ExtendDB: An open source DynamoDB-compatible adapter with pluggable storage
ExtendDB is an open source adapter compatible with Amazon DynamoDB, designed to work with various storage backends. It allows developers to run DynamoDB workloads in local and on-premises environments without cloud dependency. This initial release aims to facilitate development and testing for teams needing consistent access patterns across different infrastructures.
- ▪ExtendDB is released under the Apache 2.0 License and implements the DynamoDB wire protocol.
- ▪The first backend supported is PostgreSQL, enabling compatibility with existing AWS SDKs and tools.
- ▪It targets use cases where managed DynamoDB services are impractical, such as local development and air-gapped environments.
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Introducing ExtendDB: An open source DynamoDB-compatible adapter with pluggable storage backends by Lee Hannigan and Deepthi Mohan on 20 MAY 2026 in Amazon DynamoDB, Announcements, Intermediate (200) Permalink Share Today, we are announcing ExtendDB, an open source Amazon DynamoDB-compatible adapter with pluggable storage backends, released under the Apache 2.0 License. ExtendDB implements the DynamoDB wire protocol and ships with PostgreSQL as its first backend, so any AWS SDK, CLI, or tool that works with DynamoDB works with ExtendDB unchanged. In this post, we introduce ExtendDB, walk through getting started, and explain the architecture. This is a v0.1 release for development, testing, and experimentation.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Amazon Web Services.
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