KairosDB vs QuestDB
On the evidence we track, QuestDB leads this comparison with a composite score of 50/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for time-series databases. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
KairosDB
KairosDB is a time series database built on Cassandra that supports multiple cluster architectures with separated read and write paths, allowing efficient data management across distributed systems.
QuestDB
LeaderA specialized database engineered to ingest high-volume time-series data at speed, execute queries with minimal latency, and maintain queryable history across tiered storage layers—combining standard SQL with open file formats for portability.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
- Cassandra
KairosDB
- Graphite
- Telnet
QuestDB
Leader- PostgreSQL
- Parquet
- Arrow
- Polars
- Pandas
- Debezium
- Iceberg
- MySQL
- MongoDB
- Kafka
- Apache Parquet
- Apache Arrow
- Claude Code
- REST API
- Apache Iceberg
- Databricks
- AWS
- Azure
KairosDB or QuestDB: which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.