Category
Sales Engagement
Key features
Unified email and LinkedIn inbox
AI reply labeling
Reply agents for follow up and booking
01 — Overview
What is
Master Inbox
Master Inbox pulls replies from cold email sequencers and LinkedIn tools into one inbox, including forwards, CCs and new address replies that sequencers often miss. AI labels tag the intent of every reply, views and filters show what needs a response, and reply agents can answer, follow up and book meetings. Outbound teams and agencies use workflows, Slack alerts, CRM sync and per client workspaces to make sure every reply is worked and reported.
02 — Who it’s for
Ideal Customer Profile
Built for lead generation agencies, outbound sales teams and RevOps teams running high volume email and LinkedIn campaigns across many senders or clients.
03 — Capabilities
Key Features
Unified email and LinkedIn inbox
AI reply labeling
Reply agents for follow up and booking
Client workspaces with permissions
CRM sync and workflows
API with 150+ endpoints and webhooks
05 — Similar tools
Alternatives
06 — FAQ
Frequently Asked Questions
What is Master Inbox used for?
Master Inbox is used to manage every reply from cold email and LinkedIn outreach in one place, with AI intent labels, SLAs and automated follow up so no lead is missed.
Which sending tools does Master Inbox work with?
It unifies replies from sequencers such as Smartlead, Instantly and EmailBison and from HeyReach for LinkedIn, with more sources like SuperSend and GetSales listed.
Which CRMs and tools does Master Inbox integrate with?
Integrations include HubSpot, Pipedrive, Attio, Close, GoHighLevel, Salesforce through webhooks and OutboundSync, calendars like Calendly, Cal.com and Chili Piper, enrichment tools like Clay and Apollo, plus Slack, Zapier and n8n.
Does Master Inbox have an API?
Yes. Master Inbox offers an API with 150+ endpoints and webhooks for events across the product.