How Grammarly Works

Communication Assistance Made Simple

This page explains where you can use Grammarly, how Grammarly interacts with your writing, and how we continuously improve Grammarly to make our suggestions more helpful.

What is communication assistance?

Grammarly leads the industry in building AI-enabled services to help people communicate effectively every day. The words you choose can champion your voice, build connections, and spur your academic or professional growth.

Communication assistance with Grammarly means a consistent experience of robust, real-time feedback on your writing across:
More than 500,000 websites and apps
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Popular browsers and operating systems
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Laptops, desktops, phones, and tablets

How does Grammarly deliver suggestions?

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Choose what feedback Grammarly provides by selecting your writing style or preferred English dialect in your account settings.
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When you’re typing in the places you need communication assistance, Grammarly looks for opportunities in real time for you to improve your writing with just one click. 


The green Grammarly button will turn red, or the Grammarly widget will indicate the number of suggestions. Colored underlines in your text indicate where Grammarly offers various types of suggestions.
Correcting at the end of the day to at the end of the day with a comma and why


Clicking into the suggestion will reveal more information. Visit our demo page to see more about interactions and underlines.
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It’s up to you whether to accept or dismiss a suggestion. You can also mark the suggestion as relevant or not.
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Your interactions with the Grammarly product help our team discover which suggestions are useful, so our assistance can get smarter.
To see the categories of writing enhancements Grammarly provides, visit our Plans page.

How does Grammarly know what “good” writing is?

At the foundation of Grammarly’s product experience is a combination of human expertise and innovative technology.

Grammarly’s AI technology treats our writing as if it’s a translation. But instead of translating English to German, Grammarly translates bad English to correct English. Grammarly does this with the help of several linguists and a vast amount of literature it loads into its systems to train everything from deep neural nets—some of the most sophisticated AI technology—to simple, rule-based programs.

Alex Kantrowitz
Tech Journalist, “How Artificial Intelligence Made Me A Better Writer”
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Algorithms that learn writing from writing

Grammarly’s team of computational linguists and deep learning engineers designs cutting-edge algorithms that learn the rules and hidden patterns of good writing by analyzing millions of sentences from research corpora.

Learn more
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Correct isn’t good enough

Just because something’s grammatically correct doesn’t mean it’s clear or compelling. Grammarly’s suggestions help you fix overall delivery, poor word choice, tangled sentences, and even plagiarism. And we are adding new ways to improve your writing all the time!

Learn more
Have questions about Grammarly that aren’t answered here? Dive into our Support knowledge base for dozens of helpful articles.

What does Grammarly do with my data?

Your information is secure, private, and under your control

We don’t ever sell user data. The way we make money is by selling subscriptions to Grammarly products. Your words belong to you, and you choose where Grammarly analyzes your writing.
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Great Writing, Made Simple

Join over 30 million people who unlock the power of Grammarly every day to write with care and confidence.