QuestDB

InfluxDB

influxdata/influxdb

Popular

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

TimescaleDB

timescale/timescaledb

Popular

Postgres extension for time-series and real-time analytics with hypertables and compression, by TigerData.

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.

GreptimeDB

GreptimeTeam/greptimedb

Rising

Cloud-native observability database unifying metrics, logs and traces on object storage.

TDengine

taosdata/TDengine

Time-series database optimized for industrial IoT with built-in caching, streaming and compression.