Grammarly
What it does: AI writing assistant for grammar and tone.
Who it's for: Anyone who writes emails, reports, essays or posts and wants to catch mistakes and sound clearer.
ProWritingAid checks grammar and spelling and goes further with in-depth style reports on things like pacing, repetition, sentence length and readability. It works in its own web editor and plugs into tools like Word, Google Docs and Scrivener.
Novelists, students, bloggers and anyone writing long documents who wants deeper feedback than a basic spell checker.
Free plan: yes · Paid plans from $10/month billed yearly (Premium)
Free version available. Premium $10/month billed yearly ($120/yr) or $30 monthly; Premium Pro $12/month billed yearly or $36 monthly.
Last verified Oct 15, 2026 on the official pricing page. Prices can change; check before you buy.
What it does: AI writing assistant for grammar and tone.
Who it's for: Anyone who writes emails, reports, essays or posts and wants to catch mistakes and sound clearer.
What it does: Paraphrasing and writing tool.
Who it's for: Students, non-native English writers and anyone who wants help rewording or tidying up text.
What it does: AI writer for SEO and marketing content.
Who it's for: Businesses and marketers who care about being found in AI chat answers and search results.
Getting started with AI chat assistants: prompting basics: How to choose a free AI assistant, write clear requests (prompts) that get useful answers, and avoid common beginner mistakes.