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
GGrafanaGrafana Labs · Monitoring & observabilityIn-depth entryDashboarding and alerting platform that visualizes metrics, logs and traces from Prometheus, SQL databases and dozens of other data sourcesAGPL-3.0-onlyOpen sourceFreemiumSelf-hostedNov 2, 2026
OOpenSearchOpenSearch Software Foundation (Linux Foundation) · Vector databasesApache-2.0 search and analytics suite forked from Elasticsearch and Kibana, governed by the OpenSearch Software FoundationApache-2.0Open sourceFreeSelf-hostedBroken