Cotabby
Write at the speed of thought. In any app.
Free Writing Assistance Open Source
Overview
Cotabby is an open-source AI autocomplete tool for macOS that provides inline ghost-text suggestions as you type across any app. All inference runs entirely on your Mac with no cloud connectivity — using Apple Intelligence, open-source GGUF models, or custom models. Works in Mail, Notes, Chrome, Outlook, Gmail, iMessage, Notion, Discord, Slack, and most standard macOS text fields.
Minimum macOS: 15.0 (Sequoia)
Architecture: Apple Silicon
Key Features
- Inline ghost-text suggestions accepted with Tab
- Fully local — no cloud, no subscriptions
- Apple Intelligence, GGUF, or custom model support
- Works across native and web-based macOS apps
- Adjustable suggestion length (3–20 words)
- Speed-optimized (0.4 GB) or balanced (1.1 GB) models
