Self-hosted apps that integrate with Confluent Cloud

3 open-source, self-hostable projects list Confluent Cloud as an integration.

• PeerDBSelf-hosted, open-source (AGPL-3.0) ETL tool streaming Postgres to ClickHouse and other warehouses via CDC, with a web UI and a Postgres-compatible SQL interface.
• GlassFlow ClickHouse ETLSelf-hosted, open-source stream processor that ingests data from Kafka and OTLP into ClickHouse with deduplication, filtering, and temporal joins.
• MarmotSelf-hosted, open-source data catalog and context layer: index tables, topics, queues and APIs with lineage, owners and a glossary, and serve it to AI agents.