
The Best Grammar Checker for Mac: A 2026 Guide
Find the best grammar checker for Mac. This guide explains how to choose a tool based on accuracy, privacy, local AI, and system integration for your workflow.
Choosing the right AI-powered macOS assistant can be a game-changer. This comparison breaks down IntelliBar and RewriteBar to help you decide which tool best fits your workflow.
IntelliBar is a native macOS app that provides access to multiple AI models (OpenAI, Anthropic, Google Gemini, and local models via Ollama) through a single interface. It offers a command menu, response comparison, and prompt completions, with a one-time $29 license plus usage-based fees paid directly to model providers. RewriteBar lives in your menu bar, offering a command-palette UI for instant grammar/spelling fixes, tone shifts, summarization/expansion, and translation into 30 languages. RewriteBar starts at $29 for a one-time license. An optional RewriteBar Gateway add-on ($5/month or $40/year) adds hosted models if you do not want to use your own API key.
What are the core features of IntelliBar and RewriteBar?
| IntelliBar | RewriteBar | |
|---|---|---|
Integration | Spotlight-like interface with command menu (⌘K) for quick access | Works in any macOS app via a menu-bar command palette (Cmd+Shift+P) |
PopClip Integration | No PopClip extension available | PopClip extension available for seamless text selection workflow |
AI Models | Published list is still GPT-4o, o1, o3-mini, Claude 3.5/3.7, Gemini 2.0, Grok, Llama, plus Ollama and custom endpoints | Subscription uses current OpenAI and Anthropic models on RewriteBar's backend; one-time license lets you choose from 37 providers |
Grammar & Style | Chat interface for text editing and tone adjustments | Grammar/spelling correction, tone adjustment via command menu |
Summarize & Expand | Chat interface supports summarization and text expansion | Summarize or expand selections on-the-fly |
Translation | Via chat interface (no preset language list) | Instant translation into 500+ languages and dialects |
Response Comparison | Send same prompt to multiple models and compare responses side by side | Single model response at a time |
Prompt Completions | Auto-completes prompts as you type | No built-in prompt completion |
Local Storage | Chat history stored locally on device | API key in Keychain; direct-to-provider; no RewriteBar servers for one-time license |
Privacy & Security | Direct connection to AI providers; no intermediaries; local model support | API key in Keychain; direct-to-provider; no RewriteBar servers for one-time license |
How does IntelliBar compares with RewriteBar in terms of Pricing and License?
| IntelliBar | RewriteBar | |
|---|---|---|
Free Trial | Available for evaluation | Free trial: 100 requests |
One-Time License | $29 (reduced from $49); usage-based fees paid to model providers | $29 Standard or $59 Pro, one-time |
Subscription | Not available | Optional Gateway add-on: $5/month or $40/year |
AI Service Costs | Pay providers directly; their site still quotes GPT-4o $0.50, Claude 3.5 $0.98, Gemini 2.0 $0.03 | BYOK on the license; optional Gateway for hosted models |
Download RewriteBar today and see why our users love RewriteBar over the competition. Start your free trial with no credit card required.
No credit card required • 100 free executions • Cancel anytime
All licenses include the full app. Pay once, then add extra devices or RewriteBar Gateway anytime.
Create a short RewriteBar demo, share it publicly, and get up to 100% of your purchase refunded.
Trial
Try it for free
Free
No credit card required
Standard
One-time license with cloud credits and API key support.
$29
USD
One-time payment
Pro
One-time license with RewriteBar Gateway Subscription for 1 year.
$59
USD
One-time payment
Extra devices or RewriteBar Cloud Subscription.
Extra Device
Add one Active Device to your license.
$19
USD
One-time payment
RewriteBar Gateway
Use RewriteBar Gateway as your AI provider without your own API key.
$40
USD
Billed annually
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Frequently Asked Questions
Yes. RewriteBar does not store or track any of your data. How your text is processed depends on the provider you choose:
The app is built using native macOS tools and is just ~20 MB in size — lightweight and privacy-focused.
Yes, RewriteBar works with almost any application or website that supports text input. It runs quietly in the background so you can stay focused and keep your writing flow.
Examples include:
RewriteBar App Interface is translated into 12 languages.
The translation action supports over 500 languages. However, language Support also depends on the selected model. State of the Art cloud models support most languages, while smaller local models can only support a limited number of languages.
If you encounter issues with a specific language, feel free to contact us.
One-Time License: Includes all RewriteBar features but requires you to set up your own API accounts with AI providers (OpenAI, Anthropic, etc.). You pay the providers directly for usage.
Subscription: Includes all features from the one-time license plus RewriteBar Gateway access and priority support. No need to set up API accounts—you can access the same AI models through our cloud service. You can still use your own API key (BYOK) or local models at any time.
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