# Amazon MemoryDB Documentation

Amazon MemoryDB is a fully managed, Valkey- and Redis OSS-compatible, in-memory database. It delivers ultra-fast performance and Multi-AZ durability for modern applications built using microservices architectures.

- [Developer Guide](/en_us/memorydb/latest/devguide/): Helps you understand the components and features, and how to use them. Learn how to access MemoryDB through a web-based GUI, command line tools, and the MemoryDB API.
- [API Reference](/en_us/memorydb/latest/APIReference/): Describes all the API operations for MemoryDB in detail. Also provides sample requests, responses, and errors for the supported web services protocols.

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