1. Grammarly
Grammar, spelling and tone suggestions everywhere you write.
Why it replaces Gmail AI Assistant: Covers similar ground in the Writing category: Grammar, spelling and tone suggestions everywhere you write.
Best Gmail AI Assistant Alternatives in 2026
Gmail AI Assistant is a strong option, but it is not the right fit for everyone. Below are 10 alternatives compared on rating, install base, pricing and the use case each one actually wins on.
About Gmail AI Assistant
Integrates AI writing assistance into the Gmail compose window.
Free
Full reviewComparison at a glance
| Extension | Rating | Users | Pricing | Best for |
|---|---|---|---|---|
| Gmail AI Assistant (original) | — | — | Free | Integrates AI writing assistance into the Gmail compose window. |
| Grammarly | 4.5 | 37M+ | Freemium | Professionals and students who write daily in the browser and want a safety net before hitting send. |
| Revision History: Writing Process Visibility for Google Docs & Slides | 3.7 | 200K+ | Freemium | Built for teachers: See how students write, not just what they wrote. View the writing process in Google Docs & Slides. |
| Justdone: GPT-4o AI Writing Assistant & Grammar Checker | — | — | Free | Elevate your writing with Justdone — your all-in-one tool for grammar checking, paraphrasing, AI writing, and more. |
| Ddict: AI Translation & Writing Assistant | — | — | Free | Translate text and enhance writing with AI for seamless language learning and communication in your browser. |
| Grammar Checker and AI tool - Correcto | — | — | Free | Improve your writing with the AI-powered online grammar and spelling checker in Spanish and our paraphrasing tool. |
| Fix Grammar and Spelling | — | — | Free | Instantly fix grammar and improve your writing in any text field. Check typos, preview changes, and apply corrections with one click |
| Zoho BluePencil: Free Grammar & Spell Checker | — | — | Free | Your secure writing assistant that gives you spelling, grammar, and style suggestions as you type. |
| Mobile Text Alerts for Gmail™ by cloudHQ | 4.0 | 10K+ | Free | Get mobile text alerts for emails that are urgent, from specific people, or once someone replies back |
| Google Dictionary (by Google) | 4.4 | 3M+ | Free | View definitions easily as you browse the web. |
| LanguageTool | 4.7 | 2M+ | Freemium | Multilingual writers and privacy-conscious teams who want a self-hostable alternative to Grammarly. |
Gmail AI Assistant alternatives in detail
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2. Revision History: Writing Process Visibility for Google Docs & Slides
Built for teachers: See how students write, not just what they wrote. View the writing process in Google Docs & Slides.
Why it replaces Gmail AI Assistant: Covers similar ground in the Writing category: Built for teachers: See how students write, not just what they wrote. View the writing process in Google Docs & Slides.
3. Justdone: GPT-4o AI Writing Assistant & Grammar Checker
Elevate your writing with Justdone — your all-in-one tool for grammar checking, paraphrasing, AI writing, and more.
Why it replaces Gmail AI Assistant: Covers similar ground in the Writing category: Elevate your writing with Justdone — your all-in-one tool for grammar checking, paraphrasing, AI writing, and more.
4. Ddict: AI Translation & Writing Assistant
Translate text and enhance writing with AI for seamless language learning and communication in your browser.
Why it replaces Gmail AI Assistant: Covers similar ground in the Writing category: Translate text and enhance writing with AI for seamless language learning and communication in your browser.
5. Grammar Checker and AI tool - Correcto
Improve your writing with the AI-powered online grammar and spelling checker in Spanish and our paraphrasing tool.
Why it replaces Gmail AI Assistant: Covers similar ground in the Writing category: Improve your writing with the AI-powered online grammar and spelling checker in Spanish and our paraphrasing tool.
6. Fix Grammar and Spelling
Instantly fix grammar and improve your writing in any text field. Check typos, preview changes, and apply corrections with one click
Why it replaces Gmail AI Assistant: Covers similar ground in the Writing category: Instantly fix grammar and improve your writing in any text field. Check typos, preview changes, and apply corrections with one click
7. Zoho BluePencil: Free Grammar & Spell Checker
Your secure writing assistant that gives you spelling, grammar, and style suggestions as you type.
Why it replaces Gmail AI Assistant: Covers similar ground in the Writing category: Your secure writing assistant that gives you spelling, grammar, and style suggestions as you type.
8. Mobile Text Alerts for Gmail™ by cloudHQ
Get mobile text alerts for emails that are urgent, from specific people, or once someone replies back
Why it replaces Gmail AI Assistant: Covers similar ground in the Writing category: Get mobile text alerts for emails that are urgent, from specific people, or once someone replies back
9. Google Dictionary (by Google)
View definitions easily as you browse the web.
Why it replaces Gmail AI Assistant: Another popular Writing extension: View definitions easily as you browse the web.
10. LanguageTool
Open-source grammar checker supporting 30+ languages.
Why it replaces Gmail AI Assistant: Another popular Writing extension: Open-source grammar checker supporting 30+ languages.
Compare Gmail AI Assistant head-to-head
Direct comparisons with the extensions people weigh against it.
Grammarly vs LanguageToolThe market leader against the open-source challenger with self-hosting and stronger multilingual support.Grammarly vs WordtuneCorrectness-first editing versus rewriting and tone control for the same sentence.LanguageTool vs WordtuneBoth are writing extensions people shortlist together — see how ratings, install base, pricing and day-to-day use differ.All comparisonsThe full compare hub, grouped by category.
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Frequently asked questions
What is the best alternative to Gmail AI Assistant?
Grammarly is the closest match. Covers similar ground in the Writing category: Grammar, spelling and tone suggestions everywhere you write.
Is there a free alternative to Gmail AI Assistant?
Yes — Justdone: GPT-4o AI Writing Assistant & Grammar Checker, Ddict: AI Translation & Writing Assistant, Grammar Checker and AI tool - Correcto are free.