TimescaleDB

pgvector

pgvector/pgvector

Popular

PostgreSQL extension for vector similarity search with HNSW and IVFFlat indexes; vectors next to your data.

PostGIS

postgis/postgis

Popular

Spatial extension that makes Postgres the standard open-source geospatial database.

Citus

citusdata/citus

Extension that distributes Postgres tables across nodes for horizontal scale-out; powers Azure Cosmos DB for PostgreSQL.

pg_duckdb

duckdb/pg_duckdb

Rising

Embeds DuckDB in Postgres for fast analytical queries over tables and Parquet/Iceberg files.

ParadeDB

paradedb/paradedb

Rising

Postgres extensions for Elasticsearch-quality BM25 full-text and hybrid search inside your database.

PgBouncer

pgbouncer/pgbouncer

Popular

Lightweight connection pooler for Postgres, standard in front of busy or serverless workloads.

InfluxDB

influxdata/influxdb

Popular

Popular purpose-built time-series database; v3 is rebuilt in Rust on Apache Arrow, DataFusion and Parquet.

Prometheus

prometheus/prometheus

Popular

CNCF monitoring system and time-series database with pull-based scraping and PromQL.

VictoriaMetrics

VictoriaMetrics/VictoriaMetrics

Rising

Fast, resource-efficient Prometheus-compatible time-series database and monitoring stack.