BetterPhrase vs Grammarly
BetterPhrase vs Grammarly
Offline rephrasing that stays on your Mac.
Grammarly is a great grammar checker. BetterPhrase is something different: a rephrasing tool that runs entirely on your device: no internet required, no subscription, no data sent to the cloud.
Try BetterPhrase free for 30 days →No credit card. Apple Silicon only (macOS 14+).
Grammarly
Cloud-based
The leading cloud-based writing assistant. Catches grammar errors, flags unclear sentences, checks plagiarism, and integrates with hundreds of apps. Works on any OS and sends your text to Grammarly's servers for processing.
BetterPhrase
Local-first · Mac only
A Mac-native rephrasing tool that runs a fine-tuned language model on your Apple Silicon chip. Select text in any app (Slack, Mail, Notion, VS Code): a panel appears, you pick a tone, and it rewrites inline. Nothing leaves your Mac.
They solve adjacent problems. If grammar correction is your priority, Grammarly wins. If you want inline rephrasing that's private, offline, and paid once. BetterPhrase is built for that.
Feature Comparison
Side by side
| Feature | BetterPhrase | Grammarly Pro |
|---|---|---|
| Pricing model | $19.99 one-time | $12/mo (annual) = $144/yr |
| Works offline | Yes: fully local | No: requires internet |
| Text sent to servers | Never | Yes (processed in cloud) |
| Inline rephrasing (any app) | Yes: Slack, Mail, Notion, VS Code, anywhere | Via browser extension only |
| Tone modes | Formal, Casual, Concise, Expand | Tone suggestions (advisory) |
| Grammar correction | No | Yes (core feature) |
| Plagiarism check | No | Yes (Pro plan) |
| Full AI rewrite | Yes (inline rewrite) | Yes (Pro) |
| macOS native app | Yes: Apple Silicon, macOS 14+ | Yes, but cloud-dependent |
| Windows / Linux support | No | Yes |
| Free trial | 30-day free trial | Free plan (limited AI prompts) |
| Account required | No | Yes |
| Model runs on device | Yes | No |
Why BetterPhrase
Three key reasons to choose BetterPhrase
Your text never leaves your Mac.
Grammarly processes your writing on its servers. That's fine for most content, but not for confidential client emails, legal documents, internal memos, or anything you wouldn't want stored on a third-party server.
BetterPhrase runs a fine-tuned model on your Apple Silicon chip. The text you select never touches the internet. There's no API to intercept, no server to breach, no policy to read.
It works anywhere on your Mac, including offline.
Grammarly's browser extension works in Gmail, Google Docs, and web apps. Its desktop app extends to a few native apps. BetterPhrase works in every macOS application: highlight any text, anywhere, and the panel appears. That includes Mail, Sketch, and any environment where Grammarly's extension can't run.
It also works on a plane, in a basement, and anywhere without a reliable connection.
One payment, not a subscription.
Grammarly Pro costs $144 per year billed annually. Over three years, that's $432. BetterPhrase costs $19.99 once. No renewal, no cancellation to remember, no price increase next quarter. You pay once and the app is yours.
The founding member price is $13.99 for the first 200 customers.
Pricing
The cost over time
| BetterPhrase | Grammarly Pro | |
|---|---|---|
| Year 1 | $19.99 (one-time) | $144 |
| Year 2 | $0 | $144 |
| Year 3 | $0 | $144 |
| 3-year total | $19.99 | $432 |
Grammarly pricing verified July 2026 (grammarly.com). Month-to-month Grammarly Pro costs $30/month = $360/year.
Honest verdict
Who should pick which
Choose Grammarly if:
- Grammar and spelling correction is your primary need
- You work across Windows, Android, or non-Mac devices
- You use web apps heavily and want a browser extension
- You need plagiarism detection
- You write in multiple languages
Choose BetterPhrase if:
- You need to rephrase tone and style, not just fix grammar
- Privacy matters: you handle client, legal, or sensitive content
- You work on a Mac and want something that works in every app
- You travel or work offline regularly
- You're done paying subscription fees for tools you use daily
BetterPhrase: try it free for 30 days.
No credit card. Enter your email and you'll get a one-line install command for macOS. Apple Silicon (M1+), macOS 14+ required.
Start your free trial →Founding member price: $13.99 one-time for the first 200 customers. Regular price $19.99.