Amazon QLDB, Quantum Ledger Database, is an excellent offering for your financial transactions. Think a ledger in accounting terms. What makes QLDB so special is that its data is immutable, it can’t be changed or modified, and it’s cryptographically verifiable. It is not decentralized either, meaning that AWS fully manages the service, a central DB that you write to that is owned by Amazon.
Now onto Amazon Timestream, it is an offering for time series DB. These DB are used for data involving time. It is highly efficient and can store and analyze trillions of events per day, SQL compatibility, and scheduled queries. It even offers time analytics for identifying patterns in your time data. Timestream is most useful for real-time analytics.