What is the best AI tool for checking grammar and spelling?

On AIToolMaps, Grammarly ranks first for checking grammar and spelling, followed by QuillBot and Wordtune. The ranking weighs how central the job is to each tool, how complete and checked its listing is, and what members upvote, save and review.

Is there a free AI tool for checking grammar and spelling?

Yes. 7 of the 7 tools listed for checking grammar and spelling have a free plan or are free to use, including Grammarly, QuillBot and Wordtune.

Which AI tools for checking grammar and spelling have an API?

2 of them offer an API for developers, including GPTZero and Originality.ai.

Can I do checking grammar and spelling on my phone?

Yes. 1 of the tools have an iPhone or Android app, including Grammarly.

Task · Writing

Best AI tools for checking grammar and spelling

Ranked by how central this job is to each tool, how complete and checked its listing is, and what members upvote, save and review.

Tools: 7
Free options: 7
Updated: Nov 4

Sort

1
GrammarlyVerified Nov 3, 2026
An AI writing assistant that checks grammar, tone, and clarity for individuals, teams, and organizations.
Free tier · from $12/moWeb, Windows, Mac, Android, iOS
Visit
2
QuillBot
Paraphrasing and writing tool that rewrites text in several modes with grammar checking built in.
Free tierWeb, Browser extension
Visit
3
WordtuneVerified Nov 4, 2026
AI writing assistant for students and professionals to rewrite, proofread, summarize, and translate into English.
Free tier · from $4.89/moBrowser extension
Visit
4
Hemingway Editor
Readability editor that highlights hard-to-read sentences, passive voice and adverbs in your writing.
Free tierWeb, Mac, Windows
Visit
5
GPTZeroVerified Nov 4, 2026
AI-writing detector for teachers, students, and editors who need to check text and writing process.
Free tierWeb, Browser extension
Visit
6
Originality.aiVerified Nov 4, 2026
Checks text for AI-written content and plagiarism for writers, editors, teachers, and publishers.
Free tier · from $12.95/moWeb, Browser extension
Visit
7
SuperhumanVerified Nov 4, 2026
AI assistant and work suite for individuals and teams, with agents in tabs, email, and docs.
Free tier · from $12/moWeb, Browser extension
Visit

How to choose

Grammarly is a general writing assistant that checks grammar, spelling, punctuation, clarity, and tone as you type and works across browsers and Windows, Mac, Android, and iOS; its free plan covers basic proofreading, while paid plans add full-sentence rewrites and tone changes. QuillBot centers on paraphrasing but includes a grammar and spelling checker, with a free tier that limits words per session and a Chrome extension. Wordtune is a browser extension that combines grammar checks with rewrites, tone switching, summaries, and translation into English, with daily and monthly caps on free use. GPTZero focuses on AI-text detection but also offers grammar feedback.

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Common questions

What is the best AI tool for checking grammar and spelling?: On AIToolMaps, Grammarly ranks first for checking grammar and spelling, followed by QuillBot and Wordtune. The ranking weighs how central the job is to each tool, how complete and checked its listing is, and what members upvote, save and review.
Is there a free AI tool for checking grammar and spelling?: Yes. 7 of the 7 tools listed for checking grammar and spelling have a free plan or are free to use, including Grammarly, QuillBot and Wordtune.
Which AI tools for checking grammar and spelling have an API?: 2 of them offer an API for developers, including GPTZero and Originality.ai.
Can I do checking grammar and spelling on my phone?: Yes. 1 of the tools have an iPhone or Android app, including Grammarly.