ParadeDB is described as 'Modern Elasticsearch alternative built on Postgres. Built for real-time, update-heavy workloads' and is a Search Server in the development category. There are more than 50 alternatives to ParadeDB for a variety of platforms, including Linux, Mac, Self-Hosted, Web-based and Windows apps. The best ParadeDB alternative is Algolia. It's not free, so if you're looking for a free alternative, you could try Algolia or Elasticsearch. Other great apps like ParadeDB are OpenSearch, Golem, Apache Solr and Manticore search.