abby is an open-source, self-hosted AI coding assistant that provides developers with a powerful alternative to GitHub Copilot. It allows teams to set up their own language model-powered code completion server without relying on external databases or cloud services. Tabby is designed for ease of integration with existing development environments through an OpenAPI interface and supports consumer-grade GPUs for enhanced performance. Its features include intelligent code suggestions, auto-completion, and natural language interactions, significantly boosting productivity for software development teams.