Smaller alternatives to Elasticsearch without all the features

valeriansaliou/sonic: 🦔 Fast, lightweight & schema-less search backend. An alternative to Elasticsearch that runs on a few MBs of RAM.

quickwit-oss/tantivy: Tantivy is a full-text search engine library inspired by Apache Lucene and written in Rust.

meilisearch/meilisearch: A lightning-fast search engine that fits effortlessly into your apps, websites, and workflow.

nathell/smyrna

zinclabs/zinc: ZincSearch. A lightweight alternative to elasticsearch that requires minimal resources, written in Go.

Manticore: a faster alternative to Elasticsearch in C++ with a 21-year history

Vespa.ai “store, search, organize and make machine-learned inferences over big data at serving time.”

Commercial offerings