How Grammarly Works

Communication Assistance Made Simple

Learn where you can use our generative AI assistance and writing suggestions, how Grammarly’s product interacts with your text, and how we continuously improve our AI to make our prompts and suggestions more helpful.

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What is communication assistance?

Grammarly leads the industry in building AI-enabled products to help people communicate effectively every day. With Grammarly's generative AI support and advanced writing suggestions, you can accelerate your writing process, 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
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Generative AI Writing Assistance at Your Fingertips

Grammarly is the AI communication assistant that’s up to speed on your context and preferred writing style. Use Grammarly's generative AI to unblock your ideas and enable accelerated productivity for teams and individuals.
Click the Grammarly button to compose, ideate, rewrite, and reply with an AI co-creator informed by your context and goals.

How are writing suggestions delivered?

Beyond Grammarly's generative AI that helps you write using simple prompts, our communication assistance also works at the revision level, providing trusted feedback on correctness, style, tone, and more.
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Choose what revision 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 on 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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Assistance across the whole writing process

Human thought and understanding don’t just start and end with words. The generative writing assistance we build spans the entire writing process from idea to revision in order to enhance understanding and productivity, and empower human connection and belonging.

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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.

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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!

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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

The way we make money is by selling subscriptions to our paid offerings. We don’t ever sell user data, and we take extreme care to ensure your data is isolated. Any writing that an individual or organization reviews with our writing assistance will never appear in another customer’s writing suggestions. 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.

By signing up, you agree to the Terms and Conditions and Privacy Policy.
California residents, see our CA Privacy Notice.