The $14k/mo tool that left the front door open

InboxPilot is a sample teardown to show the format. You paste a prospect's website and it writes you a personalised cold email in seconds. One founder, around $14k a month, grown almost entirely off the founder's Twitter audience.

The build is easy, a thin wrapper over a model with a clean interface. The interesting part is where they are not: they live in a web app, while the work happens inside the inbox.