PaletteBrain

PaletteBrain is a macOS application that brings ChatGPT into any native app or website through a keyboard shortcut, so users can select text and run an AI command - like fixing grammar, translating, summarizing, or refactoring code - without switching windows or copying text elsewhere. Users create and bind their own custom commands with specific prompts and models, and can review past conversations from within the app. The app requires users to supply their own OpenAI or Microsoft Azure API key rather than charging a subscription for AI usage itself; the company reports that typical OpenAI costs run under $2 per month per user. PaletteBrain itself is sold as a one-time purchase - $29 for a single Mac or $99 for up to five devices under a family license - with lifetime access and no recurring fee for the app. PaletteBrain is built by Abruptive LLC, a self-funded company that describes itself as bootstrapped, operating under the name The Abruptive Institute. It works across macOS apps including Notion, Google Docs, Slack, Discord, and Gmail. It is macOS-only, with no Windows or Linux version, and processing happens directly between the user's machine and OpenAI or Azure rather than through Abruptive's own servers.