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QuestDB vs GreptimeDB: catalog facts
QuestDB	GreptimeDB
Freemium A free edition or tier is available. Additional features or hosted services require…	Freemium A free edition or tier is available. Additional features or hosted services require…
Self-hosted	Self-hosted
Supports time-oriented SQL queries Offers an open-source self-hosted edition	Handles time-series and related telemetry Supports object-storage-oriented deployments
Managed service and enterprise capabilities have separate terms.	Requires configuring data ingestion and the surrounding infrastructure.
Self-hosted	Self-hosted
Open source	Open source
License: Apache-2.0	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.