data-api
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CryptoQuant
CryptoQuant is a crypto on-chain and market data analytics platform founded by Ki Young Ju that collects raw blockchain data, enriches it with exchange and entity labels, and delivers it as actionable metrics, charts, alerts and APIs. Often called 'the Bloomberg of crypto,' it serves professional traders, researchers and 200-plus institutional clients, and was the first on-chain data provider listed on CME Group's DataMine marketplace.
Polytomic
Polytomic is a San Francisco data-movement company that unifies ETL, Reverse ETL, and CDC streaming in a single platform, letting teams keep data warehouses, databases, and SaaS tools in sync without maintaining brittle one-off pipelines. Founded in 2019 by former PlanGrid engineers Ghalib Suleiman and Nathan Yergler and backed by Y Combinator, it pairs a no-code interface for business teams with SQL, monitoring, and infrastructure-as-code controls for data engineers.
Databento
Databento is a licensed market data provider that lets traders, quants, and developers pull live exchange feeds and decades of historical tick data through a single API with a pay-as-you-go model. Founded in 2019 by former quant hedge fund traders, it replaces the slow, expensive, contract-heavy process of buying market data with self-service access across 45+ trading venues and a unified data format.