Flowdock is described as 'beautiful group chat. You can upload files, paste blocks of text, use #hashtags to make notes or create lists and mention others’ names to get their attention' and is an website in the Social & Communications category. There are more than 50 alternatives to Flowdock, not only websites but also apps for a variety of platforms, including Android, iPhone, Mac and Windows. The best alternative is Slack, which is free. Other great sites and apps similar to Flowdock are Mattermost (Freemium, Open Source), Quire (Free), Basecamp (Freemium) and Microsoft Teams (Freemium).
Slack is a unified communication platform built with an optimized workflow to keep modern teams focused and productive. A familiar chat interface facilitates discussions while advanced features are easily exposed based on context.
Gitter is a chat and collaboration tool for developers and users. It's a place for developers to talk. KEY FEATURES - Unlimited public chat rooms for free - Unlimited and searchable chat history - Unlimited integrations - Private chat rooms free up to 25 users
Corteza Messaging is a secure, high performance, open source Slack alternative that allows your teams to collaborate more efficiently, as well as communicate safely with other organisations or customers.