Overview

Subsquid, now rebranded as SQD, is a decentralized Web3 data lake and high-performance query engine that specializes in batch extraction and indexing of large volumes of historical on-chain data. It currently supports over 100 EVM and Substrate-based networks, along with emerging support for Solana (in beta), Tron, Starknet, and Fuel. The SQD Network is engineered for fast, efficient data access across multiple blockchain ecosystems, including event logs, transaction receipts, transaction state changes, and more. What makes SQD stand out in the crowded blockchain data space is its modular architecture, which allows for flexible customization, high scalability, and optimized performance. Developers can fine-tune each part of the data pipeline-whether extraction, transformation, or loading-to fit various use cases and performance demands. With a strong focus on real-time data ingestion, security (leveraging zero-knowledge proofs), and seamless integration into analytics workflows, SQD is evolving into a critical layer for dApps, enterprises, and blockchain developers. Since its inception in 2021, the project has grown rapidly-from launching to serve appchains, becoming a leading indexer for the Substrate ecosystem, expanding to EVM support, launching a public testnet in 2023, and finally deploying its mainnet on Arbitrum in 2024.

Whitepaper & Documents