freedom. Increasingly popular Guest • Nov 2017 Disagree Agree
Rocket.Chat Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework. Free Open Source Mac Windows Linux Android iPhone ... Self-Hosted Cloudron Ad-free Chat Bot Extensible by Plugins/Extensions Group chat ... Integrated File Sharing Location Mapping Share your screen Voice messages Add a feature 69 Like Does everything Slack does AND it's open source. However, it's also self-hosted. This means you have to put in the effort to set it up, but you control your own data, which is a huge advantage to your privacy - your chats and files don't sit on someone else's servers, ready for them or hackers to look at. JohnFastman • Dec 2016 • 1 agrees and 0 disagrees Disagree Agree
HipChat HipChat is an instant messaging service designed for companies and teams. It has persistent chat rooms, one-to-one chat, searchable chat history, file sharing via drag... Freemium Mac OS X Windows Linux Web Android ... iPhone Android Tablet iPad Self-Hosted Apple Watch Team Collaboration Integrated File Sharing Share your screen Add a feature 72 Like Simple, very fast desktop client. Good web client. Guest • Feb 2018 Disagree Agree
Basecamp Basecamp is a web-based project collaboration tool that allows groups of people to share files, meet deadlines, assign tasks, and centralize feedback. Commercial $ $ $ Mac Windows Web Android iPhone ... iPad Content Templates Gantt-charts Sync with Google Calendar iCal integration ... Support for @mentions Outlook integration Real time collaboration Social feed Add a feature 182 Like Slack is a communication/chat tool. Basecamp is project management. Guest • Aug 2017 • 2 agrees and 0 disagrees Disagree Agree It is completely free for education users, and allows deeper integration with files and documents, allowing chat to be just that: chat. It also allows for several levels of organization and just about everything is customizable. Zeklandia • Apr 2018 Disagree Agree
Glip Glip is instant messaging for teams and businesses to communicate and get work done at the same time. In Glip you work where your conversations are, so you always know... Freemium Mac OS X Windows Web Android iPhone ... Android Tablet iPad Social feed Bitbucket Integration Box.com integration Built-in File Manager ... Calendar view CRM Dropbox integration GitHub integration Google Drive integration Group chat Group collaboration Mailchimp integration Meeting notes Onedrive integration Real time collaboration Recurring tasks Share your screen Shared calendars Sync Calendars Team Collaboration Team work Trello integration Zapier integration Zendesk integration Add a feature 154 Like Has practically all of slack's features, plus tasks, calendar, etc. And the free account does not limit number of users or storage. Guest • Jun 2016 • 2 agrees and 0 disagrees Disagree Agree
TribeScale TribeScale is a startup that aims to enhance teamwork in companies through the improvement of communication, coordination, and the pace on the basis of targets set. Free Mac OS X Windows Web Android iPhone ... iPad Self-Hosted Goal setting Goal Tracking Group chat Group collaboration ... Real time collaboration Team Collaboration Team work Add a feature 24 Like
YES NO Signal TextSecure and RedPhone have been merged to create Signal! Using Signal, you can communicate instantly while avoiding SMS fees... always-running built-in-file-transfer chat-clients color-coding contacts-integration
YES NO Tox Send messages, files, create groups and make Tox to Tox audio and video calls. Securely. ad-free aim anonymous-secure-filesharing built-in-player chat-clients
YES NO Mumble Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming. channel-management chat-bot communications development-api encrypted-chat
