Grammarly has entered into an agreement to acquire Superhuman, an email productivity tool, as part of its broader strategy to develop an AI productivity suite and expand its business offerings, executives said.
While the San Francisco-based firms did not reveal the deal’s financial details, Superhuman—once known for its invite-only model and lengthy waitlist—was last valued at $825 million in 2021 and currently generates around $35 million in annual revenue.
Grammarly’s acquisition of Superhuman comes on the heels of its recent $1 billion funding round led by General Catalyst, providing the company with ample resources to build a suite of AI productivity powered workplace tools.
Founded in 2009, Grammarly boasts over 40 million daily users and generates more than $700 million in annual revenue. The company is also considering a rebrand as it looks to expand its offerings beyond grammar correction.
Superhuman, backed by over $110 million in funding from investors such as IVP and Andreessen Horowitz, has focused on streamlining email productivity through AI integration.
According to the company, its users send and reply to 72% more emails per hour, and the use of its AI tools for composing emails has grown fivefold over the past year. However, it faces increasing competition as major email providers like Google and Microsoft continue to enhance their platforms with AI capabilities.
“Email continues to be the dominant communication tool for the world. Professionals spend something like three hours a day in their inboxes. It’s by far the most used work app, foundational to any productivity suite,” said Shishir Mehrotra, CEO of Grammarly. “Superhuman is the obvious leading innovator in the space.”
Last year’s purchase of startup Coda gave Grammarly a platform for AI agents to help users research, analyze, and collaborate. Email, according to Mehrotra who co-founded Coda, was the next logical step.
Superhuman CEO Rahul Vohra will join Grammarly as part of the deal, along with over 100 Superhuman employees.
“The Superhuman product, team, and brand will continue,” Mehrotra said. “It’s a very well-used product by tens of thousands of people, and we want to see them continue to make progress.”
Vohra said that the deal will give Superhuman access to “significantly greater resources” and allow it to invest more heavily in AI, as well as expand into calendars, tasks, and collaboration tools.
Mehrotra and Vohra see an opportunity to integrate Grammarly’s AI agents directly into Superhuman, and build the tools for enterprise customers.
The goal is to enable users to access a network of specialized AI agents that can draw information from their digital workflows—like emails and documents—helping them save time on tasks such as searching for data or writing responses. At the same time, the company is stepping into a highly competitive AI productivity market, going up against major players like Salesforce and a growing number of startups.
