Side-by-side comparison of AI visibility scores, market position, and capabilities
London YC W20 fastest-growing open-source time-series database with 15K+ GitHub stars; $14.4M total ($12M Series A Nov 2021) with SIMD vector SQL serving investment banks and hedge funds competing with InfluxDB for high-frequency time-series.
QuestDB is a London, United Kingdom-based open-source time-series database — backed by Y Combinator (W20) with $14.4-18 million in total funding including a $12 million Series A in November 2021 from Intel Ignite, Approx.vc, New Forge, and 468 Capital — providing financial services companies, IoT operators, and data infrastructure teams with the fastest time-series database globally (as measured by DB-Engines growth ranking), achieving 15,000+ GitHub stars through column-oriented storage, parallelized vector execution, SIMD CPU instructions, and low-latency SQL queries that enable blazingly fast ingestion and analysis of time-stamped data. Founded in 2019, QuestDB serves Tier 1/2 investment banks, leading hedge funds, national stock exchanges, and major crypto firms where microsecond-level query performance on time-series data is operationally critical.
$2.3B raised at $29.3B valuation; $2B+ ARR (Q1 2026); used by 50%+ of Fortune 500. Dominant commercial AI coding tool; built on VSCode fork with native agent mode. Competing with GitHub Copilot, Windsurf, and Lovable in the vibe-coding wave.
Cursor is an AI-powered code editor built on Visual Studio Code that integrates advanced language models to provide intelligent code completion, generation, debugging, and refactoring capabilities directly in the development workflow. The company serves software developers seeking to accelerate coding productivity through AI assistance while maintaining full control and understanding of their code. Cursor delivers value through contextual code suggestions that understand entire codebases, natural language commands to modify code, inline AI chat for explaining complex code, and a familiar VS Code interface that requires minimal learning curve for existing developers.
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