Another good option is Backyard AI, which is a text adventure and interactive storytelling tool. It works both online and offline and promises full privacy. Backyard AI includes a desktop app that runs AI models locally so you can control your data, and it supports a wide range of hardware. It's free to use, or you can pay $7 per month or $35 per month.
For a private AI chatbot, check out Private LLM. The app supports several open-source LLM models and works offline with no network connection. Private LLM can perform tasks like grammar correction, summarization and text expansion in multiple languages, and it's focused on privacy and security. It's available for both iOS and macOS.
If you want to customize and be productive, Bearly is a good option. The tool brings AI to your desktop on Mac, Windows and Linux, and you can use it to analyze documents, transcribe audio and summarize text. Bearly protects your data privacy with no query logging and user-owned encryption keys, and it supports multiple AI models for flexibility.