Triage-First, Flat-Per-Mailbox Shared Inbox

People already pay for this, but the flat-rate wedge is already occupied and cheaper, so the only honest angle is the triage feature. Evidence of Missive reports $8M ARR, 4,500+ customers and 30,000 users bootstrapped, Front's page claims 9,300+ companies, and Helpmonks claims 3,000+ customers over 15 years. Real complaints exist and are verbatim on the Jelly Show HN thread: per-seat pricing charges the same for a heavy user and a once-a-month viewer; Groove HQ went from $20 for 3 people to $45/seat for 5; an operator says 100% of security@ mail is spam and offers to pay above the top tier for approval-gated triage priced per inbox; and a commenter worries about deliverability after a verification email landed in spam. The problem is that 'cheap flat-price shared inbox' is not novel and not defensible: Jelly charges one flat $29/month for the whole team with no per-user fees, Crisp charges $45 per workspace and already lists Conversation Triage, auto-tagging, an AI Agent, an AI inbox spam filter and MCP server, and Helpmonks has sold 3 shared inboxes with unlimited users for $49/month for 15 years and sells automated AI triage as a separate add-on. Critically, the proposed $39/inbox is above all three of those existing flat prices, so this idea cannot win on price at all and must win solely on the approval-gated triage plus two-way-sync workflow. Two-way sync and deliverability are real engineering moats, but the incumbents already have them, and