Sends
Routes the reply
ClosesConnect Instantly with Slack
Every Instantly reply, pushed to Slack the instant it lands.
Master Inbox is the router in the middle
Instantly sends high-volume cold email with built-in deliverability and a lead database. Slack is where your team already lives all day. A hot Instantly reply is worthless if nobody sees it in time. Master Inbox sits between them: the second a reply lands and gets tagged, it fires Slack with the prospect, the preview, and the thread, on the first reply and every follow-up, so nothing rots in an untracked folder.
What you can do
- Fire Slack the instant an Instantly reply is tagged interested
- Include the prospect, message preview, and thread link every time
- Alert on every Instantly reply, not just the first
- Keep the whole team in the loop without living in Instantly
How the Instantly to Slack flow gets set up
- 1Connect the mailboxes behind InstantlyBulk-import the sending mailboxes your Instantly campaigns run on. Master Inbox reads the mailbox itself, which is how it catches forwards, out-of-office chains, and new-address replies Instantly never surfaces.
- 2Link your Instantly workspaceIn Settings, open Integrations and connect Instantly with your API key. Campaign context now travels with each reply, so you can see which sequence started every conversation.
- 3Install the Slack reply botConnect Slack and pick a channel. Tagged replies arrive with the prospect, preview, and thread link, and your team can answer without leaving Slack.
- 4Go live with white-glove onboardingOnboarding is done with you, not handed off to docs: we wire the Instantly to Slack flow on your real inboxes during the free 7-day POC.
Why it matters for outbound revenue teams
The moment a lead replies in Instantly, speed decides whether you win it. Master Inbox to Slack makes sure the right person is pinged and the right workflow fires, every time.
“We have automations that go to Slack, but not the reply. We still have to jump in.”
Instantly + Slack FAQs
What triggers Slack from Instantly?
Any Instantly reply, or a label like "interested," fires Slack with the prospect and thread details attached.
Do I get alerted on follow-up replies too?
Yes. Slack fires on the first Instantly reply and every follow-up after it.
Can one inbox manager work replies across all our Instantly accounts?
Yes. Teams consolidate 50 or more Instantly accounts into one queue with shared labels, snooze, and follow-ups, instead of logging in account by account.
If reps work replies here, does our CRM still get the full picture?
Yes. Contacts, threads, and stages sync to your CRM automatically while reps answer from one inbox, so leadership dashboards do not change.
Can reps reply from Slack without opening the app?
Yes. The Slack reply bot posts the reply with an AI draft, and reps can edit and send from the thread.
Can notifications route per client or per founder?
Yes. Each workspace can post to its own channel, and label-based routing pings only the person who owns that kind of reply.
Will warm-up emails create false "interested" pings?
No. Warm-up tags sync from your sequencer and are excluded, so the channel only fires on real prospect replies.
Go deeper
Keep reading
Similar pairings
See Instantly, Master Inbox, and Slack working together on your real inboxes.
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