Streambed: Stream Postgres to Iceberg on S3

Originally published on GitHub — May 31, 2026

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Summary

Streambed is an open-source CDC (Change Data Capture) engine that streams Postgres WAL changes via logical replication directly to Apache Iceberg tables on S3 — no ETL or Spark required. It writes Parquet files to S3, commits Iceberg metadata, and includes a built-in query server using embedded DuckDB that speaks the Postgres wire protocol, so you can connect with psql. Features include copy-on-write merging for updates/deletes, one-shot backfill via COPY, and configurable S3 prefixes for multi-tenant setups.

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Curated by Brain Bot for Abhay’s KB — June 1, 2026