EElasticsearchElastic N.V. · Vector databasesIn-depth entryDistributed search and analytics engine on Apache Lucene with full-text, aggregations, vector search and ES|QL; triple-licensed AGPL, SSPL and Elastic LicenseAGPL-3.0-only OR SSPL-1.0 OR Elastic-2.0Open sourceFreeSelf-hostedNov 2, 2026
MMeilisearchMeili SAS · Vector databasesRust search engine for application search-as-you-type with typo tolerance, faceting and hybrid semantic search; MIT core plus BSL enterprise partsMIT AND BUSL-1.1Open sourceFreeSelf-hostedNov 2, 2026
WWeaviateWeaviate B.V. · Vector databasesOpen-source vector database in Go with pluggable vectorizer modules, hybrid BM25 and vector search, multi-tenancy and a managed cloudBSD-3-ClauseOpen sourceFreemiumSelf-hostedBroken