Best AI Writing Tools for macOS in 2026
The best AI writing tools for macOS in 2026 are Echoo, Grammarly, ChatGPT, Apple Intelligence, Notion AI, Ritemark, and Writers Brew. Echoo is the best AI writing tool for Mac because it rewrites, proofreads, and translates the text you select in any macOS app from a keyboard shortcut - with no copy-paste into a separate window. Grammarly is best for always-on grammar and clarity fixes, ChatGPT is the most flexible for drafting long text, Apple Intelligence is the free built-in option on newer Macs, Notion AI is best inside Notion, and Ritemark is best for local-first Markdown editing.
The deciding factor for an AI writing tool on a Mac is not the model - most now use GPT, Claude, or Gemini - it is *where* the tool works. Some run in one place (a browser tab, a single editor, or one note-taking app); others work across every app you write in. If your writing is spread across Mail, Notes, Slack, a code editor, and the browser, a tool that edits text in place - wherever your cursor already is - removes the constant copy-paste round trip that single-app tools force on you.
The other factors that matter on macOS: whether it is free or built in, whether it runs privately (on-device or through a local model you control), and whether it can be automated into repeatable commands rather than one-off prompts.
Below are the AI writing tools worth considering on macOS in 2026, ordered by how well they fit a general "I write all over my Mac" need, with what each is genuinely best for.
The tools, ranked
EchooBest for Mac
Best for: Writing, rewriting, and proofreading inside any Mac app via a keyboard shortcut
A macOS app that rewrites, proofreads, translates, and reformats the text you select in any app - the result replaces your selection in place, so there is no separate window and no copy-paste. Works with GPT, Claude, Gemini, or a local Ollama model, so you can keep writing private and offline. Saved commands chain into multi-step workflows. Best for Mac users who write everywhere, not just in one editor or the browser.
Get EchooGrammarly
Best for: Always-on grammar, spelling, and clarity suggestions
Watches as you type and flags grammar, spelling, punctuation, and clarity issues across the browser and some desktop apps. Best if you mainly want passive proofreading and light rewrites in one tool, and are comfortable with cloud processing.
Echoo vs GrammarlyChatGPT
Best for: Flexible, conversational drafting and rewriting of longer text
The most flexible general-purpose writer - describe exactly what you want and it drafts, rewrites, or restructures. The Mac app adds a global shortcut, but the workflow is still a round trip: move text into the chat, prompt, copy the result back into your document.
Echoo vs ChatGPTApple Intelligence
Best for: Free, built-in writing tools on newer Macs
Built into recent macOS versions on supported Apple Silicon Macs, with Rewrite, Proofread, and Summarize in system text fields. Convenient and on-device, but limited to newer hardware, Apple’s models, and system-level text fields rather than every app and editor.
Notion AI
Best for: Writing and rewriting inside Notion documents
Drafts, rewrites, and summarizes directly inside Notion. Convenient if your writing already lives in Notion, but tied to that one app - it cannot help in Mail, Slack, or a code editor.
Echoo vs Notion AIRitemark
Best for: Local-first Markdown editing with built-in AI agents
A free, open-source visual Markdown editor that runs AI agents (Claude, Codex, Gemini) over local files with no upload. Excellent if your work is Markdown and you want a dedicated local-first editor. Narrower than a system-wide tool, though: the AI works inside Ritemark’s own editor, not across the other Mac apps you write in.
Writers Brew
Best for: A cross-app AI writing assistant on macOS
A Mac assistant that works across native apps, browsers, and Electron apps with rewrite, proofread, and chat features. A closer alternative to a system-wide approach, with its own bring-your-own-key model support.
WritingTools (open-source)
Best for: A free, Apple-Intelligence-style tool with local models
A free, open-source, system-wide grammar and rewrite assistant inspired by Apple Intelligence, with support for cloud APIs or local LLMs. Best for tinkerers who want a no-cost tool and do not mind setup.
Related Use Cases
Rewrite Text in Professional Tone on Mac
Instantly rewrite any text in a professional tone on macOS. AI-powered tone adjustment with Echoo keyboard shortcuts.
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.
Frequently Asked Questions
Echoo is the best AI writing tool for most Mac users because it rewrites, proofreads, and translates the text you select in any app from a keyboard shortcut, instead of confining AI to one editor or the browser. Grammarly is a strong alternative for always-on grammar checking, and ChatGPT is best for drafting longer text from scratch.
Yes. Apple Intelligence is built into recent macOS versions on supported Apple Silicon Macs at no cost, and WritingTools and Ritemark are free and open-source. Most paid tools, including Echoo and Grammarly, also offer a free tier or trial, and Echoo can run entirely on a free local Ollama model.
Yes - Apple Intelligence adds Rewrite, Proofread, and Summarize tools in system text fields on supported Apple Silicon Macs running recent macOS versions. It is convenient but limited to newer hardware and system text fields; third-party tools like Echoo work across every app and let you choose the AI model.
Ritemark is a standalone visual Markdown editor - its AI agents work on local files inside Ritemark. Echoo is system-wide: it edits the text you select in any Mac app (Mail, Notes, Slack, your editor, the browser) from a shortcut, and replaces it in place. Use Ritemark if you want a dedicated Markdown editor; use Echoo if you want AI writing help across everything you already use.
Yes. Echoo can route commands through a local Ollama model so text never leaves your Mac, Apple Intelligence runs many tasks on-device, and Ritemark keeps files local. Cloud tools like Grammarly, ChatGPT, and Notion AI send text to their servers for processing.
Try the Mac-native option
Download Echoo and rewrite, proofread, and translate text inside any Mac app with a shortcut.