Harvard Student Launches Anti Grammarly Extension That Makes Emails Messy on Purpose

It intentionally injects mistakes to sound more human

A Harvard Business School student has launched Sinceerly, an “anti-Grammarly” Chrome extension that deliberately introduces small errors into emails. Ben Horwitz says the goal is to counter the overly polished, AI-like tone many writing tools create, pushing messages to feel more human. The move flips the usual productivity script, raising fresh questions about authenticity and automated messaging.