Various search databases and backends as alternatives to Elasticsearch.
- Sonic: https://github.com/valeriansaliou/soni
- Toshi: https://github.com/toshi-search/Toshi built on top of Tantivy: https://github.com/tantivy-search/tantivy
- Bayard: https://github.com/mosuka/bayard also built on top of Tantivy