Infra & metrics

QuestDB

QuestDB

Columnar, very-high-throughput SQL time-series DB for finance/IoT/ad-tech — and a fast store for infra metrics if you wire it behind Prometheus.

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Category
Infra & metrics
License
Open core
Deployment
SaaS or self-hosted
Cost
Low
Free tier
Yes
Self-host effort
Moderate
Maturity
Established
Popularity
≈17k GitHub stars

The catch

It's a raw-performance database, not a monitoring product — no agents, dashboards or alerting, so for infra you still bolt on Prometheus/Grafana; HA is paid-tier.

Monitors

MetricsServers

Built for

Developers

Alternatives & comparisons

TimescaleDB QuestDB vs TimescaleDB →
InfluxDB QuestDB vs InfluxDB →