SubQuery is a data-as-a-service provider that aggregates and organises data from Polkadot and Substrate projects, serving up well-structured data for developers to use for a wide array of projects. It operates between the layer-1 blockchains (Acala etc) and decentralised apps (dApps). This service allows DApp developers to focus on their core use case and front-end, without needing to waste time on building a custom backend for data processing.
SubQuery allows every Substrate/Polkadot team to process and query their data. The project is inspired by the growth of data protocols serving the application layer and its aim is to help Polkadot/Substrate projects build better dApps by allowing anyone to reliably find and consume data faster. Today, anyone can query and extract Polkadot network data in only minutes and at no cost.