If you're running cold email at scale, Smartlead is the engine. Inbox rotation, warm-up, AI categorization, and deliverability that holds up under volume.
Master Inbox takes everything that happens after the reply and turns it into a revenue system. Advanced threading, deal stages, bi-directional label sync, multi-client workspaces, and automatic CRM updates layer on top of what Smartlead already has.
Smartlead generates replies from prospects.
Master Inbox makes sure every single reply gets acted on.
People have seen real results since connecting Smartlead with Master Inbox. These stories show what changes when you combine advanced filters, views, workflows, reply agents and much more into on inbox
Our cold email process used to be messy. Responses were forwarded around and often hard to track. With MasterInbox, we have completely streamlined it. The Slack integration has also been a huge win, giving us instant lead notifications and improving our reporting.
Alex, Freedom For Founders.com
Running outbound campaigns on LinkedIn and email was a huge pain, and the LinkedIn inbox itself is too unreliable for keeping track of conversations. Master Inbox allows us to bring replies together and be much more nimble as an agency. We've basically onboarded more clients!
Tyler, AMPLIS
FAQs
Have a question? We’re here to help.
Yes. Smartlead caps views by plan. Master Inbox gives unlimited custom views on all plans.
Absolutely. Master Inbox supports multi-client and multi-workspace setups, making it ideal for agencies running Smartlead campaigns at scale.
Smartlead integrates with Master Inbox via secure API sync, allowing replies, labels, prospects, and campaign data to flow into a single unified inbox with full control over exclusions and automation.
Yes. Smartlead threads by subject line and loses context. Master Inbox threads by prospect and see every campaign conversation in one unified view.
Yes. You can enable bidirectional label sync so labels applied on either platform stay perfectly aligned.
Yes. Smartlead's CRM sync lags. Master Inbox pushes replies to HubSpot/Piepdrive automatically in real-time.
Yes. High-intent replies are automatically prioritized and can trigger Slack alerts or assignments.
Agencies using Master Inbox avoid lost leads, respond faster, and close more deals, one client credited us with helping close $260k+ in revenue by capturing replies they’d otherwise miss.
Yes. Master Inbox creates master threads, showing the full prospect journey across campaigns and subject lines in one view.
Master Inbox adds advanced filtering, master threads, automation, collaboration, and cross-client visibility that go beyond a single-campaign inbox.
Master Inbox syncs replies directly from mailboxes and brings in all conversations, not just campaign ones. This ensures every forwarded reply comes through, the ones most sequencers miss, Master Inbox catches them all.
Still have questions?
Can’t find the answer you’re looking for? Please get in touch.
