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Every reply. Every client. One place

Helping Lead Gen Agencies Never Miss a Client Reply

Your current tools are sending at scale but they’re missing replies.
Master Inbox catches what they don’t, so you never lose a lead again.
See how Master Inbox helps GTM & Revops teams manage Linkedin + Email inboxes in one clean view

Managing Linkedin DMs + Email inboxes is chaotic.Replies Get Missed. Clients Get Pissed.

Your team wastes hours jumping between accounts, chasing replies, and updating sheets. Master Inbox centralizes every campaign response so you stay organized, responsive, and in control.

The fastest growing agencies rely
on Master Inbox everyday

Organize and manage

Stay in control, no matter how many Inboxes you handle

Build a clear structure for your inboxes and workflows. From unlimited client inboxes to labels, filters, and shared workspaces you’ll always know where everything belongs.

Scale effortlessly with unlimited client inboxes synced in real-time.

Manage 1k or 100k mailboxes across any sequencer. Use SmartLead, Bison, Instantly, HeyReach, Expandi or Aimfox, we support them all in one Master Inbox.

All replies, all client workspaces, campaigns or forwarded replies, in one inbox.

Get a clean, real-time view of every response no matter which platform or sender it came from.

Views and Filters

Create custom view and add filters to support internal operations and workflows, from follow ups, to reply handling to support. Automatically exclude warm up and unwanted emails.

Workspaces

Add unlimited clients, create unlimited master inboxes for each of them! Assign channels across Email or Linkedin and provide a custom experience using our member permissions for client and team access!

Labelling

Track replies, response times, lead progress, and export insights for client check-ins anytime.
Communicate and perform

Work smarter, reply faster, deliver better

Keep conversations flowing and clients happy. Whether it’s smart lead management, quick replies, LinkedIn + Email outreach, client-ready reports, or reminders you’ll always stay one step ahead.

Create deal stages. Custom lists & pipeline views.

Allow client workspaces to manage their own custom lists for better deal and sales cycle management .

Reminders and Snooze

Set reminders, get a notification on slack when you need to act, see them popup right back into your inbox at the right time and place!

Quick Replies

Reply templates combined with keyboard shortcuts allow you to reply faster and on brand every single time.
More features

And much more..

Keep conversations flowing and clients happy. Whether it’s smart lead management, quick replies, LinkedIn + email outreach, client-ready reports, or reminders you’ll always stay one step ahead.
Merge threads
Archive replies
Universal message search
Inbound prospect routing
Send message API
Custom views
Custom Inboxes
Notifications
Integrations
Unlimited Channels
Follow ups
Add notes for prospects
Auto Store Attachments
AI Labeling
AI Reply Agents
Linkedin DMs
Multiple Inboxes
Client Workspaces
Warm up tag handling
Custom webhooks
Slack notifications
Custom labels
Custom lists
Reminders for Linkedin DMs
DM & Email Tagging

One Inbox. Every channel. Zero missed leads.

From Gmail, Outlook, LinkedIn DMs, native or through Expandi and HeyReach and custom SMTPs, Master Inbox gives your GTM and Rev Ops team a single, powerful view of every reply.

Threads that actually help you convert

We auto-thread conversations across tools, so your team always sees the full picture. Follow-ups stay on track and your team stops guessing who replied last.

Your workflow is missing reply management.

Your workflow has infrastructure, verification and prospecting, sending and even CRM tools, but the most critical is reply and follow up management where real revenue is created.
Smartlead
Premium Inboxes
Zapmail
HeyReach
Instantly
EmailBison
Scaledmail
Salesforge
Smartlead
Premium Inboxes
Aimfox
Clay
Aerosend
Lunatro mx
Slack
Every reply. Every client. One place

What is a missed reply worth?

Your current tools are sending at scale but they’re missing replies.
Master Inbox catches what they don’t, so you never lose a lead again.
Sprout
In House GTM Teams

$149

/ month
What’s included:
500 Mailboxes
Unlimited labels
Unlimited views
Reminders
VIP support
1 Workspaces
Sign up
Growth
Budding Agencies

$239

/ month
Everything in Sprout +
1000 Mailboxes
10 Workspaces
Warm up auto sync
AI Labeling
Sign up
Agency
Established Agencies 

$379

/ month
Everything in Growth +
2500 Mailboxes
30 Workspaces
Hey Reach Integration
Expandi Integration
Aimfox Integration
AI Reply agents*
Sign up
Unlimited 30k
LIMITED TIME ONLY

$

997

/ month*
Add ons Included:
Everything in Agency +
Hubspot integration
API Access
Unlimited Webhooks
Contact us

FAQs

Have a question? We’re here to help.

Sequencers often miss replies or lose thread context. Master Inbox consolidates every reply email + LinkedIn into a single “Master Thread,” so no deal opportunity slips away.

With AI auto-labeling (Lead, Demo, Objection, Interested etc) and reminders, reps instantly see priority replies, improving speed to lead and conversion rates.

Master Inbox is the only solution that gives you master threads which is a complete context window on a prospects conversation journey with you across multiple campaigns and subjects lines, it all lives in one view!

You can run campaigns on SmartLead or Bison, Instantly or Luella, Heyreach, Expandi or Aimfox, all replies show up in one centralized master inbox for your clients! Manage multiple clients using workspaces, control access using member controls and show only positive replies, or route specific ones to clients mailbox of choice!

Master Inbox pushes replies, thread context, and labels into HubSpot using our integration, we support a deeper attribution based integration through our partnership with OutboundSync, which also supports Salesforce!

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.

Still have questions?

Can’t find the answer you’re looking for? Please get in touch.
Contact us

Unify replies. Scale your agency. Close more deals.

Master Inbox helps agencies handle high volumes of replies without dropping the ball.
 The inbox built for outbound at scale.
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