Blockchain infrastructure is the combination of hardware, software, and network components that allow a blockchain to record, validate, and store transactions without a central authority. It’s the foundation everything else in crypto sits on top of — from Bitcoin’s payment network to Ethereum’s smart contracts to the supply-chain and banking systems increasingly built on blockchain rails. Whether you’re comparing the most reliable or top-rated blockchain infrastructure providers, or just want blockchain for dummies, this guide breaks down what blockchain infrastructure actually consists of — including its technology stack, the different types available, and how it’s being used across industries in 2026.