Codeium · Free AI Code Completion & Chat
codeium.com
Codeium offers best in class AI code completion, search, and chat — all for free. It supports over 70+ languages and integrates with your favorite IDEs, with lightning fast speeds and state-of-the-art suggestion quality.

Rapid code autocomplete In-editor AI chat assistant Unlimited usage Trained on permissive data Support via Discord Encryption in transit

free99 tier available

seems quite competitive if not better in some regards to copilot

https://github.com/Exafunction/codeium.vim