Mattermost vs Flock

Slack

WhatsApp

Google Meet

Microsoft Teams

Rocket.Chat

Twist 

Compare Mattermost and Flock based on features, pricing, verified reviews, integrations & more on GetApp. Find out which software is best for your business in 2026.

Slack is a single workspace that connects users with the people and tools they work with everyday, no matter where they are or what they do

Rocket.Chat is a reliable Enterprise Communication Platform for high-private team chatting and collaboration. Reduce operational costs and improve customer experience by centralizing messages from employees and external customers on the same platform.

Microsoft Teams is a chat-based workspace in Microsoft 365 which lets users collaborate on documents, make voice & video conference calls, view chat logs, and more. Teams has replaced Skype for Business as Microsoft's online meeting solution.

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

Access Controls/Permissions

Active Directory Integration

Alerts/Notifications

Audio Calls

Brainstorming

Business Process Automation

Chat/Messaging

Collaboration Tools

Communication Management

Conferencing

Contact Management

Content Management

Customizable Branding

Discussions/Forums

Document Management

Employee Database

Employee Photos

File Sharing

File Transfer

Group Management

Group Messaging

Live Chat

Meeting Management

Mobile Access

Multi-Language

Multi-User Collaboration

Productivity Tools

Project Management

Real Time Editing

Real-Time Chat

Remote Access/Control

Reporting/Project Tracking

Role-Based Permissions

Screen Sharing

Search/Filter

Single Sign On

Surveys & Feedback

Task Management

Team Collaboration

Third-Party Integrations

Transcripts/Chat History

Version Control

Video Conferencing

Workflow Configuration

Mattermost

Android

Linux

Web-based

Windows

iPad

iPhone

Software Developer

The incoming hook limitation of maximum content length is the hell (Mattermost don't inform the customer about a message which was higher above the hard coded message size limit).

Marketing Manager

What I like the most about this collaboration software is the simple and logical UI, which is not overloaded with lots of unnecessary features. It has all we need for successful communication.

Cross-platform applications ready to use. Amazing open source community built around the product, friendly and helpful people.

CEO / Lead Architect

The software is easy to use, similar to the commercial app Slack. It provides good thread tracking and the interface is clean and easy to understand.

Scrum Master 

I like how easy is to use and allows different "rooms" for collaboration for teams. It is a great tool for fast daily communication.

IT Security Engineer

Can be hosted on-premise. Good community support - Apps and Integrations brings great support to exchange data with external systems for software development teams.

Chief Growth Officer

Mattermost is intuitive to use and easy to implement in your company. It has a good amount of integrations.

Technical Writer & Digital Marketing Specialist

Honestly, the most use we get out of this product is having fun with the wide range of emojis you can add to posts as reactions.

For its purpose, I have found nothing about the software that I can find to complain about.

Senior Developer

Running the software locally means you can keep a much better eye on its security and usage. Its user management and directory integration is superior to Slack's.

A bad user interface, a lot of bugs, sometime you need to restart it in order to make sure that everything works as expected.

Graphic Designer

That's a nice alternative to Slack. Managing channels and using the entire product is very easy and intuitive.

Head Of Design

It allows all our staff to quickly chat about things without clogging up inboxes or having them on their phones. Groups and channels are great, especially for management needs.

Software developer

Great for communication and to stay connected.

It is good collaborative tool as alternative to slack.

Accountant

When i receive message sometimes i miss notifications. When i click pop up window it doesn't begin conversation, i have to find message in contact list.

Software Engineer

Saved a lot of nerves and money, and vastly improved team communication.

Project Manager

I like the ability to build very specific groups and control notifications in each group. Was a previous Slack user but Slack doesn't fit with our security requirements and the cost.

Mattermost screenshot: Mattermost Channels

Mattermost screenshot: Mattermost Playbooks for workflow automation

Mattermost screenshot: Mattermost Calls

Mattermost screenshot: Mattermost Boards

Mattermost screenshot: Mattermost Agents

Large Enterprises

Mid Size Business

Non Profit

Public Administrations

Small Business

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.

WhatsApp is a customer communications management software that helps businesses of all sizes create product catalogs and respond to customers’ messages or queries in real-time. The software provides end-to-end encryption to secure chats, voice messages, images, audio/video calls, and more.

Twist is work messaging for teams burned out by real-time, all-the-time communication and ready for a new way of working together.

Flock is a collaborative messaging app for teams which enables users to discuss projects and find and share information and ideas effectively and efficiently

Activity/News Feed

Blogs

Calendar Management

Deadline Management

Drag & Drop

Email Reminders

Event Management

Ideation

Member Directory

Messaging

Multi-Channel Communication

Notes Management

Productivity Analysis

Project Planning/Scheduling

Real Time Synchronization

Reminders

Reporting/Analytics

Social Media Integration

Sub-Task Management

Survey/Poll Management

Tagging

Task Editing

Task Progress Tracking

Task Scheduling

Task Tagging

To-Do List

Two-Way Audio & Video

Video Chat

Workflow Management

Flock

Associate Project Manager

Some stage we don't want to spend money but we want a good stuff for the team, and that point this helps a lot. The feature which is enabled till the day is really awesome.

Director

Sending an email following a missed message is crowding my inbox. But overall, I can't think of any serious dislikes.

Cloud Developer

Downloading/Installing and Updating is super easy, Using flock is even easier. Integrations are easy to set up and work fine.

Director International Expansion

Makes interdepartmental communication efficient and quick. I love the ease with which you can share files, and make audio/video calls if chatting is not getting the job done.

Marketing advertising

Very  satisfied my team is working very well and friend in useful easy to connect. We use for team communication.

Chiropractic Assistant

Easy to use, great way for our office to communicate effectively.

UX Designer

Provide notification tone changes in the app version of it. The recent chants are lost whenever one makes a hard refresh.

Owner

This saved me from having to VPN to the office to access my desktop Flock icon. I like that emoji's were added so text can have some feelings.

Overall Flock is a timesaver and great way to help build community in our  franchise.

Interpreter 

Easy to get in all the employees and the employer at same portal and communicate with ease. You can create the rules for your company.

Team Users, easy  to use and secure and friendly users global team.

Director of Development

Flock is a super easy chat platform. It can organize the threads per user with a targeted reply or to the whole group.

Senior Recruitment Consultant

Again, integration in this software is quite effective. Flock is easy to use and it's application is based on the field.

Data Scientist

Notification Lag on Mobile Phone. Notification Lag on Mobile Phone.

owner / MD

And it integrates with our existing project management tool trello. What I also like is the responsiveness of the support team.

Dir Business Development

In choosing for our small company, we found Flock to be a better alternative both cost-wise and overall look and feel.

Since the day 1, we were already working as usual because it replaces all collaborative functions. Furthermore, it integrates with many commons tools like Google Drive and Todoist.

Office Manager

There is only 1 thing I would say is cons, when contacting flock it is sometimes hard to understand what they are saying due to they have a different accent the usa does.

Mattermost vs Flock Comparison (2026)

Mattermost

Flock

Overview

Video & Screenshots

Pricing

User reviews

Key features

Integrations

Alternatives