Elasticsearch is described as 'Unmatched relevance. Real-time insights. Anything is possible — when the precision of search meets the intelligence of AI' and is a popular Search Server in the development category. There are more than 50 alternatives to Elasticsearch for a variety of platforms, including Web-based, Linux, Self-Hosted, Mac and SaaS apps. The best Elasticsearch alternative is Apache Solr, which is both free and Open Source. Other great apps like Elasticsearch are Algolia, Meilisearch, OpenSearch and Manticore search.
Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and JSON APIs. Its major features include powerful full-text search, hit highlighting, faceted search, dynamic clustering, database integration, and rich document handling.
Algolia helps product teams connect their users with information by providing the building blocks they need to create fast, relevant, personalized search.
Its closed sourced and not possible to self-host.
One is application another is service you need to pay for
Meilisearch helps you shape a delightful search experience in a snap, offering features that work out-of-the-box to speed up your workflow.
OpenSearch is a community-driven, open source search and analytics suite derived from Apache 2.0 licensed Elasticsearch 7.10.2 & Kibana 7.10.2. It consists of a search engine daemon, and a visualization and user interface, OpenSearch Dashboards.
Open source search server designed to be fast, scalable and with powerful and accurate full-text search capabilities derived from Sphinx search project.
Vespa is an engine for low-latency computation over large data sets. It stores and indexes your data such that queries, selection and processing over the data can be performed at serving time.
Redisearch implements a search engine on top of Redis, but unlike other Redis search libraries, it does not use internal data structures like sorted sets.
Searchspring provides solutions for online retailers such as site search, personalization, merchandising, and insights. It's compatible with ecommerce platforms like Shopify, Magento, BigCommerce, and Miva.
Milvus is an open-source vector database built to power embedding similarity search and AI applications. Milvus makes unstructured data search more accessible, and provides a consistent user experience regardless of the deployment environment.
Measured Search provides a fully-managed personalized search & discovery service offering feature packed textual & relevance based search, contextualized recommendations combined with search & interaction analytics that enable you to increase conversions...
The Coveo Relevance Cloud™ is a market-leading AI-powered relevance platform. We aim to enable our customers to deliver the relevant experiences that we believe people expect in the new digital economy.
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Algolia is a great alternative if you don't want to spend time configuring your own server and just want something that works, fast.