• by Ray Schultz , Columnist, July 7, 2025

Grammarly, the writing assistant, is acquiring Superhuman, an AI-native email app, as it moves to position itself for the agentic future, the firm announced last week. 

The terms were not disclosed.  

This purchase helps bring Grammarly into the productivity platform for apps and agents, while making email a critical communication tool.

Email has become Grammarly’s top use case for professionals: The firm’s AI assistant helps to revise over 50 million emails per week across more than 20 email providers, the company says. These include Gmail, Outlook, Apple Mail, and Superhuman.

This is happening while professionals spend more than three hours daily in their inboxes.

“Email isn’t just another app -- it’s where professionals spend significant portions of their day, and it’s the perfect staging ground for orchestrating multiple AI agents simultaneously,” says Shishir Mehrotra, CEO of Grammarly.

How will Superhuman help this mission? Grammarly claims that 94% of Superhuman’s active users are embracing AI, and that they send and respond to 72% more emails per hour with Superman than they did before. 

“Email is the main communication tool for billions of people worldwide and the number-one use case for Grammarly customers,” says Rahul Vohra, CEO of Superhuman.

“By joining forces with Grammarly, we will invest even more in the core Superhuman experience, as well as create a new way of working where AI agents collaborate across the communication tools that we all use every day.” he adds. 

How can professionals use the new multi-agent combination? They can write a customer memo with Grammarly’s communication agent handling spelling and grammar, while a sales agent ensures accuracy, a support agent provides context about issues and a marketing agent suggests feature positioning, Grammarly states.

In a study conducted last year, Grammarly reported that users are hoping to use AI for agentic administrative support (44%), internal collaboration and coordination (39%), and strategic communications (36%).

Moreover, 66% hope to achieve a 3% increase in productivity within five years.