Grammarly has acquired Superhuman, the AI-powered email client that promises to make users respond to emails 1-2 days faster. The deal positions Grammarly to compete directly with tech giants like Google and Microsoft in Workplace AI productivity tools.
Both companies kept the financial details private. However, Superhuman was valued at $825 million in 2021 and generates about $35 million in annual revenue.
Grammarly Transforms Beyond Grammar Checking
The acquisition shows Grammarly’s shift from a simple grammar tool to a comprehensive AI productivity platform. CEO Shishir Mehrotra said email provides the perfect environment for multiple AI agents to work together.
“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,” Mehrotra explained.
The company serves over 40 million daily users and generates more than $700 million in annual revenue. Email represents Grammarly’s top use case, with the platform helping users write over 50 million emails each week.
Superhuman CEO Joins Grammarly Leadership
Rahul Vohra, Superhuman’s CEO and co-founder, will join Grammarly along with more than 100 employees. The Superhuman brand and product will continue operating independently.
“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,” Vohra said.
Superhuman has raised over $114 million from investors including Andreessen Horowitz, IVP, and Tiger Global. The company claims its users send 72% more emails per hour after using the platform.
AI Email Competition Heats Up
Google and Microsoft have both integrated AI capabilities into Gmail and Outlook, creating pressure on smaller players to innovate or consolidate.
Grammarly’s approach differs from competitors. Instead of building AI into existing email clients, the company has created what it calls an “AI superhighway” that works across 500,000 applications and websites.
This strategy allows Grammarly to deliver AI assistance wherever users work, rather than forcing them to switch to specific platforms.
Billion-Dollar Funding Powers Expansion
The Superhuman acquisition follows Grammarly’s $1 billion funding round from General Catalyst in May 2025. The non-dilutive financing gives Grammarly significant resources for acquisitions and product development without giving up equity.
The funding structure requires Grammarly to pay back General Catalyst with a capped percentage of revenue generated using the investment. This approach allows the company to maintain control while accessing growth capital.
Market Impact and User Benefits
The acquisition targets the massive email productivity market. Professionals spend approximately three hours daily managing email, representing over 1 trillion hours annually worldwide.
Superhuman users already see significant productivity gains. The platform helps users save more than four hours per week on email management. With Grammarly’s resources, these benefits could expand to millions more users.
The integration will also enable new features like AI-powered inbox triaging, automated meeting scheduling, and intelligent email drafting that incorporates context from across users’ work environments.
Future Plans and Platform Vision
Grammarly plans to expand Superhuman’s capabilities beyond email into calendars, tasks, and collaboration tools. The company will create an AI-native productivity suite that connects different work applications.
The vision includes AI agents that can perform research, analyze data, and collaborate across multiple platforms simultaneously. This approach could challenge established players like Microsoft Office 365 and Google Workspace.
Industry surveys suggest professionals expect a 3x increase in productivity within five years from AI tools. Grammarly’s multi-agent approach positions the company to capture this growth opportunity.
