WillItSurvive
Data and analytics companies · United Kingdom

QuestDB

questdb.io ↗

Open-source database built for fast, high-volume time-series data.

Losing its protection
Assessed 21 July 2026 · Evidence as of 21 July 2026
The structural protection is eroding.
On the recordSince 21 July 2026 · Checkable from by mid-2027 · Every call on the record Checkpoint: Window closes on a Series B raise before an 18-month funding stall becomes visible
The call

QuestDB holds real financial-sector customers but is running years behind ClickHouse and KX in capital, headcount, and marketing reach.

QuestDB makes a specialized database designed to store and retrieve huge amounts of time-stamped data very quickly. It is used by trading firms and banks that need real-time performance. The company has real customers locked in by switching costs, but it is severely underfunded ($14.3 million raised versus ClickHouse's $650 million and KX's entrenched position), has a smaller engineering team, and stopped offering its own cloud service. The biggest threat is not technology but survival: KX benchmarks QuestDB by name to defend its market, ClickHouse has 45 times more money to spend, and every enterprise deal that goes to a competitor instead of QuestDB makes the funding gap harder to close.

Why
01
AI pressure: None apparent. AI tools don't replace a time-series engine; the pressure here comes from rival databases, not AI models. Could AI do the core job? Unlikely.
02
Bigger players: ClickHouse. ClickHouse, backed by $650M+ and valued near $6.35B, is pushing into time-series work while KX markets benchmarks beating QuestDB by name. Could a giant copy it? Probably.
03
What protects it. Live deployments inside B3, HDFC Bank, One Trading, and Brevan Howard create switching costs that don't vanish just because funding is thin.
What would change this call
QuestDB announces a Series B or later priced round within 12 months. Would show fresh capital to defend against better-funded ClickHouse and KX.
QuestDB headcount stabilizes or continues shrinking below ~28 people. Further contraction would signal stalled growth, not scaling.
A named capital-markets prospect QuestDB pursued is announced as a ClickHouse or KX customer instead. Would show direct customer loss to a better-funded rival.
Key numbers
  • $14.3M total funding, last round Nov 2021 (2021-11)
  • 28 employees, down 9.7% year over year (2026-06)
  • ClickHouse valued near $6.35B, 45x QuestDB's funding (2025-05)
Named risks
  • No priced funding round since Nov 2021 Series A, leaving QuestDB 45x under-capitalized versus ClickHouse. Severity: high
  • Headcount shrinking about 9.7% year over year to 28 employees as of June 2026. Severity: medium
  • QuestDB Cloud self-serve SaaS was discontinued, folded into Enterprise BYOC, reducing addressable self-serve revenue. Severity: medium
  • No public revenue or ARR disclosure makes monetization of marquee logos unverifiable. Severity: medium
  • KX actively marketing benchmark superiority by name against QuestDB in capital markets, its core vertical. Severity: high
Rivals, as read in July 2026
RivalDirectionEvidence
KX (kdb+/KDB-X)losing toKX published benchmarks Nov 2025 claiming kdb+ 3.36x faster than QuestDB on TSBS workloads
ClickHouselosing toClickHouse raised $350M in May 2025 at $6.35B valuation, over 45x QuestDB's total funding
TimescaleDB/TigerDatacontestingPostgreSQL-based rival rebranded TigerData in June 2025, competes for same open-source time-series users
InfluxDBcontestingCompetes directly in IoT and observability time-series segment as of 2026 comparisons
Questions people ask
Is QuestDB profitable in 2026?
No revenue figures are publicly disclosed for QuestDB as of mid 2026. The company is privately held with $14.3M total disclosed funding through a Series A closed in November 2021, and financial data remains gated as placeholders on CB Insights as of April 2024.
Has QuestDB raised a Series B?
No. As of June 2026, QuestDB's last priced round remains the $12M Series A led by 468 Capital in November 2021, over four years earlier, with no Series B or later round disclosed publicly.
Is QuestDB laying off staff?
Headcount sits at about 28 employees as of June 2026, down roughly 9.7% year over year according to Crustdata, with only one open role listed, suggesting contraction rather than active layoffs.
Who are QuestDB's biggest competitors?
QuestDB's main rivals are KX (kdb+/KDB-X), the entrenched proprietary capital markets database that published benchmarks in November 2025 claiming 3.36x faster performance, and ClickHouse, which raised $350M in May 2025 at a $6.35B valuation.
Can AI replace QuestDB's database engine?
No. AI coding agents can automate query writing and troubleshooting around databases, but the core low-latency storage and query engine is not LLM-replaceable. QuestDB shipped MCP interfaces and AI coding agent skills in 2025-2026 to complement, not replace, its engine.
Is joining QuestDB risky right now?
QuestDB has real production customers like B3, Brevan Howard (announced July 2026), and HDFC Bank (announced February 2026), but with only $14.3M raised since 2021, shrinking headcount, and web traffic down 15.4% quarter over quarter as of June 2026, funding stability is uncertain.
Timeline
  • 2026-07-16Brevan Howard announced as customer for systematic market data platform
  • 2026-06-30Full Parquet storage and native ARM64 builds shipped in v9.4.x/Enterprise 3.3.x
  • 2026-06-20Headcount reported at 28, down 9.7% year over year per Crustdata
  • 2026-05-14Won Best Trading Analytics Platform at TradingTech Insight Europe 2026 Awards
  • 2026-02-16HDFC Bank announced use of QuestDB for real time transaction monitoring
  • 2025-11-26KX published benchmarks claiming kdb+ 3.36x faster than QuestDB on TSBS
  • 2025-07-13QuestDB 9.0 Armed with Arrays released with N-dimensional arrays and materialized views 2.0
  • 2025-05ClickHouse raised $350M Series C at approximately $6.35B valuation
  • 2025-04-10One Trading announced adoption of QuestDB for low-latency trading platform
  • 2021-11QuestDB closed $12M Series A led by 468 Capital
Revision history
21 July 2026
First assessed. Losing its protection. The text above is fixed as of this date and is not edited afterwards.
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