PaletteBrain
FreeNative macOS app to use ChatGPT in any app. ($)
FreeFree tier
Outputs: text
About PaletteBrain
PaletteBrain is a native macOS app that gives you instant access to ChatGPT across all your applications and websites with a simple keyboard shortcut (⌥⌃Space). Instead of copying and pasting text between windows, you can select any text, press the shortcut, and run AI commands like fixing grammar, translating, summarizing, or converting content. The app uses your own OpenAI API key (with optional Microsoft Azure OpenAI integration for faster speed) and is available via a one-time purchase model — no recurring subscription fees. It aims to replace expensive tools like Grammarly, DeepL, Jasper, and Notion AI at a fraction of the cost.
Key Features
Global keyboard shortcut (⌥⌃Space) to access ChatGPT in any macOS app or website
Run AI commands on selected text: fix grammar, translate, summarize, convert to blog post, and more
Bring your own OpenAI API key for privacy and control
Microsoft Azure OpenAI integration for faster response times
One-time lifetime license, no recurring fees
Compatible with all apps: Notion, Google Docs, Slack, Discord, Gmail, etc.
Custom prompts and shortcuts for personalized workflows
Pros & Cons
Pros
- One-time payment — no subscription required
- Works across all macOS applications and websites
- Customizable shortcuts and AI prompts for efficiency
- Privacy-focused: uses your own OpenAI API key
- Cost-effective compared to multiple separate AI tools
Cons
- Requires an active internet connection and a paid OpenAI API key (average ~$2/month)
- macOS only — no Windows, Linux, or mobile support
- Future pricing may shift to $99/year subscription
Best For
Fix grammar and spelling errors in emails or documentsTranslate selected text to English or other languagesSummarize long articles or notes into bullet pointsConvert rough notes into well-structured blog postsGet coding assistance and problem-solving help without switching windowsReduce reliance on multiple paid subscriptions (Grammarly, DeepL, Jasper, Notion AI)
FAQ
How much does PaletteBrain cost?
PaletteBrain offers a lifetime license for a one-time payment of $29. There are no recurring subscription fees. You only need to provide your own OpenAI API key, which incurs usage-based costs (average ~$2/month).
Which apps and websites does PaletteBrain work with?
PaletteBrain works globally across any macOS app or website, including Notion, Google Docs, Slack, Discord, Gmail, and more. Any text you can select can be used as context for AI commands.
Do I need a ChatGPT Plus subscription?
No. PaletteBrain uses your own OpenAI API key, which is separate from ChatGPT Plus. You pay only for the API usage, which is typically much cheaper.