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The bottom line
Good free proofreader, but Pro's rewrites and prompts cost more than most casual writers say they're worth.
Grammarly's free tier catches the basics — comma splices, tense slips, awkward phrasing — and several Reddit threads call it good enough on its own. The paid Pro tier, listed at €12/month on the pricing page, adds full-sentence rewrites, a Humanizer and AI Detector agent, plagiarism checks, and 2,000 AI prompts per member. Enterprise pricing is custom and now sold through Superhuman Go, per the pricing page.
The catch, according to multiple Reddit threads, is that the upgrade doesn't always pay off. Commenters on r/writing say Grammarly flattens voice, over-corrects commas, and struggles with fiction prose specifically. One user on r/writing called $140/year a personal judgment call rather than an obvious win. A maintainer thread on r/linux points to Harper, a free open-source alternative, as a reason some writers dropped the subscription entirely.
Good fit if
- Non-native English speakers writing business emails
- Students proofreading essays and theses
- Teams wanting shared style guides
Skip it if
- Fiction writers protecting a distinct voice
- Budget-conscious users already happy with free tier
- Writers who distrust AI-rewritten prose
ScoresHow it rates
What works
- Free plan catches real errors without a subscription
- Works inside Zendesk and most browser text boxes
- Pro adds full-sentence rewrites, not just word swaps
- Plagiarism and AI-text detection bundled into Pro
- Enterprise tier offers SSO, SCIM, and DLP controls
What doesn't
- Pro costs roughly $140/year, called debatable value on Reddit
- Multiple Reddit users say it weakens fiction and creative voice
- Comma suggestions criticized as overzealous by some users
- Copy-pasting from Grammarly can break document formatting
- Support quality for individual plans not published
01What Grammarly actually does
Grammarly is a proofreading layer that sits inside your browser, desktop apps, and tools like Zendesk, checking grammar, tone, and clarity as you type. The free plan covers basic mistake-catching and tone detection, plus 100 AI prompts a month, according to the pricing page.
Pro, at €12/month per the pricing page, adds full-sentence rewrites, plagiarism and AI-text detection, 2,000 AI prompts per member, and one style guide with one brand tone. Enterprise strips the caps entirely: unlimited AI prompts, SAML SSO, SCIM, custom roles, and BYOK encryption, sold at custom pricing and now routed through Superhuman Go for larger orgs.
Two newer features stand out on the homepage: a Humanizer agent meant to add personality back into AI-assisted drafts, and an AI Detector agent that flags likely AI-generated text. Both sit on top of the core proofreading engine rather than replacing it.
02Where Grammarly is strong
The free tier gets consistent praise for exactly what it's built to do: catching typos, comma splices, and awkward phrasing before a human editor sees the draft. One Reddit thread has commenters using free Grammarly daily just to speed up manual proofing, and several say the free version is "good enough" for everyday writing without ever upgrading.
For non-native English speakers handling business correspondence, Pro gets specific credit. A commenter on r/writing who uses Pro for work email says it's "by no means perfect" but reliably catches common errors and offers useful style and repetition suggestions.
- Fast, low-friction catches for grammar and punctuation across browser, desktop, and apps like Zendesk
- Free plan is functional on its own, not just a demo
- Useful as a first pass before human editing, per multiple Reddit threads
- Plagiarism and AI-text detection bundled into Pro at no extra line item
The pattern across threads: people trust it for mechanical fixes, not judgment calls.
03Where it falls short
Fiction writers are the harshest critics. One r/writing commenter calls it "completely useless for fiction prose," and others say it flattens voice into generic business-letter tone. That's a structural limit, not a bug — the tone and clarity model is trained for clarity, not style preservation.
Pro's price draws skepticism too. A commenter doing the math on Grammarly Pro at roughly $140/year asks whether it's worth it for Pro, and concludes that's a personal call, not an obvious yes. Several threads say the free version covers 90% of real use cases, making the jump to €12/month, per the pricing page, hard to justify for casual writers.
Practical annoyances also show up repeatedly: one user reports that copy-pasting from Grammarly into Google Docs breaks paragraph formatting, forcing manual re-indenting. Another flags that the free tier only surfaces a fraction of detected issues, holding the rest back for paywall. None of these are dealbreakers, but they explain why so many Reddit threads land on "free is enough" rather than recommending Pro outright.
04Grammarly pricing: what you'll actually pay
Grammarly's Free plan costs nothing and includes 100 AI prompts a month, basic grammar fixes and tone detection. That's fine for quick emails, but it caps out fast if you're drafting longer documents or using the tone rewriter often.
Pro runs €12 per month per the pricing page and jumps to 2,000 prompts per member, plus full-sentence rewrites, plagiarism and AI-text detection, and one style guide with one brand tone. That's a 20x prompt increase over Free, which is the real reason to upgrade — not the rewrite feature itself, which some casual writers say isn't worth the price difference.
Enterprise drops the published price entirely. You get unlimited prompts, SAML SSO, SCIM, DLP and BYOK encryption, but you'll need to talk to sales for a number.
One gotcha: the free trial of Pro auto-cancels only if you remember the email reminder sent two days before it ends. Business plans with 10+ seats on annual billing can also pay by invoice, bank transfer, card, Apple Pay or Google Pay — useful if procurement won't take a credit card.
05Switching to (or from) Grammarly
Grammarly works inside existing text boxes — Zendesk, email, docs — so there's no real onboarding migration. You install the extension or app and it starts checking what you already type. That low-friction setup is also why teams often don't audit it closely before signing up for Pro.
Leaving is less documented. The pricing page doesn't say anything about exporting your style guides, saved tone settings or prompt history, so treat that as not published and assume you'd rebuild those manually elsewhere.
Per the product's own framing, Grammarly fits non-native English speakers writing business email, students proofreading essays, and teams wanting one shared style guide. It fits less well for fiction writers protecting a distinct voice, anyone already satisfied with the free tier, and writers who don't trust AI-rewritten sentences — these are the groups most likely to cancel once the novelty of full-sentence rewrites wears off.
From the threadsWhat users say
Reddit users are split: many like Grammarly's free tier for catching basic errors, but writers warn it flattens voice, adds unneeded commas, and can't be trusted for fiction or formal prose. Non-native speakers and business users tend to find the paid tier worthwhile, while fiction writers mostly skip it.
it’ll kill the unique style of your voice
It's completely useless for fiction prose, and even in formal writing it's wrong far too often to trust it
it does its job well enough
the paid version simply doesn't add enough features for me to make it worth buying
Questions people ask
Is Grammarly better than other grammar checkers and writing apps?
Reddit threads show no clear winner. Writers on r/writing mention Hemingway App and ProWritingAid as better at catching passive voice and repeated words, and r/linux users point to the open-source Harper as a free alternative. Grammarly's own pages list paragraph rewrites and tone suggestions as its edge, but we haven't tested any of these against each other.
Why do I have a $144 charge from Grammarly?
That's likely an annual Pro subscription charge. Grammarly's pricing page lists Pro at $12 per month, which works out to $144 if billed yearly in one lump sum. A commenter on r/writing separately cited $140 per year for Pro, close to this figure, so a $144 charge is consistent with an annual Pro renewal rather than an error.
How do I cancel my Grammarly subscription?
Grammarly's pricing page says the free trial of Pro cancels automatically and sends an email reminder two days before it ends, so you can cancel before being charged. Exact cancellation steps for paid monthly or annual plans aren't published in the sources we have; check your account billing settings directly on Grammarly's site.
How trusted is Grammarly among writers?
Trust is mixed. Some Reddit users rely on it daily as a first-pass proofreader, including one who uses Grammarly Pro for business correspondence as a non-native English speaker. Others on r/writing say it's wrong too often to trust for formal writing and call it completely useless for fiction prose, so treat suggestions as a starting point, not a final check.
Is Grammarly Pro worth paying for?
Opinions split by use case. A r/writing commenter said the free version was good enough and the paid tier didn't add enough to justify buying it, while another called Pro worth $140/year for cleaning up business writing as a non-native speaker. Grammarly's pricing page lists Pro at $12/month for full-sentence rewrites, plagiarism detection, and more AI prompts.