Master Inbox
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Reply.io logoSends
Master InboxRoutes the reply
Cal.com logoCloses

Connect Reply.io with Cal.com

From a Reply.io reply to a booked Cal.com meeting, in one step.

Get onboarded freeFree 7-day POC. No commitment.

Master Inbox is the router in the middle

Reply.io is an AI-powered multichannel sales engagement platform, email, LinkedIn, calls, and SMS. Cal.com is the open-source, self-hostable scheduling platform teams choose for control and privacy. Between them is a rep copying a link and playing time-zone tennis while the lead cools off. Master Inbox routes it: the moment a Reply.io reply shows intent, the reply agent offers real Cal.com availability and books the meeting straight into your calendar, tied to the conversation, while the prospect is engaged.

What you can do

  • Turn an interested Reply.io reply into a booked Cal.com slot without a rep touching it
  • Offer real Cal.com availability inside the reply, no back-and-forth
  • Cut speed-to-book from hours to minutes
  • Keep every Cal.com meeting linked to the Reply.io conversation

How the Reply.io to Cal.com flow gets set up

  1. 1Connect the mailboxes behind Reply.ioBulk-import the sending mailboxes your Reply.io campaigns run on. Master Inbox reads the mailbox itself, which is how it catches forwards, out-of-office chains, and new-address replies Reply.io never surfaces.
  2. 2Link your Reply.io workspaceIn Settings, open Integrations and connect Reply.io with your API key. Campaign context now travels with each reply, so you can see which sequence started every conversation.
  3. 3Connect Cal.comLink your Cal.com scheduling so the reply agent can offer real availability inside the conversation and book the meeting while intent is high.
  4. 4Go live with white-glove onboardingOnboarding is done with you, not handed off to docs: we wire the Reply.io to Cal.com flow on your real inboxes during the free 7-day POC.
The integrations catalog inside Master Inbox, where Reply.io and Cal.com get connected
The integrations screen in the product: each tool connects from Settings, no engineering required.

Why it matters for outbound revenue teams

Every minute between a Reply.io reply and a Cal.com booking is a chance to lose the deal. Master Inbox in the middle turns "yes" into a meeting in one step.

“If it’s sub-five minutes, I honestly think we can book 100 calls a month.”
RPRoshan P., airrdigital

Reply.io + Cal.com FAQs

Can Master Inbox book Cal.com from a Reply.io reply automatically?

Yes. When a Reply.io reply shows intent, the agent offers Cal.com availability and books the meeting straight in.

Does the Cal.com booking stay tied to the conversation?

Yes. Every meeting links back to the Reply.io thread so the rep has full context going into the call.

Go deeper

Reply.io logoThe Reply.io integrationCal.com logoThe Cal.com integration

Keep reading

Glossary: Meeting booked rateGlossary: Show rateGlossary: Response SLAGlossary: What is a sequencer?Glossary: Out-of-office handling

Similar pairings

Reply.io + HubSpotReply.io + PipedriveReply.io + AttioReply.io + GoHighLevelSmartlead + Cal.comInstantly + Cal.comEmailBison + Cal.comPlusVibe + Cal.com
Free 7-day POC

See Reply.io, Master Inbox, and Cal.com working together on your real inboxes.

We wire up the whole flow and onboard your team. If the Reply.io to Cal.com handoff isn't tighter inside a week, you walk. No commitment, no credit card.

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