Grammarly solves a narrower problem than most tools in this category, and solves it more thoroughly: making everyday writing correct, consistent, and appropriately toned, wherever you type. Grammar, spelling, punctuation, clarity, and tone suggestions run in the browser, on the desktop, and inside the apps you already use, which is why it persists in professional workflows long after novelty tools fade.

The everyday value is the background layer. It catches the errors you stop noticing in your own writing, flags tone that will land wrong in an email, and keeps terminology consistent across a team. The generative features — rewriting a sentence, shortening a paragraph, adjusting formality — are competent for business writing, which is exactly the register most people need most of the time.

Where it disappoints is creative and long-form work. Suggestions can feel rigid, flattening a voice that was deliberate, and for drafting substantial content from scratch, chat-based assistants are more capable and more flexible. Grammarly is best at improving what you have written, not at producing it.

The free plan is one of the more usable in the category, covering core corrections, tone insights, and a monthly allowance of AI prompts. Pro adds heavier rewriting, fuller tone control, brand and style guidance, and higher limits. Confirm what your plan includes, since feature packaging has changed over time and the AI features in particular have moved between tiers.

One practical note: because it works everywhere you type, it is easy to forget it is reading what you type. Check how your organization treats that before using it on confidential material.

A practical way to get the most from it: pay attention to what it flags repeatedly and learn the pattern, rather than accepting every suggestion by habit. Over time that is where the real improvement comes from. For team use, configure the style guide properly — preferred terms, tone, formatting — since consistency across a document set is a benefit individuals cannot get alone. And decide deliberately whether it should run on every field you type in, or only where you want it.

Best for professionals who need polished everyday writing across many apps. Not for creative writing, long-form generation, or anyone uneasy about a writing assistant seeing everything they type.