(2025-07-01) Grammarly Acquires AI Email Client Superhuman

Grammarly acquires AI email client Superhuman. Grammarly announced Tuesday the acquisition of email client Superhuman in a push to build out its AI for its productivity suite. Neither companies provided details about the financial terms of the deal.

In the last few months, Superhuman has released AI-powered features related to scheduling, replies, and categorization. In its announcement, Grammarly said that it wants to build AI agents for emails using Superhuman’s tech. The company said that email remains one of the top use cases for Grammarly.

Last year, Grammarly acquired collaborative productivity software Coda, and as part of the deal, promoted Coda’s co-founder, Shishir Mehrotra, to CEO.

Pro: How Superhuman Just Scored a Major Sale to Grammarly

Grammarly, the popular writing assistance platform, has announced plans to buy Superhuman, a San Francisco-based company that uses AI to optimize email. Superhuman founder Rahul Vohra says in an interview with Inc. that “selling the company was not on my 2025 bingo card,” but that the resources and scale afforded to them by Grammarly were too exciting to turn down.

When Grammarly announced him as the company’s next CEO in December, Mehrotra wrote a blog post in which he described Grammarly as the “AI-native productivity suite,” a phrase that appears verbatim in Superhuman’s investor materials. Vohra took notice and reached out to Mehrotra. The two hopped on a call, and it quickly became clear they had complimentary visions for how to build a world-leading AI productivity service.

Mehrotra formally became Grammarly’s CEO in early January, and immediately began acquisition talks with Vohra, who previously hadn’t even entertained the idea of selling his company. Vohra says Superhuman is currently generating $36 million in annual recurring revenue, and in 2024 grew twice as fast as it did in 2023.

Con: Superhuman - What a joke, I will not promote.

Grammarly announced it’s buying them. The press release calls it a “big step toward an AI productivity suite,” but here’s what I see:

• Still the same Gmail skin. Services like Proton built new encrypted mail rails and real infrastructure. Superhuman glued hot-keys and Python macros on top of IMAP, slapped on a $350/yr price tag, and called it magic.
• Their onboarding was literally a 30-minute Zoom where someone taught you every shortcut, because the product was so terribly designed.
• The CEO spent more time onstage at TechCrunch events and any spotlight he could attach himself too meanwhile shipping nothing that moved email forward. Mission accomplished, I guess.
• Exit math feels rough for employees. Unless those ISOs were deep in the money, the staff probably walks away with pocket change while investors and the founder declare victory.
• Grammarly just raised another huge round and is getting squeezed by Microsoft/Google integrating the same AI writing helpers. So they buy a shiny email wrapper and hope it keeps them on top
• According to Reuters, Superhuman’s ARR is only $35 million and their last private valuation was $825 million back in 2021. Grammarly didn’t disclose a price, which tells me this was more about optics than upside.

Give it five years and nobody outside the Bay will remember Superhuman, but I’m sure we’ll still hear keynote stories about how inbox-zero was totally reinvented. Meanwhile Gmail will keep slowly being just good enough as we are waiting for someone to actually fix email.