Sinceerly is an AI tool to 'un-AI' your writing

Sinceerly launched as a Chrome extension for Gmail that rewrites emails to sound more natural and less obviously AI-generated.

It offers free and paid AI-assisted modes like subtle, human, and CEO, each designed to remove AI cues and add more human-like imperfections.

The product reflects growing demand for tools that “de-AI” writing as users push back against overly polished machine-generated text.

Backers and partners include Ben Horwitz, Dorm Room Fund, Hachette, and Shy Girl.