Cai

Press ⌥C on anything to run smart actions, locally

Cai Introduction

Cai is a free, open-source AI action layer for macOS that enables users to execute smart actions like AI prompts, shell scripts, and integrations with tools such as GitHub and Linear using a simple keyboard shortcut (⌥C). It operates entirely locally with built-in AI models, ensuring data privacy, offline functionality, and no cloud dependency. Designed to minimize app switching, it enhances productivity by providing instant access to custom actions directly from any selected text or image.

Key Features

Local AI processing with bundled Ministral 3B and support for HuggingFace MLX models, Ollama, LM Studio, and Apple Intelligence
Keyboard-first activation via ⌥C shortcut on any selected text or image for instant action execution
Custom action creation for shell commands, AI prompts, URL shortcuts, and integrations with tools like GitHub and Linear
Image-to-text extraction and processing capabilities, including OCR from screenshots
100% local operation with no cloud, accounts, or telemetry, ensuring complete privacy and offline use

Use Cases

Developers can quickly run shell scripts or debug errors by selecting text in terminals without switching apps
Productivity enthusiasts can summarize, translate, or reformat text from emails, documents, or chat messages using AI prompts
Project managers can create GitHub issues or Linear tickets from copied text or screenshots to streamline task management
AI hobbyists can experiment with local AI models for custom prompts, data analysis, or creative tasks on selected content
Content creators can extract text from images via OCR and perform actions like summarization or translation for efficient workflow

Why Startups Use It

Startups need Cai to enhance productivity by automating repetitive tasks and integrating with essential tools like GitHub and Linear, reducing manual effort and app switching. Its local processing ensures data security and compliance, which is critical for protecting sensitive information in early-stage companies. Additionally, being free and open-source helps startups minimize costs while offering customizable actions that adapt to evolving workflows.

Alternative Options

Alfred, Keyboard Maestro, Raycast, Automator, PopClip

Frequently Asked Questions

Is Cai free to use?

Yes, Cai is completely free and open-source under the MIT license, with no hidden costs, subscriptions, or required accounts.

Does Cai require an internet connection to work?

No, Cai runs 100% locally on your macOS machine, so it functions offline and keeps all data private without any cloud dependency.

How do I install Cai on macOS?

You can install Cai easily via Homebrew by running the command: `brew tap cai-layer/cai && brew install --cask cai` from your terminal.

What AI models does Cai support for local processing?

Cai supports bundled Ministral 3B for zero-setup local AI, any HuggingFace MLX model optimized for Apple Silicon, and connections to Ollama, LM Studio, Apple Intelligence, or OpenRouter for flexibility.