Grammarly

Grammarly is an English writing assistant that works everywhere through a browser extension and desktop app. It suggests grammar and spelling fixes, tone and clarity improvements, and full sentence rewrites. It fits professionals, students, and writers who draft English across many apps such as email, documents, and messaging.

Its strength is ubiquitous access. An extension that plugs into nearly every app and website delivers real-time English proofreading, which is why ease of use leads at 93. Proofreading quality is also high at 91, so you can refine natural English without breaking your writing flow. It is the smoothest choice for users who want corrections right on the screen they already use, without opening a separate editor.

The limits are clear, though. It offers no Korean support, so it only helps with English and does nothing for Korean writing. There is no API either, which makes it hard to wire proofreading into your own service or an internal workflow. Advanced features are paid, starting at 30 dollars a month, or about 12 dollars a month on the annual plan.

In short, it is powerful for individuals who frequently write English across many apps and want real-time correction. Teams that need Korean proofreading, or that want to automate corrections through an API, should look at other tools alongside it.