Missive is a collaborative inbox where teams draft together. MCPmailer is an inbox an agent owns, with a person supervising it.
Support inboxes · Missive claims checked July 2026
Missive treats email, chat, and social as shared conversations a team works inside, with collaborative drafting and internal discussion attached to the thread. Pricing starts around fourteen dollars per user a month, and its AI features come with the plan rather than metered per resolution.
If several people co-own a mailbox and the value is in them working the same thread together, Missive is unusually good at that and nothing here replaces it. Its plan-included AI is also a friendlier pricing model than per-resolution metering.
Collaborative drafting assumes humans write and AI assists. We assume the agent writes and a human supervises, which changes the primitives: tools instead of a UI, an identity per agent instead of a shared address, and usage pricing instead of seats.
Missive's core loop is people composing together with AI help. Ours is an agent composing autonomously with structured refusals when it should not send, and a human who can read the thread afterwards or take it over mid-conversation.
Per-user pricing is reasonable for a team of eight. Twenty narrow agents priced as twenty users is not, when between them they might send what one person sends.
Shared conversations are the point in Missive. Here each agent has its own address, key, and history, so revoking or auditing one agent never touches another.
Every row is a claim we could defend with their documentation open beside it. Where they are ahead, the row says so.
A team inbox and an agent inbox solve different halves of the same word.
Keep the team inbox
For the mail people genuinely handle together.
Give the agent its own address
So its sends are unambiguous and separately revocable.
Escalate by mail
The agent loops your Missive address in when a person should decide.
Its own AI features work inside it, and the API can automate parts of the workflow. What you cannot get is an agent with its own address and key that any MCP client can drive.
This one, and not marginally: seat pricing counts each agent as a user, while metered mail counts what they send.
No. A human can take over a thread and reply as themselves, but there is no co-composing surface.
Yes. It forwards the thread, and the whole history stays readable in the dashboard for whoever picks it up.
Keep the help desk as your system of record. Give the agent its own address for the lane it can genuinely handle, and let it escalate into the desk when it cannot.
The free tier is 3,000 emails a month across three agent inboxes, no card, with receiving, threading, and search included. Enough to watch a real conversation happen before you decide.
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