Apache Solr

Mature open-source enterprise search platform.

About Apache Solr

Apache Solr is open source, is free to use and can be self-hosted.

People switching from Elasticsearch often consider Apache Solr.

Apache Solr is an alternative to

ElasticsearchSee all Elasticsearch alternatives

Similar to Apache Solr

AlgoliaHosted search and discovery API.
Manticore SearchOpen-source search database, a fork of Sphinx.
MeilisearchFast, typo-tolerant open-source search engine.
OpenSearchOpen-source search and analytics suite (Linux Foundation).
TypesenseOpen-source, typo-tolerant search engine.

Listed for information; LaunchStall isn’t affiliated with Apache Solr. The quoted description comes from solr.apache.org. Features and plans change — check the official site for current details.