What are the best office messaging apps?
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Creative implementation which is very good for personal journaling or drafting/collecting ideas. Previously, to do this, users needed to create a private channel with themselves. Note that some other team-chat apps may disallow creating group/channel with no 2nd person(s). See More
Slack says that their free accounts support an unlimited number of users, which is true. However they don't mention that there is an undisclosed maximum number of users per channel (8462). For a large open source community, this is something to keep in mind. See More
If you are worried about third-parties getting access to your data you should consider self-hosting. With self-hosting you are in control over where your data is stored, who has access to it. You will also not be vulnerable to exploits of a third-party provider. See More
At $6.67 per user / month (or $8 if billed monthly) , Slack is significantly more expensive than the competition if you need features such as unlimited integrations (more than 10) or unlimited message storage (more than 10,000). However, the free version of Slack includes unlimited users. However if you need only unlimited messages you can use storage services like https://slarck.com to upload then browse and search your entire message history, while staying in Slack's free plan. So with a combo of Slack+Slarck this con is not that major. See More
Notifications are handled separately for mobile and the web app. You can receive notifications for all messages, just direct messages, or based on filters, and you can have different settings for different channels: you don't have to get notified every time someone pushed to GitHub or every time someone posts to off-topic chat, unless you want to. See More
The entire Slack interface is polished and intuitive to use. There are very few bugs or inconsistencies in the UI and it's very fast to use. There is nothing in particular that is new with Slacks implementation of team chat, but the execution of the groups (called channels), search, external service integration and notifications is close to perfect. See More
Slack integrates with tools like Trello, GitHub, Dropbox, Mailchimp, and dozens of others, so you can have a centralized event feed of your project right alongside your chat. This is tremendously useful for keeping context with your discussions. See More
Instead of rooms or channels Zulip is built around topics. This allows you to have multiple conversations at the same time without conversations interfering with each another. It also allows you to reference conversations without clutter. See More
Although Microsoft is already working on/testing improvements in this area, multi-tenancy using different logins is currently a pain for anyone who has to switch back and forth on a frequent basis. The main problem is it's slow. The app currently cannot store multiple credentials, so it forces you to log out and in again every time. Crossing organizations using the same account could also be improved, but isn't nearly as bad. See More
My own experiences using Teams for messaging and collaboration have been quite good*. I use both the Office 365 Business version and the free version for collaboration outside of work. Teams features chat in topic/project-specific channels, in general channels that can be organization-wide and even private chat which only users you specify can see. Teams video/audio conferencing and screen sharing is also very good. Tabs inside of channels is a powerful feature, allowing Microsoft and third-party tools, including documents, spreadsheets,j other files, calendars, task lists, external websites, internal wikis, etc. to be accessed without leaving Teams. *As of 2019, Microsoft Teams is used by more organizations and has more daily users than previous #1 Slack. An "office messaging apps" list that didn't even include Teams didn't make sense, so I'm adding it now. See More
Mike G's Experience
Using the tab interface you can integrate an Asana list, an entire Trello board, a power bi report, a Word page, a ppt presentation and let everyone edit it and view the edits in the tab. You can also add a file manager thanks to Onedrive or Sharepoint or a video training hub. See More