Grammarly is one of the few tools I leave installed on every machine, because it earns its place by working everywhere. The browser extension catches errors in emails, web forms, Slack, and your CMS without any extra steps, so the editing happens where you already write instead of in a separate app you have to remember to open.
What it does best
Ubiquity. Other tools may match its suggestions inside a single editor, but none of them follow you across every box you type into all day, and that is the whole point. The value is not any one feature, it is the compounding effect of never sending the embarrassing typo, catching the unclear sentence before a client does, and matching tone without thinking about it. The tone detection in particular flags things a plain grammar checker misses, like a message that reads colder or more abrupt than you meant.
Pricing and what you actually get
For daily writers who produce client-facing work, the $12/month Pro plan on annual billing is an easy decision. The free tier has thinned out over the years, though. It is mostly grammar and basic spelling now, with clarity rewrites, tone suggestions, and the generative features gated behind Pro, so treat free as a spell-checker and Pro as the actual product. Enterprise pricing is quote-based with no published rate, which is worth knowing if you are buying for a team.
Where it falls short
Generation is not its strength. The AI writing help in Pro is fine for short emails, but for longer or creative work a dedicated assistant like Claude or ChatGPT produces a better raw draft. The workflow I would run is to write or generate elsewhere and let Grammarly do the final clean-up pass, which is the job it is genuinely best at. Watch one risk: its suggestions can over-sanitize and flatten the phrasing that gives your writing a voice. Take the corrections, question the "improvements" that make you sound like everyone else.
Who it's for
Anyone who writes professional or client-facing text across many apps and wants a consistent safety net, plus non-native English writers who benefit from the clarity and tone guidance. If you write entirely inside one tool that already checks well, or you only need occasional proofreading, the free tier or a built-in checker may be enough.
Getting the most out of it
Set your Goals before editing. Audience, formality, and domain all change what Grammarly recommends, and "Expert audience, Formal" produces very different advice than "General, Informal." Most people leave these on defaults and then wonder why the suggestions feel off. Two minutes of setup makes the tool noticeably smarter.
