For years, I associated Grammarly with a very specific idea: helping people write better. If you had asked me what kind of company Grammarly might acquire, I would have guessed a more advanced writing assistant, a tool for authors, or an AI startup focused on text. An email client would have been far down that list.

Yet in 2025, Grammarly acquired Superhuman.

The more I thought about it, the stranger the deal seemed.

Acquisitions often reveal how a company imagines its future. That is why the interesting question is not how much Grammarly paid or whether the acquisition was expensive. The more interesting question is what Grammarly saw in an email company that justified such a move.

Because if the answer is simply that email contains text, the story ends there.

But I suspect there is more to it.

Looking for an Explanation

My first reaction was that I might be overthinking it. After all, email is one of the places where people do most of their writing. If your business helps users write better, acquiring an email tool does not sound particularly unusual.

That explanation started to feel incomplete when I looked at the broader context.

Before acquiring Superhuman, Grammarly had already acquired Coda. More recently, the company has expanded its focus around AI assistants and productivity tools. Viewed individually, each move seems reasonable. Viewed together, they begin to point in a direction.

At that point, I stopped asking why Grammarly bought an email company.

Instead, I started asking why a company built around writing assistance was expanding into places where conversations, decisions, and day-to-day work actually happen.

From Features to Habits

The idea that best explains these moves, at least to me, is the difference between a feature and a habit.

Correcting a sentence is a feature. Writing emails, collaborating on documents, and organizing information are habits. The distinction may seem small, but it has important consequences. Features solve specific problems. Habits occupy a permanent place in a person's daily routine.

That matters even more today, as many software features are becoming commodities. AI models improve rapidly, new competitors appear every month, and impressive capabilities are copied faster than ever. Habits are different. They are difficult to build and even harder to replace.

That is why the Superhuman acquisition feels more important than the rebrand itself.

Not because email is an especially attractive market, but because email remains one of the places where millions of people spend a significant portion of their working day. If you become part of that environment, you are no longer competing to offer a better feature. You are competing to become part of the user's workflow.

And that is a very different game.

I do not know if this is exactly Grammarly's strategy. But after looking at the sequence of moves—Coda, Superhuman, and the broader push into AI assistants—it is difficult to see the company as just a writing tool.

Maybe the real question was never why Grammarly bought an email company.

Maybe the real question is what Grammarly is trying to become.