CielChan

CielChan is a desktop AI companion that runs entirely offline on your Windows PC. You talk to it by voice or text, and it responds with an animated avatar that shows emotions and lip-sync. It remembers your conversations over time, so interactions feel more personal and familiar. The software doesn't require accounts, subscriptions, or an internet connection — everything processes locally.

Beyond simple chat, CielChan offers several distinctive features. It can read TXT and EPUB books aloud with narration, summarize content, and switch to a quiet ambient presence. The companion is context-aware: it monitors your active windows and can make subtle comments based on what you're doing — coding, gaming, watching media. You can also connect it to live streams on Twitch, YouTube, and TikTok so it interacts with chat in real time. For multiplayer, there are shared rooms where users and their companions can chat together or run debate sessions. Mini-games like Tic-Tac-Toe are included. Advanced users can customize the avatar using VRM models and load their own local GGUF AI models or use cloud providers like OpenAI and Anthropic.

This tool is aimed at people who want a consistent, private AI companion on their desktop — whether for casual conversation, productivity support, or just background company. Remote workers might use it during focus sessions with timed check-ins and ambient soundscapes. Gamers can have it react to in-game events and chat across streaming platforms. The one-time purchase model and offline privacy make it appealing for those wary of subscriptions and data uploads.