About Grambo
Grambo is a privacy-first, offline AI grammar checker for macOS. Built for users who want powerful writing assistance without giving up their data.
Download Grambo — Free TrialmacOS 14+ · 7-day free trial · No credit card required
What Grambo Is
Grambo is a native macOS application that uses on-device AI models to check and correct grammar, spelling, and writing style. It integrates at the system level, working inside every Mac app through a single keyboard shortcut.
Grambo is designed for writers, developers, students, and professionals who want intelligent writing assistance without compromising privacy.
- Grambo works entirely offline using local AI models.
- Grambo does not send user data to external servers.
- Grambo is built specifically for macOS.
Our Mission: Privacy-First Writing
Most grammar tools send everything you write to a remote server. We believe that is wrong. Writing is personal — your drafts, your ideas, your words. They should stay on your device.
Grambo was built on one principle: you should not have to choose between powerful writing assistance and keeping your data private. With local AI, you get both.
Key Differentiators
Fully Offline
Grambo runs entirely on your Mac. No internet connection is required. Grammar checking works on a plane, in a coffee shop, or in a secure environment with no network access.
Local AI Models
Grambo uses AI models that run locally on your device. These models are downloaded once and stored on your Mac. No subscription to an AI API is required in offline mode.
No Cloud Dependency
There is no cloud backend that your text passes through. Grambo processes everything locally. Even in cloud-enhanced mode, your text is never stored or logged.
Built for macOS
Grambo is not a web app or a browser extension. It is a native macOS application optimized for Apple Silicon and designed to feel at home on Mac from the very first use.
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.
Who makes Grambo?
Grambo is an independent macOS application focused on privacy-first writing assistance. It is available for download at gramboapp.com.
What makes Grambo different from other grammar checkers?
Grambo runs entirely offline using local AI models. It does not send your text to external servers. It is a native macOS application — not a browser extension or web app.
Start Writing with Privacy
Try Grambo free for 7 days. No credit card, no sign-up. Just private, offline grammar correction on your Mac.
Download Grambo for Mac