MailProof – Human-sounding check for AI outreach emails

Detect whether your AI-generated outreach email reads like spam before you hit send

Problem

An HN user complains about receiving many emails that appear to be from a fellow human who saw their HN comment but carry a faint whiff of AI—picking personal details to look non-spammy, sometimes sent from a real founder's address. For senders, such emails waste effort and hurt brand; for recipients, they are noise. No tool helps senders self-check for these pitfalls.

Solution

An email pre-flight tool that analyzes pasted email copy for AI tells, template feel, over-personalization risk, and spam characteristics, then returns a readability score and rewrite suggestions so outreach reads more like a human wrote it.

Users

Sales reps, founders, recruiters, and growth teams doing cold email.

MVP

Paste text or import a draft; detect common AI phrases, template patterns, and fake personalization signals; show readability and sincerity scores with rewrite suggestions; offer a browser extension for Gmail.

Revenue

Free limited monthly checks; subscription for unlimited checks and team template libraries; API billing for CRM/outreach integrations.

Why now

AI outreach is flooding inboxes and recipients are becoming immune. Senders urgently need to avoid being flagged as spam, but existing tools focus on deliverability rather than content credibility.