Document Indexing Software

Sphinx is an open source full text search server, designed with performance, relevance (search quality), and integration simplicity in mind. Sphinx lets you either batch index and search data stored in files, an SQL database, NoSQL storage.

Elasticsearch is an open source, distributed, RESTful search engine.

Logit.io provides complete observability of logs, metrics and traces. The platform also offers alerting & monitoring, as well as Prometheus, OpenSearch & Grafana. Ingest any type of data to see real-time insights about your applications and services

Try for free paid Free Trial $0.74 (per GB per day)

Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...

Search Engines

Xapian is an open source probabilistic information retrieval library, released under the GNU...