Grammarly
AI-powered writing assistant for grammar, clarity, and style
What it does
Grammarly is a writing assistant that runs in the browser, desktop app, and native integrations for Google Docs, Microsoft Word, Outlook, and most web forms. It flags grammar, spelling, punctuation, style, tone, and clarity issues, and (on paid tiers) rewrites for concision, formality, and audience. GrammarlyGO adds generative-AI drafting, replies, and rewrites. Business tier adds team-wide style guides, brand tones, and consistency checks across everyone's writing. Its value is boring: fewer embarrassing typos in customer-facing writing, tighter proposals, on-brand tone across a team.
Free tier
Yes
Starts at
$12/mo
Setup
easy
Key features
Integrates with
Chrome, Firefox, Safari, Microsoft Office, Google Docs
Who this fits
- Sales teams sending high volumes of prospect emails
- Consultants and agencies writing proposals, decks, and client comms
- Customer support teams writing responses at scale
- Non-native English writers who need a second-set-of-eyes safety net
- B2B SaaS teams with a defined brand voice they want enforced
- Anyone whose typos have cost them credibility once — they know why
Who it does NOT fit
- Teams whose writing volume is trivial (Grammarly is overhead)
- Users who dislike inline correction and would ignore the suggestions (the tool works only when trusted)
- Highly technical writing where Grammarly flags jargon as errors (turn off style suggestions in those docs)
- Regulated industries where content must be reviewed by legal/compliance regardless (Grammarly does not replace review)
- Solo founders under 30 emails/day (browser spellcheck is enough)
Pricing
Real gotchas
- Grammarly reads what you type. Do not paste customer PII, secrets, or NDA-protected content into fields where Grammarly is active without confirming your enterprise settings
- Style suggestions are opinions, not rules. Turn them off in technical docs or you will fight the tool
- Free tier hides the most-useful rewrite features. The upgrade is real
- GrammarlyGO usage limits vary by plan — heavy generative use runs out on individual plans
- Team style-guide enforcement requires the Business tier
- Some browser combos (specifically old Safari + certain form editors) have integration bugs
- Not a plagiarism-detector for professional-grade academic use — Turnitin is stronger there
Integrations that matter
Otto’s take on this tool
Recommend Grammarly when: user's business is writing-heavy (sales emails, proposals, client comms, support responses) and the team is 2+. Best fit for consulting, agencies, sales teams, and B2B SaaS. Pairs with everything — Grammarly is a horizontal utility. Do NOT recommend for solo trades operators, or for teams whose writing volume is trivially small. Business tier is the honest recommendation when team size is 5+ and brand consistency matters. Warn about privacy on sensitive fields — legal, medical, and financial teams need to configure enterprise data-handling settings before rollout.
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Editor's curated reviews
10,453 reviews across TrustPilot - avg 3.2/5Curated by Otto from TrustPilot public reviews (fetched 2026-08-31). G2 and Capterra were consulted for aggregate context but not directly cited. Not user-submitted on Ottomately.
“ADHD USERS BEWARE! This program will drive you insane. constant flashing colors”
TrustPilot1.0/5“I have wasted days that I will never get back trying to get the Pro version working.”
TrustPilot1.0/5“Full refund, no questions, no delays, no haggling, 100% positive”
TrustPilot5.0/5“Using Grammarly is highly beneficial to me on a daily basis. The ease of use of this tool”
TrustPilot4.0/5“tried to cancel, told me not to worry yet stole 120 from my account.”
TrustPilot1.0/5“It does a great job of catching grammar mistakes, improving clarity, and helping me sound more professional”
TrustPilot4.0/5
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