IBM CDC Replication vs pgstream

IBM CDC Replication has no write-up on Specifiction yet; its figures are above.

pgstream is a free, open-source tool for moving PostgreSQL data and schema changes to other systems. Run it as a command-line program or embed it as a Go library; it is self-hosted and requires PostgreSQL. Destinations include PostgreSQL, Elasticsearch or OpenSearch, Kafka, and webhooks. It can take an initial or on-demand snapshot for bulk loads and point-in-time copies, and tracks schema changes so receiving systems can reflect table updates. During replication, column values can be transformed with greenmask, neosync, go-masker, or custom transformers, including to mask production data headed for development or staging. Kafka support includes schema-based partitioning. Installation options include a Go binary, building from source, and Homebrew on macOS or Linux. The project uses the Apache License 2.0 and costs nothing. Its initial release has constraints: one Kafka topic, the wal2json PostgreSQL plugin, no row-level filtering, and a primary-key or unique non-null column requirement. Community questions and issues go through GitHub issues.