What it does

Grammarly is the editor that follows you around. Browser extension, desktop app, Google Docs, Word, Gmail — everywhere you type, it's quietly fixing grammar, spelling, and punctuation, and nudging your tone when you sound harsher than you meant. The AI layer rewrites sentences, adjusts formality, and checks for plagiarism on the paid plan. So basically, it's a second pair of eyes that never gets tired.

Pricing that matters

The free tier is genuinely useful: full grammar and spelling correction plus 100 generative AI prompts a month, no card required. That's enough for most people's daily email and docs. Pro is $12 a month billed annually ($144 a year), or $30 month-to-month if you won't commit. Pro bumps you to 2,000 AI prompts a month, full-sentence rewrites, and plagiarism plus AI-text detection. As of Oct 2026 — always double-check the pricing page before you pay.

Best for

Anyone who writes emails, docs, and posts all day and wants them to land clean without thinking about it. If your job involves a lot of typing and a little embarrassment-avoidance, this is your tool.

The honest take

Here's the thing: Grammarly polishes what you already wrote. It doesn't draft for you, it doesn't brainstorm, it won't write the blog post. And the clarity suggestions can get aggressive enough to flatten your voice — you'll dismiss suggestions regularly, and that's fine. It's a copy editor, not a co-writer. For the actual writing part, you still need you.

Alternatives

Microsoft Editor: pick this instead if you live in Word and want the basics built in for free. QuillBot: pick this instead if paraphrasing and summarizing are the main job, not grammar.