Slack Connect: Everything You Need to Know

Discover Slack Connect and collaborate with up to twenty organizations on one channel. Learn its advantages over shared channels and see how enterprises use it.
Dominic Kent
Dominic Kent is a content marketer specializing in unified communications and contact centers.
A marketing Slack Connect channel

Slack Connect was introduced by Slack on 24th June 2020. After three months of testing with customers like Xero and Boldstart Ventures, Slack released their latest extension of shared channels to the public.

In this post, we dig into what it is, who the target audience is, and how to use it to your advantage.

Jump to:

  1. What is Slack Connect?
  2. Is Slack Connect different from Shared Channels?
  3. How do I use Slack Connect?
  4. Slack Connect DMs
  5. Who is using Slack Connect?

1 - What is Slack Connect?

Slack Connect enables Slack users to connect with up to 20 different organizations within the same Slack channel.

Originally focused on internal collaboration, Slack fast became the go-to messaging platform for small businesses and startups. Slack expanded to use in enterprises, often as an alternative to an existing tool like Microsoft Teams.

Through Slack's rapid adoption and loyal user base, internal collaboration between Slack users has almost got to the point where email is no longer required. But, the long-standing issue is external collaboration.

What happens when I want to message someone outside of my organization?

What is the difference between Slack and Slack connect?

Unlike standard Slack, where you can only talk to people in your own workspace (unless you create guest accounts), Slack Connect opens up your Slack to other organizations who use their own workspace.

It's an extension of its shared channels feature.

Slack introduced shared channels in 2017. Shared channels allow two separate organizations to work together in the same channel – without leaving their workspace. So, now you don't need to revert back to email when your contact in another company also uses Slack.

Like Slack's shared channels, Slack Connect allows you to create a channel and allow another organization to collaborate with you. Both parties stay in their respective Slack workspaces and communicate without having to switch between multiple workspaces.

Slack's new feature takes the principle of a shared channel and allows you to connect to up to 20 organizations per channel.

The ability to connect to Slack users in other organizations is already a huge differentiator to its biggest rival, Microsoft Teams.

Users report the current guest experience in Teams is clunky and Microsoft has been working on different and better ways to grant external access in Teams.

At Microsoft Ignite in March 2021, Microsoft announced it's intention to introduce Teams Connect later in the year.

Few details are available as to the number of users or organizations that will be supported.

2 - Is Slack Connect different from Shared Channels?


Slack Connect extends your shared channel to up to 20 different organizations. The standard shared channel functionality only allows for one organization to become part of your channel.

Slack confirmed in a tweet that shared channels are now a part of Slack Connect.

Shared channels provide a collaboration space for you and one other organization.

Use Slack Connect when you need to bring in a third, fourth, or even twentieth organization.

3 - How do I use Slack Connect?

The new experience will be exactly like using shared channels. The interface and experience remain the same as using Slack for internal use.

The only difference? Up to 20 different organizations will be part of your shared channel.

Slack shared channels

Slack Connect pricing

To get access, you will need to subscribe to any Slack paid plan.

Users in paid plans can invite any company to a channel. In the case your external contact is not a paid Slack customer, they'll be invited to start a 90-day trial upon joining. A clear sign of Slack's plan for increasing virality and adoption.

In her article for No Jitter, Angela Ashenden, Principal Analyst at CCS Insight, points out Slack opens up a host of new possible usage scenarios. These include industry groups, communities, consortiums, holding groups of companies, and supply chain networks.

Available integrations

An important part of Slack's strategy for adoption is making as many integrations and workflows available on a cross-domain basis.

Slack points out key integrations like for external collaboration as:

  • Google Drive
  • Google Calendar
  • Zoom
  • Doodle
  • Polly
  • Box
  • Teamline
  • Adobe Creative Cloud

The integrations highlighted for external collaboration tell their own story. Rather than shoehorning file and video features in Slack to compete with Microsoft Teams, Slack is sticking to its integration roots.

Further emphasis on meetings is clear. Ilan Frank, VP of Enterprise Product at Slack, says one use case is setting up external meetings.

"Setting up an internal meeting is time-consuming enough. External meetings are even more time-intensive."

In Slack Connect, all your meeting participants are already in your channel so arranging meetings is simple. One message becomes a thread. Participants respond with their availability.

How many emails did that just save?

4 - Slack Connect DMs

In March 2021, Slack announced Slack Connect direct messages (DMs) are generally available.

This feature extends the functionality of Slack Connect, which was previously limited to channels only.

Thanks to Slack Connect DMs, you can now send direct messages to people outside your company if they also use Slack.

In order to use Slack Connect DMs, you must send an invitation to the user in another organization. They will have 14 days to accept your invitation and you can start chatting cross-company.

Following some initial unrest between Slack users who weren't expecting an invitation from another company, Slack now lets you restrict who can and can't send a DM invitation to your company.

To send an invitation to a Slack member in another organization, click the compose button in the top left-hand corner and type the email address of the person you wish to DM with.

5 - Who is using Slack Connect?

It's a safe assumption that this will be an enterprise play. The need to collaborate with 20 organizations in the same channel is an unlikely scenario for small businesses.

Slack already has 41,000 paying customers and more than one million individual Slack users using shared channels.

Customers include:

  • AirBnB
  • Time
  • Box
  • Autodesk
  • Wayfair
  • Cole Haan
  • Xero
  • Nandos
  • Fastly
  • Boldstart Ventures
  • Segment
Xero using Slack Connect

Slack CEO, Stewart Butterfield, stated the the launch video that Slack used Slack Connect to collaborate when preparing their public offering.

Joining Slack staff in their extended shared channel was bankers, lawyers, and advisors. Instead of gathering these people together in meeting after meeting, or sending email after email, the whole team communicated via Slack Connect.

You can imagine a scenario where education providers invite all their schools and universities to Slack Connect. Or healthcare providers all hosting their local hospitals and surgeries instead of emailing to and fro all day long.


Slack Connect is the first step in achieving successful intercompany collaboration.

By bringing together users in different organizations who all use Slack near removes the need for email and speeds up the collaboration process.

Projects will complete faster, customer queries will get responded to quicker, and sales cycles will become simpler.

Be sure to take advantage of Slack Connect to unlock your enterprise's external collaboration potential today.

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