In a bold move signaling its evolution from grammar checker to full-fledged AI productivity powerhouse, Grammarly has announced the acquisition of San Francisco-based email platform Superhuman. The move is set to deepen Grammarly’s positioning in the enterprise software landscape, where AI-driven efficiency is quickly becoming the new currency.
While the financial terms remain undisclosed, market indicators suggest Superhuman—once hailed as an elite, invite-only email client—was valued at $825 million during its 2021 funding round and currently generates $35 million in annual revenue.
Why This Acquisition Matters
At its core, this isn’t just a tech acquisition—it’s a platform consolidation. Grammarly, which already serves over 40 million daily users and brings in upwards of $700 million annually, is betting on a future where productivity apps are seamlessly integrated and powered by generative AI agents. With this acquisition, it now owns the most ergonomically acclaimed email tool on the market—an essential gateway to work communication.
“Email remains the foundation of modern work,” said Grammarly CEO Shishir Mehrotra. “Superhuman isn’t just a tool—it’s a user experience innovation. And it’s that level of craftsmanship that we want to scale.”
Mehrotra, who previously co-founded Coda (also acquired by Grammarly), now envisions a fully interoperable suite—where AI isn’t just a feature, but the core engine that helps professionals write, reply, plan, and prioritize with surgical precision.
What Superhuman Brings to the Table
Superhuman’s product philosophy has always centered around speed and control—designed for power users who value productivity over passive inbox management. With a user base of high-performing professionals, it has differentiated itself in a crowded email market by offering:
- Faster reply times (users reportedly send/respond to 72% more emails per hour)
- Smart composition powered by AI
- A UI that’s minimal, clean, and productivity-optimized
With over $110 million raised from top-tier investors such as Andreessen Horowitz and IVP, Superhuman has been quietly refining its stack—and this acquisition gives it the scale it needs to compete with the likes of Microsoft, Google, and Salesforce.
Strategic Vision: From Inbox to Enterprise AI OS
The real strategic kicker lies in integration. Mehrotra and Superhuman CEO Rahul Vohra (who will join Grammarly along with over 100 team members) plan to embed Grammarly’s advanced AI agents directly into the Superhuman ecosystem. This will likely include:
- Calendar, tasks, and document syncing
- Real-time AI summarization and recommendation tools
- Smart triaging and contextual nudges based on priority and intent
The goal? To create a frictionless enterprise experience where AI not only assists but executes—a major leap from current gen-AI assistants.
Vohra summed it up: “This gives us significantly more firepower—not just to improve email, but to redefine what work productivity means in the AI era.”
