Best AI Grammar Checkers for Mac (2026)
The best AI grammar checkers in 2026 are Echoo, Grammarly, ProWritingAid, LanguageTool, QuillBot, and Wordtune. Echoo is best for running an editable grammar prompt in any Mac app or inside a saved workflow; Grammarly is best for passive inline suggestions, and ProWritingAid is best for deep long-form reports.
AI grammar checkers use sentence context to catch errors that ordinary spell-check misses, including wrong-word choices, agreement problems, and inconsistent tone. Accuracy matters, but so do privacy, app coverage, and whether the checker preserves the writer’s voice.
These picks cover quick corrections, passive suggestions, multilingual checking, and long-form analysis.
The tools, ranked
EchooBest for Mac
Best for: Editable grammar commands and workflow automation in any Mac app
Runs a strict proofread prompt from a shortcut, replaces selected text in place, and supports cloud or local models. The prompt can be tailored to preserve voice, terminology, and formatting.
Get EchooGrammarly
Best for: Passive inline grammar suggestions
A polished checker that underlines grammar, spelling, clarity, and tone issues as you type.
Echoo vs GrammarlyProWritingAid
Best for: Deep reports for books and long documents
Combines grammar checks with reports on pacing, repetition, readability, and style.
Echoo vs ProWritingAidLanguageTool
Best for: Multilingual and open-source checking
Checks grammar and style across many languages and offers self-hosting options.
Echoo vs LanguageToolQuillBot
Best for: Grammar checking alongside paraphrasing
Pairs a browser grammar checker with its established paraphrasing editor.
Echoo vs QuillBotWordtune
Best for: Grammar-adjacent sentence rewrites
Improves awkward sentences through alternative phrasings rather than detailed rule explanations.
Echoo vs Wordtune
Related Use Cases
Fix Grammar on Mac with AI Shortcuts
Instantly fix grammar, spelling, and punctuation in any Mac app using Echoo AI shortcuts. No copy-pasting, no tab switching.
AI Proofreading on Mac with Shortcuts
Proofread text instantly on macOS with AI keyboard shortcuts. Catch grammar, spelling, punctuation, and style issues in any app.
Proofread a Document on Mac with AI
Proofread Word, Pages, Google Docs, and other documents on Mac with editable AI commands and private local-model options.
Frequently Asked Questions
Echoo is best for deliberate shortcut-based correction in any Mac app. Grammarly is better if you specifically want passive underlines while typing.
They can. Use a strict prompt that permits only necessary corrections, and review important legal, medical, academic, or financial text before accepting it.
Echoo can run grammar checks through Ollama on your Mac, while LanguageTool can be self-hosted.
Yes, but coverage varies. LanguageTool specializes in multilingual checking, while modern GPT, Claude, and Gemini models support many languages through Echoo.
Try the Mac-native option
Download Echoo and rewrite, proofread, and translate text inside any Mac app with a shortcut.