This 'anti-Grammarly' AI tool adds typos to your emails on purpose
By María José Gutierrez Chavez
Published on April 25, 2026.
Ben Horwitz, an investment partner at venture capital firm Dorm Room Fund and student at Harvard Business School, has created an AI tool called Sinceerly that makes slop emails sound more human. The tool rewrithes a long AI paragraph and condenses it into three levels: subtle, human, or CEO. The creator believes that if AI can't handle our own writing, it could be used to un-evastiate our own errors. Sinceerously is available as a browser extension and is on the market for free.
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