Best Grammar AI Tools

Grammarly

Writing & Text

★★★★★

AI-powered writing assistant checking grammar, tone, clarity, and plagiarism. Integrates across browser, desktop, mobile, and 500K+ apps. 40M+ daily users.

Quillbot

Writing & Text

★★★★☆

The most popular AI paraphrasing tool. Rewrites text while preserving meaning. Grammar checker, summarizer, and citation generator built in. 50M+ users.

Wordtune

Writing & Text

★★★★☆

AI writing companion focused on tone and clarity. Rewrites sentences in real-time across casual, formal, persuasive, and dozens of nuanced tones — not a content generator.