Slack Integration

Make Phone Calls from Slack
Browser-based Calling for Teams

Place the call from your browser in seconds. Nothing to install, and outbound calls need no phone number.

Product facts

  • Outbound: No dedicated number required.
  • Inbound: Requires US/Canada digital number ($2.14 to $5/month).
  • No apps: Works in Chrome, Safari, Edge, Firefox.
How it Works
Slack Click-to-callConnected
💬

Setup Guide - Slack Integration

Get up and running in minutes. No desktop apps required.

1

Install the App

Add StartACall to your Slack workspace from the Slack App Directory or from your StartACall dashboard. Grant the required permissions so the app can post and add actions.

2

Connect Your Account

Sign in to StartACall in your browser and connect the Slack workspace. This allows click-to-call buttons to appear next to phone numbers in messages.

3

Start Calling

Use the /call slash command or click a call icon next to a phone number. The call opens in your browser and connects to the other side over the public phone network.

What you get

Call from any Slack message, channel or DM. Calls open in the browser so users do not need to install software, and call summaries are posted back to Slack for easy tracking.

Click to Call
Click a phone number in Slack to call
Slash Command
Use /call +12223334444 to dial from Slack

Integration Features

Everything your team needs to run calls from Slack and monitor results in real time.

  • Click-to-call directly from messages and channels
  • Slash commands to dial any phone number from Slack
  • Automatic call logs and summaries posted back to Slack
  • Real-time analytics and session links for post-call review
  • for live transcription and suggested responses
  • Use to handle inbound or outbound calls autonomously

Instant Setup

Install and start calling in minutes with no client installs for users.

Global Reach

Dial real phone numbers worldwide directly from Slack.

Secure

Encrypted connections and enterprise controls for call privacy.

Call Logging

Automatic post-call summaries in the channel or DM you choose.

Security and Compliance

Enterprise controls so admins can manage access, retention, and privacy.

Permissions

Admin-granted scopes limit what the app can post and where it can appear.

Encryption

WebRTC media is encrypted end to end between browser and StartACall infrastructure.

Admin Controls

Enable or disable call posting, choose which channels receive logs, and set retention policies.

Frequently Asked Questions

How do I install StartACall in Slack?

Install the StartACall app from the Slack App Directory or connect via your StartACall dashboard and follow the prompts to grant permissions.

Do users need to install software?

No. Calls run in the browser. Users only need a modern browser and microphone permission to make and receive calls.

Can calls be recorded and transcribed?

Yes. With permissions enabled, StartACall provides transcription and recording options that can be stored per your retention settings.

Will call logs appear in Slack?

Yes. After a call, StartACall can post a summary and a link to the call recording or transcript in a channel or DM for tracking and follow up.

Add StartACall to Slack

Start placing browser-based calls from Slack today. No app installs for users. Register your team and connect Slack in minutes.

Calling Alongside Slack: Place Real Phone Calls From Your Browser

In short

StartACall lets your team place real phone calls straight from a browser tab next to Slack, with no app to install and no SIM card. You can dial any client or lead in Chrome, Safari, Edge or Firefox, pay per minute with no phone number required for outbound, and add a US or Canada number for between $2.14 and $5 a month if you also want to receive calls.

Why teams pair browser calling with Slack

Slack keeps conversations and files in one place, but it does not let you ring an external phone number that is not also a Slack user. When a customer drops a number in a channel, or a lead replies that they would rather talk, you usually have to grab a personal phone or open yet another tool. StartACall closes that gap by running in a separate browser tab, so you can copy a number out of Slack and dial it in seconds.

Because StartACall is browser based, every teammate uses the same setup whether they are on a Mac, a Windows laptop or a Chromebook. There is nothing to download, no SIM card, and no shared desk phone, which makes it easy to keep calling consistent across a remote team that already lives in Slack.

How outbound calling works

Outbound calls on StartACall need no phone number of your own and are pay as you go, billed per minute. You open the browser, dial the international or local number you copied from a Slack thread, and talk. There are no monthly seats required just to make calls, so a member who only dials occasionally costs nothing when idle.

Calls are end to end encrypted, which matters when a channel carries client details, deal terms or anything you would not want intercepted. The combination of per minute pricing and strong encryption makes it well suited to international calling and privacy sensitive business conversations.

Receiving calls and callbacks

If you want customers to call you back on a stable line, add a US or Canada digital number at a flat monthly price between $2.14 and $5. You can post that number in a Slack channel or your signature, and inbound calls ring through the same browser interface your team already uses for outbound dialing.

Frequently asked questions

Does StartACall connect directly to the Slack app?+

No. StartACall is a separate browser based calling service, not a Slack plugin. You use it in its own tab next to Slack and dial numbers you copy from your channels or direct messages. There is no integration to install or configure.

Can I call someone who is not on Slack?+

Yes. StartACall places real phone calls to any regular phone number, so you can reach clients, leads or vendors who have never used Slack. Outbound calls need no phone number of your own and are billed per minute.

What do I need to start calling?+

Just a browser. StartACall works in Chrome, Safari, Edge and Firefox with no app download and no SIM card. Open the page, dial the number, and pay only for the minutes you use.

How can my team receive calls back?+

Add a US or Canada digital number for a monthly fee between $2.14 and $5. Inbound calls to that number ring in the same browser interface, and you can share the number in Slack so customers know where to reach you.

Last reviewed June 2026Reviewed by the StartACall calling teamDialing rules cross checked against ITU international dialing procedures
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