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Dev tools · July 30, 2020

QuestDB

Fastest open source database for time-series and analytics

QuestDB launched on July 30, 2020 with 194 votes, #125 of 4,305 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 6 years on.

Visit questdb.com ↗QuestDB alternativestop 3% of July 2020

What it does

QuestDB is an open source database for time series, events, and analytical workloads with a primary focus on performance. https://github.com/questdb/questdb

QuestDB is the open-source time-series database for demanding workloads: ultra-low latency, high throughput, tiered storage, and fast SQL on open formats.

Capture large volumes of market data and trades, act on them in real time, and query the same complete history for pre-trade signals, research, TCA, risk, P&L, surveillance, and compliance. Standard SQL and open formats keep every team connected to the record. Ingest ticks, orders, executions, and transactions at market speed. Durability, deduplication, and out-of-order correction are built in. Compute intraday risk and P&L, evaluate surveillance conditions, and publish results while the market is moving. Run TCA, markouts, post-trade analysis, compliance, and historical research in SQL, then open the same data through Apache Parquet, Iceberg and Arrow. Capture large volumes of market data…from questdb.com

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