Top 12 Open-Source Alternatives to Flock

The top open-source alternatives to Flock are Mattermost, Bitrix24, and Rocket.Chat. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Mattermost Landing Page
1

Mattermost

Mattermost is an open source alternative to Slack.
Pricing:
- Open Source
#Team Collaboration #Work Collaboration #Web And Video Conferencing 59 social mentions
Bitrix24 Landing Page
2

Bitrix24

Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
Pricing:
- Open Source
- Freemium
- Free Trial
- $69.0 / Monthly (6 users / 50 GB / CRM+)
#Project Management #Task Management #Communication
Rocket.Chat Landing Page
3

Rocket.Chat

Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Chat 65 social mentions
Discord Landing Page
4

Discord

Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 122 social mentions
Basecamp Landing Page
5

Basecamp

A simple and elegant project management system.
Pricing:
- Paid
- Free Trial
- $99.0 / Monthly (flat price)
#Project Management #Productivity #Task Management 37 social mentions
Trello Landing Page
6

Trello

Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Pricing:
- Freemium
- Free Trial
- $12.5 / Monthly (Per user - Business Class)
#Project Management #Task Management #Productivity 231 social mentions
Zulip Landing Page
7

Zulip

Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 50 social mentions
MirrorFly Landing Page
8

MirrorFly

World's Most Scalable Voice, Video & Chat SDK for Small, Medium & Enterprises
Pricing:
- Open Source
- Paid
- Free Trial
#Communication #Chat SDK #Group Chat & Notifications 8 user reviews
Yammer Landing Page
9

Yammer

Yammer is a leading enterprise social network used by more than 200,000 companies worldwide, including 85% of the Fortune 500, to get work done smarter and faster. Sign Up Today.
Pricing:
- Open Source
#Project Management #Task Management #Communication
Wire Landing Page
10

Wire

Private & Secure Messenger
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 14 social mentions
Teams.cc Landing Page
11

Teams.cc

Teams chat software is a workplace communication tool, a single place for messaging, integration, sharing files, and much more. Get access to 37+ apps for $14.99 per user.
Pricing:
- Open Source
- $14.99 / Monthly (1 user)
#Communication #Team Communication #Collaboration 20 social mentions
Notion Landing Page
12

Notion

All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Pricing:
- Open Source
#Productivity #Work Collaboration #Note Taking 438 social mentions