A Grammarly alternative that works in any Windows app
Lightphrase is a Windows desktop utility. Highlight text in Gmail, Slack, or any editable field, press Win+Ctrl+R, and the selection is rewritten where it sits. Grammarly is a checker and overlay that works in many apps. Lightphrase is not a grammar score in the margin — it is select, shortcut, replace in place.
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Lightphrase and Grammarly, side by side
People who look for a Grammarly alternative on Windows usually want writing help without leaving the app they are already in. Grammarly and Lightphrase both try to meet that need. They are not the same kind of tool.
Grammarly is a writing assistant. It underlines issues as you type, scores a document, and offers rewrites in the surfaces it supports — browsers, its desktop overlay, Google Docs, and more. Lightphrase is a tray utility from Mason Solutions. It does not watch keystrokes. It waits for a selection and a shortcut, then replaces that selection in place.
The table below is an honest split. Grammarly wins on full-document grammar, a score, browser-extension depth, and Mac and web coverage. Lightphrase wins on OS-level selection rewrite without an overlay, wheel actions, clipboard restore, and free early access on Windows.
| Feature | Lightphrase | Grammarly |
|---|---|---|
| In-place replace | Yes. Highlight, shortcut, and the selection is replaced where it sits. | Suggestions and rewrites in supported apps, not a system-wide replace. |
| Overlay / underline | No overlay and no underlines. The wheel opens on demand. | Yes. As-you-type underlines, a score, and a desktop overlay in many apps. |
| System-wide shortcut | Win+Ctrl+R from the tray, while another app is focused. | Shortcuts inside Grammarly's own surfaces, not an OS-level rewrite. |
| Works in any editable field | Yes, any field that accepts copy and paste. | Many apps via the extension and desktop overlay; not every native field. |
| Translate selected text | Translate is a wheel action on the current selection. | Strong as a checker; not built as a selection translator. |
| Reply without overwriting | Reply copies a response and leaves the selection unchanged. | Can draft replies in some integrations, such as email. |
| Clipboard restore | Snapshots the clipboard before the copy and puts it back after the paste. | Not a clipboard-based rewrite, so this does not apply. |
| Platforms | Windows today. macOS and Linux are in development. | Windows, Mac, web, iOS, Android, and browser extensions. |
| Price | Free early access for the first 1,000 accounts. 1,000 rewrites a day. | A free checker, with paid plans for more features. |
Neither product is a drop-in replacement for the other. If you want a checker sitting in the margin of a long draft, Grammarly is the better fit. If you want to highlight a paragraph in Slack or a document and have it rewritten where it sits, Lightphrase is the Windows tool built for that. Grammarly's plans and supported apps change; the Lightphrase column describes version 0.1.4.
How Lightphrase works
Lightphrase stays in the tray after you sign in. There is no extra window to keep around. Highlight what you wrote, press Win+Ctrl+R, and sweep the wheel. That is the whole gesture to rewrite selected text in any Windows app.
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1. Highlight the text
Select text in any editable field: Gmail, Slack, a document, a note, a mail compose box, or a browser form. Read-only page text cannot be replaced.
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2. Press Win+Ctrl+R
The wheel opens on your pointer. Lightphrase stays in the tray; there is no extra window to find.
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3. Sweep to an action
Hold and push toward Retone, Translate, Summarize, Fix Grammar, or Reply, then release. Rewrites replace the selection; Reply copies a response. Past the rim still counts.
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4. Rewrites replace; Reply copies
Rewrites replace the selection where it sits; Reply copies a response. Your clipboard is snapshotted before the copy and put back after the paste.
Translate sits on that same wheel, so you can translate selected text without opening another tab. If the selection is a message you received, Reply copies a draft and leaves the original alone. If you are composing mail, the same shortcut can rewrite email in the field you already have open.
- Gmail
- Slack
- Any browser
When to pick Grammarly vs Lightphrase
Pick Grammarly when you want a checker
Grammarly is built to sit on a document. It underlines grammar and spelling as you type and gives you a score. The browser extension is deep: Gmail, Google Docs, and many web editors get suggestions without a shortcut. Grammarly also ships on Mac and on the web, with mobile keyboards and a long list of integrations. If you are finishing a report and want the whole file reviewed before you send it, that is Grammarly's job. Lightphrase will not score a document, and it will not underline as you type.
Pick Lightphrase when you want a rewrite in place
Pick Lightphrase when the writing is already in another Windows app and you want the selection rewritten there. A Slack message that sounds too sharp, a paragraph in a document you want shorter, an incoming message you should not overwrite — highlight, press Win+Ctrl+R, sweep. There is no overlay to dismiss and no sidebar to dock. The wheel gives you Retone, Translate, Summarize, Fix Grammar, and Reply in one gesture. Reply copies a response instead of pasting over the incoming text. Clipboard restore means whatever you had copied before the rewrite is still there after.
You can use both
They do different jobs, and they can sit on the same machine. Keep Grammarly for as-you-type checking in the browser. Use Lightphrase when you want to retone a paragraph in a desktop app Grammarly does not overlay well, or when you want a selection rewritten without a score in the margin.
What Lightphrase does not do is also worth stating. It is available on Windows today; macOS and Linux are in development. It is an early-access app from Mason Solutions, installed from the Microsoft Store. It is free during early access for the first 1,000 accounts, with 1,000 rewrites a day per account, resetting every UTC day. It is not a full-document grammar engine.
Frequently asked questions
Is Lightphrase a Grammarly alternative for Windows?
Yes, if what you want is a desktop way to rewrite selected text in place. No, if what you want is a grammar score, as-you-type underlines, or a Mac and web checker. Lightphrase is a Windows tray utility: highlight, press Win+Ctrl+R, sweep the wheel. Grammarly is a writing assistant with an overlay and a checker.
Does Lightphrase check grammar as I type?
No. Lightphrase does not underline, and it does not score a document. Fix Grammar is a wheel action: you select the text, run the action, and the selection is replaced. If you need live checking while you type, Grammarly is the better tool.
Does Lightphrase work in any Windows app?
It works in any editable field, including Gmail, Slack, and browser forms. It copies the selection, generates a replacement, and pastes it back, then restores your clipboard. Read-only page text cannot be replaced. Grammarly's overlay covers many apps, but not every native field.
Is Lightphrase free?
While it is in early access, yes. The first 1,000 accounts get in; after that there is a waitlist. Every account gets 1,000 rewrites a day, resetting every UTC day. Signing in once arms the shortcut. Grammarly has a free checker and paid plans; we do not quote their prices here.
Does Lightphrase work on Mac?
Windows is available from the Microsoft Store. macOS and Linux are in development. Grammarly also runs on Mac and on the web.
Can I use Lightphrase and Grammarly together?
Yes. They do different jobs. Keep Grammarly for as-you-type checking in the browser. Use Lightphrase when you want to rewrite a selection in a Windows app without an overlay.
Rewriting that happens in place, not in another tab.
Lightphrase is free during early access. Download the Microsoft Store installer for Windows.