Missive is a great team inbox. Master Inbox is the outbound reply inbox.
Missive brings email, SMS, WhatsApp, Messenger, Instagram and live chat into one collaborative inbox, with assignments, internal comments and shared drafts. Outbound reply handling is a different job: hundreds of sending mailboxes, LinkedIn in the mix and a team that grows with volume. That is what Master Inbox is built for.
Free 7-day POC. Unlimited users on every plan. Missive stays your shared inbox.
What is Missive, really?
A collaborative inbox for teams that share customer-facing mailboxes. Three things to know when you compare it with an outbound reply inbox.
Assignments, internal comments, shared drafts, tasks and an audit trail, in desktop, web and mobile apps, plus an AI assistant, rules, a REST API, webhooks and an MCP server.
Starter is $14, Productive $24 and Business $36 per user per month on yearly billing, or $18, $30 and $45 monthly, per Missive's billing docs checked 28 October 2026.
Missive's own pages describe a general inbox for support, sales and operations teams. It lists 36 integrations across 9 categories, including HubSpot, Salesforce, Pipedrive and Zapier.
If a small team shares a company inbox and wants chat around every email, Missive does that well. Master Inbox handles the replies your campaigns generate.
Missive and Master Inbox side by side
What each one is built for. The Missive column is what its own pages describe, checked 28 October 2026. The Master Inbox column is what ships today.
| Missive | Master Inbox | |
|---|---|---|
| Built for | Teams sharing customer-facing mailboxes | Outbound sales teams and agencies working campaign replies |
| Channels | Email, SMS, WhatsApp, Messenger, Instagram and live chat | Email and LinkedIn replies from your sequencers, plus inbound forms |
| Replies it works on | Conversations in connected Gmail, Microsoft and IMAP accounts | Every reply in every connected mailbox, including forwards, CC replies and new addresses |
| AI | AI assistant that drafts replies for approval | AI intent labels on every reply, plus reply agents that answer and book meetings |
| Pricing model | Per user per month, $14 to $36 yearly or $18 to $45 monthly | Mailboxes and client workspaces, unlimited users, free 7-day POC |
| Integrations | 36 listings across 9 categories; Slack and LinkedIn not listed (checked 28 Oct 2026) | Sequencers, LinkedIn tools, CRMs, booking tools and Slack across 58 integration pages |
| Client access | Shared accounts and team inboxes | A workspace per client with scoped client logins and reporting without a login |
Missive for the company inbox. Master Inbox for outbound.
Some teams keep Missive for shared company email and run Master Inbox for outbound replies. Three steps on the first call.
Connect your sequencers
Smartlead, Instantly, EmailBison, HeyReach and the mailboxes behind them, by API key or OAuth.
Label and route
AI labels every reply by intent. Interested replies reach the right rep with a draft, in Slack or the inbox.
Keep each inbox for its job
Company email stays in Missive. Outbound replies, labels and meetings live in Master Inbox, synced to your CRM.
Missive is excellent for team email. Master Inbox is excellent for outbound replies. Use each for its job.
Compared against Missive's public pages, last checked 28 October 2026. Missive is a trademark of its owner; Master Inbox is an independent product and is not affiliated with Missive. Read the long comparison: Master Inbox vs Missive.
Explore more: Missive alternative, Missive pricing, Missive alternatives, The better unibox
Questions we get
Is Master Inbox a replacement for Missive?
How is Missive priced?
Does Missive connect to LinkedIn or Slack?
Can I keep Missive and add Master Inbox?
What does Master Inbox cost?
See it on your own inboxes
Book a demo. We connect your sequencers live and show every outbound reply, labeled, in one queue.
Start your free 7-day POC