Comparison

QuestDB vs GreptimeDB

QuestDB and GreptimeDB both land on Depends.

QuestDB

Depends

Confidence: Medium

Buy if you run high-volume time-series workloads like market data or sensor streams and can self-host.

Depends

Confidence: Low

Buy if you're a platform team handling metrics, logs, and traces at real scale and want open source with SQL/PromQL.

QuestDB versus GreptimeDB
Compare	QuestDB	GreptimeDB
Verdict	Depends	Depends
Best for	High-ingest market data and trading	Platform teams at scale
Who it's not for	General-purpose app data that isn't time-series	Small teams that just need basic metrics dashboards
Privacy	One low-severity XSS vulnerability in the web console (CVE-2026-0824), publicly disclosed; no breach history found in sources.^⁷	No known public vulnerabilities found in the sources reviewed.¹²
Support quality	No reliable evidence on support experience	No user evidence available
Public sentiment	A small but positive user base consistently praises raw ingestion speed and SQL simplicity over rivals like InfluxDB.^¹	Public user feedback is scarce; the only direct comment found is a brief positive social post with no verifiable detail.¹³
Biggest gotcha	QuestDB Cloud discontinued on AWS Marketplace; managed path unclear . expect self-hosting or Enterprise^⁶	Open-source core, but cloud/managed pricing isn't published . expect a sales call before budgeting¹¹