AWS QLDB vs. Amazon Managed Blockchain

AWS offers multiple ways to store transactions securely and immutably. Two of the most intriguing are AWS Quantum Ledger Database (QLDB) and Amazon Managed Blockchain. At first glance, they might seem to do the same thing—store data in a tamper-proof way—but their underlying architectures, use cases, and strengths are very different. Let’s walk through what each service is, how they work, and when to choose one over the other. By the end, you’ll be able to confidently decide whether your project needs a centralized ledger or a distributed blockchain network.