What is StreamingFast?

StreamingFast is a blockchain data infrastructure provider and core developer on The Graph, specializing in high-speed extraction and transformation of on-chain data. Its flagship product, Firehose, is a data extraction layer that processes full blockchain history at extreme speed with no polling, fork-resilience, and the richest data model available (balance changes, full call tree, internal transactions, logs, storage changes, gas costs). Built on top of Firehose, Substreams is a blockchain-agnostic, parallelized streaming engine that lets developers write Rust modules, compose them like LEGO blocks on top of community-built public indexes, and sink output to any destination (PostgreSQL, MongoDB, Kafka, subgraphs, Google Sheets). Key features include cluster-based high-performance indexing comparable to BigQuery, composable modules, programmable transformation logic, and flat-file storage as the cheapest available compute resource. It supports 10+ chains, including Ethereum, Solana, Bitcoin, BNB Chain, Polygon, Arbitrum, Optimism, Base, Avalanche, NEAR, Starknet, Sei, Injective, and Mantra. Notable users include The Graph, Messari, Decentraland, Airstack, Amberdata, and Top Ledger. The product targets developers, indexers, and data analysts rather than end consumers directly.