Can you join multiple Slack workspaces? Yes, and here is how it works

Yes, you can join multiple Slack workspaces, and there is no published cap on how many. Slack's own help page on joining says it directly: you can use the same email address to join as many workspaces as you like, but you will have a separate Slack account for each one. That second half of the sentence is the part that shapes everything else. Each workspace keeps its own profile, notification settings, history and billing, while the desktop app, the Dock icon and the macOS notification permission stay shared. This guide covers how to join and switch, what stays separate, when a workspace is the wrong tool and a guest seat or a shared channel fits better, and how to keep several workspaces from turning one Mac into a stream of interruptions. Every number below was checked against Slack's own pages on October 18, 2026.

How joining a second workspace actually works

There are two routes in, and both end with a new account tied to the same email address.

Accepting an invitation

Most people arrive through an invitation email. According to Slack's guide to joining a workspace, the desktop flow is short:

1. Open the invitation email from Slack.
2. Click Join now.
3. Enter a full name and click Continue.

The name entered here belongs to this workspace only. It does not change the name used anywhere else.

Signing in with an email address

If a workspace allows people with a certain email domain to join, or an invitation is already waiting, the sign-in page works too:

1. Visit slack.com/signin on the desktop.
2. Enter an email address and click Continue.
3. Enter the confirmation code Slack sends to that inbox.
4. Under Accept an invitation, click Join next to the workspace.

Slack suggests using a work email address for this. In practice the choice matters because the confirmation code goes to that inbox every time a new device signs in. A client workspace joined with a personal address means the code arrives in the personal inbox, which is easy to miss during the working day.

Adding a workspace inside the desktop app

Once one workspace is open, Slack's sign-in guide describes adding more from inside the app: click the workspace icon in the sidebar, choose Add a workspace, then choose the option to sign in to another workspace. The new workspace then appears in the same list as the others.

What stays separate and what is shared

Because each workspace creates its own account, the split follows a clear line. Anything that lives inside Slack's account record is per workspace. Anything that lives in macOS is shared.

Item	Per workspace	Shared across all
Display name, photo, title	Yes
Status and its expiry	Yes
Notification preferences and Do Not Disturb hours	Yes
Channels, sidebar sections, saved items	Yes
Installed apps and their permissions	Yes
Message history limits (set by each workspace's plan)	Yes
The desktop application and its theme		Yes
macOS notification permission		Yes
The Dock icon and its badge		Yes
The entry in Command Tab		Yes

The table explains a common surprise. Turning on Do Not Disturb in one workspace leaves the others ringing. Muting Slack in macOS notification settings silences every workspace at once. Neither is wrong, but it means quiet hours have to be set in each workspace separately if only some of them should go quiet.

History is the other surprise. The free plan keeps 90 days of message and file history visible, according to the Slack pricing page, and Slack's plan comparison adds that free workspaces delete messages and files older than one year. When a client runs a free workspace and a staff job runs a paid one, search in the client workspace will come back empty for anything older than three months. That is the plan, not a missing file.

Switching between workspaces on a Mac

Slack documents switching in its own help article. On the desktop, click the workspace icon at the top left to see every workspace currently signed in, then choose one.

The more useful detail is the tip at the bottom of that page. Clicking the workspace switcher icon, or pressing Command + Shift + S on a Mac, keeps all workspaces visible in the sidebar instead of hidden behind a menu. With the list visible, each workspace can be dragged into a new order.

Order matters more than it looks. The keyboard shortcuts that jump to a workspace by number follow the visual order of that list. Leaving the order as the sequence in which invitations arrived means the most used workspace might sit in position four. Dragging the two workspaces that carry daily work to the top costs ten seconds once and saves a mental lookup every time after.

On a phone, the same list sits behind a swipe right from the Home tab.

Search is the part of switching that catches people out. Slack search runs inside the workspace that is open. Memory tends to keep the message and lose the workspace it was in, so the first search often fails and looks like the message has gone. A faster habit is to recall who sent it, open the workspace where that person is a member, and search there.

When a new workspace is the wrong answer

Joining another workspace is the default because it needs nothing but an invitation. It is not always the right structure, and Slack offers two others that keep the switcher list shorter.

Guest accounts

A guest is someone added to a workspace with limited access. Slack's page on guest roles lists the rules:

• Guests are available only on paid subscriptions.
• Multi-channel guests can see only the channels they are added to and are billed as regular members.
• Single-channel guests are free and can see one channel. A workspace can add up to five single-channel guests for every paid active member, so ten members allow up to 50 such guests.
• Owners and admins can set guests to deactivate automatically on a set date, with a reminder five days before.

For a contractor who works with one team on one project, a single-channel guest seat avoids adding a whole workspace to their switcher.

Slack Connect

When both sides already use Slack, Slack Connect lets them share a channel while each stays in their own workspace. A single channel can host up to 250 organizations, and each organization must be on a paid subscription to work in channels together. The shared channel appears in each side's normal sidebar, so the external relationship adds a channel, not a workspace.

Choosing between the three

Situation	Better fit	Why
Long-term member of an unrelated team	Join the workspace	Full access, own profile and settings
Short project inside one channel	Single-channel guest	Free seat, ends on a set date
Two companies that both use paid Slack	Slack Connect channel	No new workspace for either side

A consultant with eight clients can end up with eight workspaces or with one workspace and eight shared channels. The second arrangement is only possible when the clients are on paid plans, but it is worth asking for before accepting another invitation.

Notifications break first

The point at which several workspaces start to hurt is rarely the switching itself. It is the notifications.

Every workspace sends its alerts through the same application, which means the same banner style, the same sound and the same Dock badge. A badge reading 7 could be one urgent message in a client workspace or seven reactions in a hobby community. Finding out requires opening Slack, which is the interruption the badge was supposed to filter.

Three settings reduce the noise:

• Per-workspace notification level. In each workspace, set notifications to direct messages and mentions only, then add keywords that matter. This is per workspace, so it has to be repeated in each one.
• Per-workspace Do Not Disturb schedule. Quiet hours live in each workspace. A community workspace can go silent after six in the evening while the staff workspace stays on.
• Leaving workspaces that no longer earn their place. Signing out of a workspace that is no longer used removes its alerts from the shared badge. The membership itself is not deleted by signing out.

The shared macOS permission is the blunt tool. It is useful for a focused hour, but it silences every workspace together.

Running Slack outside the desktop app

Some people keep the Slack desktop app for one workspace and open others in a browser. This works, and it separates the badges, because the browser tab is a different application from the desktop app. The trade is that browser tabs lose native notifications unless the browser has notification permission, and a tab is easy to close by accident.

Another route is a browser built around web apps rather than pages. An app aggregation browser places each web app in its own panel in a sidebar, with its own sign-in kept apart from the others. For Slack, that means each workspace can sit next to the mail, calendar and documents for the same client, so switching clients moves all of them at once instead of Slack alone. One such tool for macOS, built by the publisher of this site, keeps a free plan of one workspace and three apps. Its paid plan, which adds unlimited workspaces and multiple accounts per service, is listed at $7 a month, $60 a year, or $129 as a one-time licence. Grouping apps by client is explained on the Workspaces page, and the full list of what each tier includes is on Pricing.

None of this is required to use several Slack workspaces. The desktop app handles membership and switching on its own. A separate tool helps only when the problem is that the rest of a client's tools live somewhere else.

A quick test tells the two problems apart. Count how many times in an hour Slack is opened only to find out which workspace a badge belongs to. If that number is high, the fix is notification settings inside Slack. If the count is low but every client switch also means hunting for the right mail account and the right document tab, the fix is grouping apps by client, which Slack alone cannot do because it only manages its own windows.

A setup that holds up past four workspaces

A short routine keeps several workspaces manageable:

1. List every workspace currently signed in and mark each as daily, weekly or dormant.
2. Sign out of the dormant ones. They can be rejoined later with the same email.
3. Press Command + Shift + S to keep the list visible, then drag the daily workspaces to the top.
4. In each daily workspace, set notifications to direct messages and mentions, and add a Do Not Disturb schedule.
5. For any new client who already uses paid Slack, ask for a Slack Connect channel before accepting a workspace invitation.

What to change first

Start with the order of the workspace list and the per-workspace notification level, because both take minutes and change every hour after. If the friction comes from having each client's mail and documents scattered away from their Slack, see how SpaceDeck groups those apps together.