What is app.slack.com in analytics? Slack in a web browser

What it is

app.slack.com is the address of Slack's web app. When Slack is used in a browser, the workspace loads under https://app.slack.com/client/...

Why there's no full URL

Slack's web app tells the browser to share only its origin with other sites, so the channel or message URL stays private.

What traffic it represents

Someone clicked a link to your site in Slack while using Slack in a web browser.

Sources

Once the page loads, the URL will be in the following format: https://app.slack.com/client/TXXXXXXX/CXXXXXXX.
Locate your Slack URL or ID - Slack Help

<meta name="referrer" content="origin-when-cross-origin">
Slack web app (page source, checked 2026-10-06)

Send only the origin for cross-origin requests and requests to less secure destinations (HTTPS→HTTP).
Referrer-Policy header - MDN

Related referrers

android-app://com.Slack Slack app on Android
android-app://org.telegram.messenger Telegram app on Android
android-app://com.microsoft.teams Microsoft Teams app on Android
android-app://com.whatsapp WhatsApp app on Android
statics.teams.cdn.office.net Microsoft Teams link check

All referrers explained

Referrers, grouped by how people arrived

Vireo Analytics groups your referrers by how people arrived, counts AI assistants as their own source, and joins Search Console so you see the searches behind each post. Free on WordPress.org.

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