Grammar Checker & AI Writing Assistant for Mac
Fix grammar mistakes instantly with Stanza’s intelligent grammar checker. Get grammar correction, spelling fixes, and style improvements everywhere you type. Private by default, blazing fast, and works offline. Prefer zero setup? Enable Stanza Cloud.
How to Use Stanza
Get started in seconds. Perfect writing is just a keyboard shortcut away.
Write Anywhere
Stanza works seamlessly across all your Mac applications.
Select Text
Select the text you want to check for grammar.
Press the Shortcut Key
⌘ ⇧ G
Perfect Writing
Apply fixes automatically and write with confidence.
Powerful Features for Perfect Writing
Offline by default for privacy and speed. Optional Cloud mode for non-technical users who want zero setup.
Grammar Correction
Instantly detect and fix grammar mistakes with AI-powered suggestions tailored to your writing style.
Spelling & Punctuation
Catch typos, spelling errors, and punctuation mistakes before they reach your audience.
Style Enhancement
Improve clarity, conciseness, and readability with intelligent style recommendations.
Real-Time Analysis
Instant results with on-device processing. Enable Stanza Cloud mode only if you prefer zero setup.
Privacy First
Your writing stays on your Mac by default. Nothing is sent to our servers unless you enable Stanza Cloud.
Native Mac App
Beautiful, lightweight interface designed specifically for macOS with dark mode support.
More Power When You Need It
Stanza runs offline on your Mac by default for maximum privacy and speed. For extra flexibility, you can enable Stanza Cloud (instant setup) or connect your own API keys for premium models.
Bring Your Own Key
Use your own API keys from OpenAI, Anthropic, or Google. No middleman, just you and the provider.
Access Premium Models
Use premium models by GPT, Claude and Gemini directly within the app.
Your Keys Stay Private
Stored securely in your Mac's keychain. We never see or access them.
Switch Instantly
Toggle between local and cloud models with one click.
Default: 100% Offline – Stanza runs locally on your Mac for maximum privacy and speed. Nothing is sent to our servers unless you enable Stanza Cloud. You can also use BYOK to connect premium models with your own keys.
📖 Learn how to get your own API keys from OpenAI, Anthropic, or Google →
Works Seamlessly Across Your Mac
Zero configuration required. Begin typing anywhere, and receive real-time grammar assistance instantly.
Safari
Chrome
Mail
Messages
Slack
Notion
Word
Pages
Notes
Telegram
WhatsApp
Discord
Obsidian
Bear
Supporting 90+ Global Languages
Write with confidence in any language, powered by advanced AI
Simple, transparent pricing
Stanza is offline by default for privacy and speed. Choose Monthly for Stanza Cloud + Offline + BYOK, or Lifetime for Offline + BYOK.
Monthly
Best for Stanza Cloud (instant setup)
- ✓ Stanza Cloud (instant setup)
- ✓ Offline AI processing
- ✓ Bring your own API key
- ✓ All grammar checking features
- ✓ Works across all apps
- ✓ 90+ languages support
- ✓ Cancel anytime
- ✓ Use on up to 3 devices
Lifetime
Pay once, use forever
- ✓ Offline AI processing
- ✓ Bring your own API key
- ✓ All grammar checking features
- ✓ Works across all apps
- ✓ 90+ languages support
- ✓ All future updates included
- ✓ No recurring payments
- ✓ Use on up to 3 devices
- ✗ Stanza Cloud not included
Stanza runs offline by default. Stanza Cloud is optional and available with the Monthly plan. Upgrade anytime after your 7-day free access.
Frequently asked questions
Can't find the answer you're looking for? Feel free to send us an email at support@stanza-app.com
How does Stanza protect my privacy?
Stanza is private by default. Everything runs locally on your Mac for maximum privacy and speed. We don’t send your writing to our servers unless you enable Stanza Cloud.
Which applications are supported?
Stanza integrates with virtually all Mac applications—from Mail and Messages to Safari, Chrome, Pages, Word, Slack, Notion, and countless others.
What are the system requirements?
You'll need macOS 14.0 or newer running on Apple Silicon (M1/M2/M3 chips). 8GB RAM is typically sufficient for smooth performance.
Can I try before purchasing?
Yes! Download Stanza and enjoy 7-day free access. Offline mode works instantly, and you can enable Stanza Cloud anytime if you prefer zero setup.
What's included with lifetime access?
Lifetime access covers all updates, bug fixes, and feature additions within the current major version. Our commitment is to continuously improve your experience.
What is Stanza Cloud?
Stanza Cloud is an optional mode that gives you instant setup with no local downloads or API keys. Your writing stays on your Mac by default, and only selected text is processed when you choose to use Cloud mode.
How do I get my own API keys for BYOK?
Getting your own API keys is easy! You can obtain them directly from OpenAI, Anthropic (Claude), or Google (Gemini). Read our step-by-step guide to learn how to get API keys and set them up in Stanza.
How do I set up Local AI models in Stanza?
Setting up Local AI is simple with our auto setup feature! Choose "Local AI" as your service type in Settings, select your preferred model (Llama 3.2 3B or Qwen 3 1.7B), and click the Auto Setup button. Read our complete Local AI setup guide for detailed instructions, model comparisons, and troubleshooting tips.
Transform Your Writing Today
Trusted by thousands of Mac users for flawless, polished writing every day.
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