A new AI start-up out of Harvard is pitching the idea of adding typos and grammar mistakes in emails to make them look human-written. The name of the company is “Sinceerly.”

It used to be that having a professional and polished email was a sign of competence. Now, however, in the age of AI, anyone can write a perfectly crafted email with no grammar or spelling mistakes every time they push send. 

Now, a Harvard student by the name of Ben Horwitz has created what he calls the “anti-Grammarly tool” to add typos and subtle mistakes in text to make emails look like they were written by a human. 

He said of the tool, “It works. I tested Sinceerly by cold emailing 5 Fortune 500 CEOs. 4 replied. Of those replies, each was under 10 words. 2 replies had typos. One CEO called me Larry (my name is Ben – maybe they were using Sinceerly on ceo mode?).”

The tool is a Chrome plugin, wherein after a person writes an email, either through the use of AI or by traditional means, they can “humanize” it, according to the company’s website. The tool has three “modes” of human mistakes. One creates subtle mistakes, the other mode is human, and the third is in the apparent style of CEOs, using quick and to the point language without much attention to grammar or punctuation. 

“I am a terrible typist, naturally, and lightly dyslexic,” Horwitz told Business Insider. “It would take me so long in my first job straight out of college to write emails and make sure there were no typos and everything. When Grammarly came around, it was like, ‘Oh, OK, this is pretty good for me.’ But now my email inbox is filled with AI slop.”