If you're looking for a code editor that works with your existing extensions and themes and that puts a high priority on user privacy and security, Cursor is a great choice. It can import your existing extensions and themes with "Import Extensions." It also has a strong privacy and security focus with a privacy mode, SOC 2 certification and the ability to host your own API key. It has three pricing tiers, including a Hobby tier that's free.
Another contender is Tabnine, an AI-powered code assistant designed to make software development easier without compromising your code's privacy and security. It supports many programming languages and IDEs, including VS Code and IntelliJ, and lets you customize it with your own settings by training AI models on your own codebase. Tabnine also offers a free plan and a Pro plan with more customization and enterprise-level security.
If you need a flexible, customizable AI coding assistant, Refact is another good choice. This open-source tool supports multiple Large Language Models and offers code completion, code refactoring tools and a chat interface for asking coding questions. It's designed to protect user privacy with self-hosted versions and customizable privacy settings, so it's good for personal and enterprise use.
Last, CodeComplete is geared for enterprise customers and offers a self-hosted option with a lot of features. It protects code and data with on-premise or VPC deployment and relies on permissively-licensed repositories to sidestep legal issues. CodeComplete also has customized pricing for individuals and enterprises, so it's adaptable and secure.