9 AI Grammar Checkers That Make Your English Sound Professional
Fix emails, proposals and posts before anyone else reads them.
Key Takeaways
- Best all-round: Grammarly
- Most languages: LanguageTool
- Cheapest listed: Wordtune
- Best for papers: Trinka
The 9 best AI grammar checkers in 2026 help you send clean emails, proposals and posts without a second read.
Top 9 AI grammar checkers at a glance
| Tool | Best for | Free plan |
|---|---|---|
| 1. Grammarly | Full AI writing help | Yes |
| 2. LanguageTool | Many languages | Yes |
| 3. ProWritingAid | Authors and long writing | Yes |
| 4. Wordtune | Rewriting sentences | Yes |
| 5. Ginger | Context-based corrections | Yes |
| 6. Trinka | Academic papers | Yes |
| 7. Hemingway Editor | Plain, readable text | See website |
| 8. Sapling | Business and support teams | Yes |
| 9. Writefull | Research papers | See website |
Jump toGrammarlyLanguageToolProWritingAidWordtuneGingerTrinkaHemingway EditorSaplingWritefull
The 9 best AI grammar checkers in 2026
1. Grammarly
Grammarly checks grammar, spelling and tone, and can rewrite full sentences. It works in your browser and in the apps you already write in, so it can check your writing wherever you type.
Best for: Full AI writing help
Free plan: Yes, free plan with spelling and grammar checks and 100 AI prompts a month
Price: Pro listed at $12 USD on the Grammarly website
Website: grammarly.com
2. LanguageTool
LanguageTool checks spelling, grammar, punctuation and style in more than 30 languages and dialects. It also has an AI paraphraser, browser add-ons and Word and Google Docs support.
Best for: Many languages
Free plan: Yes, Basic plan with 2,000 characters per text field and 3 paraphrases a day
Price: Premium and Teams plans
Website: languagetool.org
3. ProWritingAid
ProWritingAid is a writing toolkit built for authors. It covers grammar, spelling and punctuation, plus line editing reports and a Rephrase tool for sharper sentences.
Best for: Authors and long writing
Free plan: Yes, includes grammar checks, 2 runs a day of each line editing report and 10 Rephrases a day
Price: Premium $10 a month billed yearly; $30 a month billed monthly; lifetime $399
Website: prowritingaid.com
4. Wordtune
Wordtune is an AI paraphrasing and writing assistant. It rewrites sentences, fixes grammar and spelling, changes tone and summarises documents. It writes in English only.
Best for: Rewriting sentences
Free plan: Yes, Basic plan with 10 rewrites a day and unlimited spelling and grammar checks
Price: Advanced $4.89 a month and Unlimited $6.99 a month, both billed annually
Website: wordtune.com
5. Ginger
Ginger corrects grammar, spelling and punctuation using the context of the whole sentence. It also rephrases text and has apps for Windows, macOS, iOS and Android.
Best for: Context-based corrections
Free plan: Yes, a free version
Price: Premium plan
Website: gingersoftware.com
6. Trinka
Trinka is a grammar checker for academic and technical writing. It has a paraphraser, a citation checker and a Word add-in, and says it is built for formal English and Spanish.
Best for: Academic papers
Free plan: Yes, Basic plan with 5,000 words a month, no credit card needed
Price: Premium plans
Website: trinka.ai
7. Hemingway Editor
Hemingway Editor is a writing tool that helps keep your writing clear. Hemingway Editor Plus uses AI to fix highlighted issues, check grammar and change tone.
Best for: Plain, readable text
Free plan: Free 2-week trial of Plus, no credit card
Price: Individual 5K plan $100 a year ($8.33 a month)
Website: hemingwayapp.com
8. Sapling
Sapling gives real-time writing suggestions inside business workspaces and messaging tools. It suits support teams, and developers can also use its API.
Best for: Business and support teams
Free plan: Yes, Free plan with basic suggestions
Price: Pro $12 a month billed annually, or $25 a month billed monthly
Website: sapling.ai
9. Writefull
Writefull is an AI writing assistant for academic writing, with language feedback from models trained on journal articles. It works with Word and Overleaf.
Best for: Research papers
Free plan: See website
Price: See website
Website: writefull.com
Free AI grammar checker options
Most tools here have a free plan, so you can try an AI grammar checker online before paying. Grammarly, LanguageTool, ProWritingAid, Wordtune, Ginger, Trinka and Sapling all offer one. Hemingway Editor offers a free two-week trial of its Plus plan.
AI grammar checker and paraphraser: which one to pick
If you also want sentences rewritten, look at Grammarly, LanguageTool and Wordtune. For an AI grammar checker for English academic papers, look at Trinka and Writefull. For long books and stories, ProWritingAid fits best.
Final verdict
Start with Grammarly if you want one tool for most writing, or LanguageTool if you write in more than one language. Open two free plans, paste in a real email, and keep the one whose fixes you trust.
