Grammarly Pro tested on 3 real tasks: proofreading a 1,500-word blog, writing a cold email with GrammarlyGO, and AI content detection. Compared with QuillBot, ProWritingAid, and ChatGPT. Honest verdict inside.
Quick Verdict If you write in English every day, Grammarly is probably worth having around. The free version catches basic spelling and grammar well enough. The real value kicks in at $12/month with Pro: tone adjustments, sentence rewrites, plagiarism checks, and 2,000 AI prompts per month. But here is the thing — Grammarly is not for everyone. If you write fiction, technical docs, or anything where your voice matters more than correctness, Grammarly will fight you on every paragraph. And if you
Grammarly is the most complete writing assistant in 2026, but it is not the best at any single thing. Its real strength is coverage and convenience. If you write a lot in English every day, the Pro plan at $12/month is worth it. If you mainly need paraphrasing, get QuillBot instead.