AWS Open Sources ExtendDB to Enable DynamoDB-Compatible APIs with Pluggable Storage

ExtendDB project offers a client-compatible DynamoDB API adapter supporting PostgreSQL backend to facilitate local and on-premises development.

By Nina Foster · Editorial pseudonym · 2026-05-20 · 1 min read

AI-ASSISTED REPORTING · RETROSPECTIVE ARCHIVE

Retrospective edition: 2026-05-20. Source published: 2026-05-20. Added to this archive: 2026-11-03. This briefing was prepared later from the linked announcement; it was not published on this website on the historical edition date.

AWS released version 0.1 of ExtendDB, an open source adapter that implements the Amazon DynamoDB API with pluggable storage backends, initially using PostgreSQL. This enables developers to run DynamoDB-shaped workloads locally, on-premises, or at edge sites without changing application code, addressing environments where the managed DynamoDB service is unavailable.

ExtendDB covers a broad range of DynamoDB operations including tables, items, and streams, with a modular architecture encouraging community contributions for additional storage backends. AWS maintains the project openly on GitHub under the Apache 2.0 license, promoting extensibility and fostering a wider ecosystem for DynamoDB-compatible applications.

Source & further reading

AWS announces ExtendDB, an open source DynamoDB-compatible adapter ↗

Source published 2026-05-20. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.