Grammarly

Grammarly is an English writing assistant that watches your grammar, spelling, punctuation, style and tone. It is built by the company of the same name in the US, and today it is used by tens of millions of people and thousands of organizations worldwide. It fits anyone who writes in English and wants it to sound correct and professional, whether students, founders, marketers or non-native speakers.

It works quietly right where you write: you install a browser extension or app, and Grammarly underlines mistakes in real time and suggests fixes in emails, documents and on social media. It measures not just correctness but also clarity, sentence length and overall delivery, and shows you what tone your words convey to the reader.