Grammarly
The world's leading AI writing assistant. Fix grammar, improve clarity, match tone, and write with confidence — in every app you use.
Grammarly is the world's most widely used AI writing assistant — a tool that has evolved far beyond simple spell-checking into a comprehensive AI communication platform. With 30 million daily active users, it's installed on browsers, desktops, and mobile devices across every professional context imaginable.
In 2026, Grammarly's AI goes well beyond grammar. The GrammarlyGO feature generates full drafts, rewrites sentences for clarity or tone, adjusts formality levels, and provides real-time writing suggestions as you type — in Gmail, Google Docs, Microsoft Word, Slack, LinkedIn, and virtually every other writing surface you use.
What sets Grammarly apart from pure AI writing tools like Jasper or Copy.ai is its position as a writing improvement layer rather than a content generation engine. It works alongside your existing writing process — catching errors, improving clarity, and ensuring your communication hits the right tone every time.
💡 ProfitTools Take: Grammarly is the one AI writing tool we recommend to literally everyone — regardless of what other tools they use. The free plan is worth installing today. Premium ($12/mo) is one of the best-value professional tool upgrades available for anyone who writes emails, proposals, or content for business.
✓ Pros
- Works everywhere — browser, Word, Google Docs, Slack, email
- Real-time suggestions as you type
- Free plan is genuinely useful
- Tone detection prevents embarrassing emails
- GrammarlyGO generates drafts and rewrites
- Plagiarism checker included in Premium
- Team style guides in Business plan
- Best-in-class grammar and clarity detection
- Mobile keyboard app for on-the-go writing
✗ Cons
- GrammarlyGO not as powerful as dedicated AI writers like Jasper
- Occasional over-correction of stylistic choices
- Best features require Premium ($12/mo)
- Can feel intrusive if you prefer minimal suggestions
- Business plan pricing adds up for large teams
- No image or visual content generation
- Grammar & spelling checks
- Basic punctuation fixes
- Works in browser & Google Docs
- Limited tone suggestions
- 100 GrammarlyGO prompts/mo
- Everything in Free
- Advanced clarity & style suggestions
- Full tone detection & adjustment
- Plagiarism checker
- Word choice improvements
- Unlimited GrammarlyGO
- Formality level control
- Everything in Premium
- Team style guide & brand voice
- Admin dashboard & analytics
- Priority email support
- SAML SSO available
- Centralized billing
💡 Annual billing saves ~60% compared to monthly. Premium at $12/mo (annual) is one of the best-value professional tool subscriptions available — cheaper than a daily coffee and used every single working day.
| Feature | Grammarly | ProWritingAid | Jasper AI | Microsoft Editor |
|---|---|---|---|---|
| Best For | All professionals | Long-form writers | Content generation | Microsoft 365 users |
| Starting Price | Free / $12/mo | Free / $10/mo | $49/mo | Free with Microsoft |
| Real-Time Suggestions | ✓ Everywhere | ~ In-app only | ✗ No | ~ Microsoft apps |
| AI Text Generation | ✓ GrammarlyGO | ~ Basic | ✓ Best-in-class | ~ Copilot |
| Tone Detection | ✓ Excellent | ~ Good | ✗ No | ~ Basic |
| Plagiarism Checker | ✓ Premium | ✓ Premium | ✗ No | ✗ No |
| Browser Extension | ✓ All browsers | ~ Chrome only | ✗ No | ~ Edge/Chrome |
| Overall Rating | 8.9 / 10 | 8.2 / 10 | 9.1 / 10 | 7.8 / 10 |
"Grammarly Premium is the first tool I install on any new device. It's caught embarrassing errors in emails to clients more times than I can count. The tone detector is genuinely useful — it told me one email I was about to send read as 'aggressive' and I rewrote it. That alone has saved client relationships."
"I've been using Grammarly for 4 years and it's still essential. I use Jasper for first drafts and Grammarly to polish — the combination is unbeatable. Grammarly catches things Jasper misses, especially around sentence variety and awkward phrasing. At $12/mo it's one of the easiest tool decisions I make."
"Essential for non-native English speakers running a business. My first language is Portuguese and Grammarly has made my English communication dramatically more professional. The only reason I'm not giving 5 stars is that GrammarlyGO's text generation isn't as good as dedicated tools — but for editing and improvement it's the best available."