SereneDB

SereneDB is an open-source search and analytics database that combines ultra-fast full-text search with fast analytics in a single engine. It is PostgreSQL- and Elasticsearch-compatible, allowing teams to keep their existing SQL drivers and Elastic clients while consolidating separate systems and eliminating the ETL between them. Released under the Apache 2.0 license, the project publishes its benchmark methodology and raw results, reporting 1B log indexing in under 8 minutes at roughly 10x less disk usage.