Cheshire Cat is a legitimate AI agent platform that goes beyond basic chatbots by offering a plugin development system and AGI-oriented features. It's designed for users who want more control and customization than typical SaaS solutions provide. The platform appears well-architected with a focus on extensibility through plugins.
While it's open source and free to use, it does require some technical knowledge to set up and customize effectively. The GitHub repository shows active development and a growing community, which is promising for long-term viability. For business users comfortable with self-hosting or having technical support, this could be a powerful alternative to proprietary solutions.