If you're looking for an AI-powered code completion tool that spans multiple programming languages, Codeium is a top contender. It offers code completion, search and chat abilities for more than 70 programming languages, along with AI-powered search, code generation and refactoring abilities for individuals and teams. It also has data protection features like encrypted data transfer and SOC2 Type 2 compliance, so you can trust it with your code.
Another top contender is GitHub Copilot, which offers context-aware help in all stages of development. It can offer code completion based on the project's context, but also can turn natural language prompts into code suggestions. GitHub Copilot works with many IDEs and terminals, supports multiple programming languages and dovetails with other GitHub tools to help you get more done and write better code.
Tabnine is another AI-powered code assistant that supports many programming languages and IDEs. It can offer personalized code completions based on your own coding patterns and offers AI chat support for the entire development lifecycle. Tabnine protects code privacy by storing it only with your consent and offering custom installation options, so it's good for solo developers and large teams.
For an open-source option, you might want to check out Refact. It supports several large language models, and it's got features like fast code completion, code improvement tools and a built-in chat. Refact prioritizes user privacy with self-hosted options and adjustable privacy settings, so it's a good option for developers who want to keep their code and data under their own control.