QuillBot
Paraphraser, grammar checker and summariser in one
QuillBot is best known for its paraphrasing modes, which rewrite a passage for fluency, formality or length. It also bundles a grammar checker…
Grammarly
Grammar and clarity checker that works in every app
Grammarly checks spelling, grammar, tone and clarity wherever you type, from Gmail to Google Docs to Slack. The free tier catches the basics; Pro adds full-sentence rewrites, tone adjustment, plagiarism checks and AI drafting prompts.
Best for: cleaning up everyday writing
What works
- Works in nearly every browser and desktop app
- Free tier is enough for most people
- Tone and clarity suggestions, not just typos
What to know
- Monthly billing is pricey at $30
- Suggestions can flatten a distinctive voice
Alternatives
Rytr
Cheap, simple AI writer with 40+ templates
Rytr is the budget option: pick a use case, a tone and a language, get a draft. It will not replace a strategist, but for product descriptions…
Claude
Anthropic's assistant, strong at long documents and careful writing
Claude is the assistant many writers and developers reach for when tone and nuance matter. It works well with long documents, keeps a steady voice…