Grammarly

Grammarly checks your writing as you type in email, documents, social media and nearly anywhere else, with browser extensions, desktop apps and a keyboard for phones. It catches spelling and grammar errors and offers suggestions for clarity and tone. Its generative AI features can rewrite passages, draft replies, change the length or tone of text and help brainstorm. There are also tools for detecting AI-written text and checking for plagiarism on paid plans. Grammarly has a solid free plan and paid tiers for individuals and businesses. It is probably the best-known name in grammar checking.