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Speed up collaboration with external partners

Collaborating in channels allows you to work as efficiently with agencies, vendors, or clients as you do internally. With multiple companies working together, you each have your own unique set of tools you need to get work done. Connecting your tools with Slack takes information out of siloed tabs and into a channel—where all the right people can stay aligned.

Apps like Zoom, Doodle, and more take cross-company collaboration to the next level.

Join a Zoom meeting

Using Zoom in a shared channel allows you to jump on a call or run weekly check-ins by using the /zoom slash command. After the meeting, send a transcript to the channel and track follow-ups for both sides.

With Zoom, you and your partners can:

  • Start or join a meeting
  • Share meeting recording links


Easily start a Zoom video meeting directly from Slack.

Find a meeting time that works for everyone

Instead of coordinating meeting times through back and forth emails, quickly find a time that works for everyone in a channel. Suggest meeting times and both sides can vote for times that work best for them.

With Doodle, you and your partners can:

  • Suggest meeting times
  • Share a poll in channel
  • Vote and agree on a time

Doodle Bot

Find the best time to meet with your team inside and outside Slack in the easiest way possible.

Grant access to Google Drive files

Add context to a conversation by quickly sharing files in a channel or DM. Rather than emailing back and forth to request permission to a file, grant instant access in Slack, so both teams can start collaborating immediately.

With Google Drive, you can:

  • Share and grant instant access to files
  • Reply directly to comments using threads
  • Create and import new files

Google Drive

Quick access to your files from all your devices.

Automatically send calendar event reminders into channels

Google Calendar for Team Events brings events into a channel so key dates don’t fall through the cracks. Get reminders about events, upcoming meetings, or milestones to keep the team on track.

With Google Calendar for Team Events, you and your partners can:

  • Post reminders before an event starts
  • Post summaries of the current day's and week's events
  • Post updates when an event is changed

Google Calendar for Team Events

A shared calendar for your team.

Send emails to a channel

Bring emails out of siloed inboxes and into a channel where everyone working on a project can get up to speed. With the Email app, you can pipe important emails into a channel, like weekly reports or relevant email chains.

With the Email app, you and your partners can:

  • Create a custom email address for your channel
  • Automatically forward emails into a channel for the team to triage


Send emails into Slack to discuss them with your teammates.

More apps to use for external collaboration

  • Box File Picker
    Securely store, share, and manage all your files
    Get App

Visit our Help Center to learn more about using apps for external collaboration.