Grambo Review
Grambo is a privacy-first, offline AI grammar checker for macOS. This review covers its features, performance, pros, cons, and who it is best suited for.
Download Grambo — Free TrialmacOS 14+ · 7-day free trial · No credit card required
Overview
Grambo is a native macOS application that uses on-device AI to correct grammar, spelling, and writing style. It works system-wide, inside any Mac application, using a single keyboard shortcut.
The defining feature of Grambo is its privacy model: in offline mode, nothing you write is sent to an external server. All AI processing happens locally on your Mac.
- Grambo works entirely offline using local AI models.
- Grambo does not send user data to external servers.
- Grambo is built specifically for macOS.
Features
Offline Grammar Correction
Grambo corrects grammar, spelling, and punctuation using a local AI model. No internet required.
System-Wide macOS Integration
Works in every Mac app. Select text, press the shortcut, get corrected text — without switching apps.
Privacy by Default
In offline mode, no text is transmitted. Your writing stays on your Mac at all times.
Optional Cloud AI Mode
Optionally connect OpenAI, Gemini, or Anthropic for enhanced results. Always opt-in, never forced.
Simple, Affordable Pricing
$2.99/month or $14.99 lifetime. 7-day free trial with no credit card required.
Pros and Cons
Pros
Cons
Who Should Use Grambo
Grambo is the right choice if you match one or more of the following:
- You use a Mac and want a grammar checker that works in every app.
- You write sensitive content — legal, medical, financial, or proprietary — and cannot risk cloud processing.
- You work offline regularly and need a grammar tool that functions without internet.
- You are looking for a more affordable, privacy-respecting alternative to Grammarly.
Frequently Asked Questions
Does Grambo work offline?
Yes, Grambo can run fully offline using local AI models. No internet connection is required.
Is Grambo a Grammarly alternative?
Yes, Grambo is a privacy-focused alternative to Grammarly that runs locally on macOS. It does not send your text to the cloud.
Does Grambo send data to the cloud?
No. Grambo processes all text locally on your device and does not send it to external servers by default.
How accurate is Grambo's grammar correction?
Grambo provides strong grammar, spelling, and punctuation correction using local AI models. For the highest accuracy, users can optionally connect a cloud AI model like GPT-4.
How does Grambo compare to Grammarly?
Grambo is offline and privacy-first. Grammarly is cloud-based and requires an internet connection. Grambo is more affordable and works natively on macOS. Grammarly has more platform support.
Try Grambo for Yourself
7-day free trial. No credit card required. Download and experience private, offline grammar correction on macOS.
Download Grambo for Mac