Dispatch by Mio
Published in

Dispatch by Mio

Don’t block Slack — the best alternatives

A team rejecting Slack enterprise messaging
How to block Slack in the office

Don’t block Slack.

Slack now boasts 10 million daily active users (DAU). As one of the most popular productivity tools in the world, Slack connects everyone, anywhere and at all times. On the surface, it can seem like a valuable tool to have. After all, constant communication paves the way for collaboration.

If all your employees used Slack alone, you’d have a streamlined digital environment for office-workers and remote team members alike. The only trouble is, Slack may not be the only app you want to use for collaboration. You might prefer Cisco Webex Teams to accompany your Cisco phone system, or Microsoft Teams alongside your Office 365 strategy.

When Slack isn’t the tool you want your teams to use, how do you stop business conversations in unregulated environments?

Why block Slack?

When implementing Microsoft Teams or Cisco Webex Teams, Slack could be a distraction and a security threat. If your employees use Slack without your permission, they’re sharing data in an environment that you can’t monitor or regulate. This leads to issues with privacy, security and compliance.

What’s more, you could end up with siloed teams as certain employees spend more time checking Slack notifications than paying attention to the tools that you would prefer them to use.

For some, the only solution seems to be learning how to block Slack. Unfortunately, preventing your employees from accessing their preferred resources is easier said, than done and shadow messaging often lives on.

Could blocking slack help with Shadow messaging?
Shadow messaging often lives on even if you can block Slack

Block Slack by blacklisting

The easiest way to block Slack is to treat it as another undesirable entity on your firewall. Just as you would add explicit sites to a blacklist, you can also add Slack, and keywords associated with it to your filtering list. Employees can no longer load Slack or check their messages.

Block Slack by port blocking

You can even block your employees from accessing anything other than their emails and the company intranet by port blocking. Port blocking is when an Internet Service Provider (ISP) identifies Internet traffic by the combination of port number and transport protocol and can block that traffic entirely.

The downside of this is that you could accidentally block a tool that’s necessary for productivity.

The problem with blocking Slack

The biggest problem with both of these options is that that they only stop your employees from using Slack on their workplace computers or through the business Wi-Fi. There’s nothing to stop your team members from installing and using Slack on their smartphones and accessing via mobile data. Slack effectively becomes another shadow IT app like WhatsApp or Facebook.

Even if you could figure out how to block Slack in your office without impacting other apps, you run the risk of upsetting everyone that favors it for team chat. By limiting choice in the workplace, you could damage both workplace culture and your reputation as an employer.

So, what are the other options?

People in a team trying to connect enterprise messaging apps
Often there is too much choice in the workplace

What to do when blocking Slack doesn’t work


Guidelines could be produced for employees who refuse to stop using Slack. For instance, let them know that they can only use Slack for basic chat between team members, rather than using it to share sensitive company data. However, these are guidelines and can be interpreted differently or ignored.

Benefits of Slack

A better option is to introduce your employees to the benefits of the chat app you want them to use. Host a working lunch around how to make the most of your Cisco Webex Teams tool or your Microsoft Teams accounts.

Send your teams a few blogs from the Slack site and other tips on how to maximize productivity using Slack.

Of course, once again, you’re hoping that your employees won’t go back to Slack the first time that they encounter a hurdle with the alternative app. And humans are creatures of habit. If your team members decide to continue using Slack — and you’ve discontinued it — then your IT team won’t be aware of it and can’t support it.

A magnifying glass over the Slack logo
Slack can still appear in enterprises even when blocked

The best solution to blocking Slack

You can’t just give up on creating a secure, productive and well-synced business environment. Fortunately, with Mio — you don’t have to compromise on your collaboration and communication strategy.

Mio lets teams use the tools that they prefer, without creating silos or security issues. At the same time, the users that you have allocated new Microsoft or Cisco accounts to get the tool of your choosing. By linking your Microsoft Teams, Cisco Webex Teams, and Slack channels together, Mio ensures that everyone keeps working together productivity, without placing additional pressure on your IT teams.

With Mio, messages sent from Slack can appear on Microsoft Teams channels and vice versa. You can even share files from one app to another, without having to switch between tools. Everyone gets to use the tools they like the most!

Stop trying to figure out how to block Slack in the office and the best solution to blocking Slack. We speak to enterprises going through this same scenario day in day out. To learn more about how Mio is solving the problem of blocking Slack, check out this video.

🤖 Thanks for reading! Be sure to👏 this post if you like it, and follow us here on Medium as well as LinkedIn & Twitter.



Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store


Chat better, together. Mio powers cross-platform messaging across Microsoft Teams, Slack, Webex, and Zoom. Learn more at https://m.io