Missive

Missive is a shared-inbox and team collaboration app that layers internal discussion, task assignment, and shared team spaces on top of email (plus text and other channels) so teams always know who's handling what. It's built for small-to-midsize teams in customer-facing operations — support, sales, real estate, e-commerce, accounting, and professional services — that outgrow forwarding and CC'ing. What most sets it apart is that internal comments, tasks, tags, and statuses live directly inside the emails themselves, and its AI assistant pulls real context from connected tools like Stripe or a CRM via MCP rather than acting as a generic sidebar.