Grammarly has announced the acquisition of Superhuman, the high-speed, AI-powered email client, marking its most ambitious step yet toward transforming into a full-scale AI productivity platform.
The deal, disclosed Tuesday, comes as Grammarly seeks to deepen its foothold in core professional workflows and bring its AI capabilities into a tool that professionals use every day: email.
Though neither Grammarly nor Superhuman disclosed the financial terms of the acquisition, the move is significant. Superhuman, founded by Rahul Vohra, Vivek Sodera, and Conrad Irwin, has raised more than $114 million from top-tier investors such as Andreessen Horowitz (a16z), IVP, and Tiger Global. The company was last valued at $825 million, according to data from venture analytics firm Traxcn.
Over 100 Superhuman employees, including CEO Rahul Vohra, will join Grammarly as part of the deal.
A Strategic Expansion into Email
Grammarly CEO Shishir Mehrotra said the acquisition aligns with the company’s vision of embedding AI deeply into daily professional tasks and enabling seamless collaboration between multiple AI agents.
“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 said in a statement.
With the acquisition, Grammarly gains direct control over a well-loved email platform optimized for speed, intelligence, and user focus. It also brings in a layer of innovation that Superhuman had been building over recent months, including features that assist with scheduling, replying, triaging, and categorizing emails—using AI.
Superhuman CEO Rahul Vohra echoed the synergy between the two companies, stating that “Email is the main communication tool for billions of people worldwide and the number-one use case for Grammarly customers.” He added that joining forces with Grammarly would allow Superhuman to invest more in its core experience while pioneering a new way of working where AI agents assist users across daily communication tools.
Building the Future of AI Workflows
Grammarly’s ambitions go beyond spelling and grammar. In recent years, the company has been quietly transforming its business model to encompass full-spectrum productivity. In 2023, Grammarly acquired Coda, a collaborative document platform, and elevated Coda co-founder Shishir Mehrotra to CEO. Now, with Superhuman, Grammarly owns not just how people write and collaborate—but also how they communicate.
The company is pursuing a vision where multiple AI agents work in unison to help users handle their work more effectively. Email, given its frequency of use and complexity, is now central to that plan.
“The future of productivity will be shaped by AI agents that can handle tasks like drafting responses, prioritizing messages, managing schedules, and integrating across platforms,” Grammarly said in a blog post. “With Superhuman, we now have the foundation to make this vision a reality.”
Grammarly’s latest move positions it more directly against other tech giants like Google, Microsoft, and Salesforce, all of which are embedding AI across email and productivity suites. What differentiates Grammarly is its singular focus on agentic AI—that is, purpose-specific AI agents capable of working across tools, understanding user context, and executing semi-autonomous tasks.
The company also has the financial backing to support this vision. In May, Grammarly secured a $1 billion non-dilutive investment from General Catalyst. Rather than give up equity, Grammarly will repay the money as a capped percentage of revenue generated from projects funded with the capital. The investment gives Grammarly the fuel to scale its product vision without diluting existing shareholder value.
Grammarly plans to integrate Superhuman’s functionality into its broader suite while continuing to support Superhuman as a standalone email client. Users can expect features such as AI-powered triage, personalized summaries, and multi-agent task execution to begin appearing in both platforms in the coming months.
Additionally, Grammarly says its acquisition of Superhuman accelerates its goal of making email a command center for agentic AI—where users can draft responses, schedule meetings, file attachments, and automate workflows without switching apps.
The company is also eyeing enterprise adoption, with Superhuman’s speed and efficiency complementing Grammarly’s growing suite of enterprise tools. Email remains a universal and essential tool for professional communication, and owning the stack allows Grammarly to embed intelligent agents directly into one of the most time-consuming areas of work.
The acquisition comes amid heightened competition in the AI productivity space. Microsoft is embedding its Copilot AI across Outlook and Teams, Google is pushing Gemini into Gmail and Docs, and startups like Anthropic and Notion are racing to define how AI integrates with daily workflows.
With over 40 million daily users and more than 50 million weekly email-based corrections already running through its systems, Grammarly has the user base and data pipeline to make its agentic vision a reality. Owning Superhuman adds a premium, fast-moving frontend to that backend infrastructure.