Master Inbox Review

Master Inbox solves the reply-management problem that hits agencies and sales teams at scale: campaigns run across dozens of mailboxes and LinkedIn accounts, and answers scatter everywhere. It pulls LinkedIn DMs and email replies into one centralized workspace, automates reply tracking and labeling so hot leads surface immediately, and offers custom views and filters to slice the queue however your team works. Quick reply templates speed up responses, and CRM and tool integrations keep downstream systems in sync — it is designed to work alongside senders like Smartlead, Bison, and Expandi. Pricing starts at $299 per month for Growth, with Agency at $499 and Unlimited at $1,297.

Key Features

• LinkedIn DMs and emails managed in one place
• Multiple client inboxes centralized for agencies
• Automated reply tracking and labeling
• Custom views and filters per team or client
• Quick reply templates
• Integrations with CRMs and outreach tools

Who It's For

Master Inbox is aimed at sales teams and agencies already running multichannel outreach through tools like Smartlead, Bison, or Expandi who are losing leads in scattered inboxes. The economics make sense at volume: when replies number in the hundreds per week across many clients, faster and more organized response handling directly converts to closed deals. Solo senders with a couple of inboxes will not need this layer; teams managing many will feel the difference quickly.