The feature brings task summaries, reminders, and AI-assisted overviews to make email management faster and smarter.

The Gmail AI Inbox is divided into two main sections: “Suggested to-dos” and “Topics to catch up on.” The first shows emails that need immediate action, such as a reminder about an upcoming bill or confirming a prescription shipment. 

The second group updates like delivery notifications and financial statements under categories like “Purchases” and “Finances,” making it easier to catch up at a glance.

“This is us delivering on Gmail proactively having your back, showing you what you need to do and when you need to do it,” said Blake Barnes, VP, Product at Google, in a briefing with reporters.

“Don’t worry, the traditional inbox will remain available. This is simply a new view you can toggle in and out of as you please to cut through the noise of your incoming mail.”

Google is initially releasing AI Inbox to trusted testers, with a wider rollout expected in the coming months.

Gmail is also adding AI Overviews to search. Users can now ask natural language questions like “Who was the plumber that gave me a quote for the bathroom renovation last year?” and receive answers summarised from emails. 

“We scour every email in your inbox, and we give you the answer to your questions right at the top,” Barnes explained. “So just like AI Overviews in Google Search, you can ask natural language questions to get an AI-powered response. However, in Gmail, the model relies solely on your email, your personal memory brain, to generate the response.”

This feature is available for Google AI Pro and Ultra subscribers.

Gmail is also launching Proofread, a tool that refines writing by providing one-click suggestions for clarity, conciseness, and correct word use. For example, it may suggest changing “might inflict disturbance” to “might disturb” or flag a misuse of “weather” versus “whether.”

Proofread is designed to reduce reliance on third-party tools like Grammarly and is rolling out to Pro and Ultra subscribers.

Other previously paid features are now accessible to all users. Help Me Write can draft emails from a single prompt, Suggested Replies offer context-based one-click responses, and AI Overviews summarise long email threads. Together, these tools aim to make composing, reading, and responding faster and more efficient.

Google emphasises that all AI features are optional, personal data is processed in isolated environments, and content isn’t used to train foundational models. The rollout begins in the U.S. for English-language users, with plans to expand to more regions and languages in the coming months.

With over 3 billion monthly users, Gmail is the world’s most widely used email service. Google’s AI upgrades, powered by Gemini 3, show how email has evolved since 2004, turning the inbox into a proactive assistant capable of helping users cut through information overload and get things done faster.

The deal reveals Grammarly’s intent to stake its claim in enterprise productivity, placing it in direct competition with Microsoft 365 and Google Workspace.

Per Reuters, the financial terms of the transaction were not disclosed. However, Superhuman was last valued at $825 million in 2021 and currently generates an estimated $35 million annually. 

With over $110 million in venture funding behind it, from names like Andreessen Horowitz and IVP, Superhuman had built a reputation for exclusivity and speed, with features that reportedly helped users send and respond to 72% more emails per hour.

Grammarly, founded in 2005, has gone beyond a grammar tool. After raising $1 billion in non-dilutive funding from General Catalyst in May 2025, the company is transforming into a full-fledged productivity platform. 

The acquisition of Coda in late 2024 laid the foundation for AI-powered collaboration, and Superhuman now brings email into the mix.

This acquisition also reveals an organisational change. Rahul Vohra, Superhuman’s CEO, will now join Grammarly’s leadership team, bringing along over 100 Superhuman employees. Yet Superhuman won’t be absorbed entirely. “The Superhuman product, team, and brand will continue,” said Grammarly CEO Shashir Mehrotra. 

“It’s a very well-used product by tens of thousands of people, and we want to see them continue to make progress.”

The two companies have an aligned vision of integrating Grammarly’s growing suite of productivity agents into Superhuman. These AI-powered tools are designed to help users summarise threads, generate replies, extract insights from documents, and sync with calendars, all from within the email client.

Vohra described the deal as a catalyst for growth: “This gives us significantly greater resources and allows us to invest more deeply in AI, calendars, tasks, and collaboration.”

With this, Grammarly is placing itself at the centre of a new development where AI assistants that function seamlessly across workflows, including email, documents, calendars, and beyond. 

Superhuman will be a testbed for this integration, potentially redefining what a modern email platform can do.

Nonetheless, the email space has become very competitive, with Google’s Gemini-infused Gmail and Microsoft’s Copilot for Outlook evolving fast. Startups like Shortwave and Missive are also moving speedily, embedding smart features directly into inboxes.

But Mehrotra is undeterred. “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,” he said.

What began as a premium, invite-only service targeting high-performance professionals now finds itself backed by one of the most widely used writing tools on the planet.

Grammarly, with over 40 million daily users and $700 million in annual revenue, is no longer content playing in the margins.