Tantivy (written in Rust) uses MIT. I can't speak to the quality of the code, but their aim is to rewrite Lucene-type functionality as a Rust crate. https://gi

Tantivy (written in Rust) uses MIT. I can't speak to the quality of the code, but their aim is to rewrite Lucene-type functionality as a Rust crate. https://github.com/tantivy-search/tantivy https://github.com/tantivy-search/tantivy