Topic
Egress and data residency
Cloud egress is the silent line on a data-pipeline bill. AWS charges roughly $0.09/GB out to internet for the first 10TB; GCP and Azure are in the same range. A 1TB/month workload egressing cross-region adds roughly $90/month to the pipeline cost. 2026 residency rules force in-region processing for several regulated workloads.source - pulled 2026-06-21
Where egress shows up
- › Source in one cloud, warehouse in another: cross-cloud egress on both sides.
- › Pipeline vendor in a different region than the warehouse: in-cloud cross-region egress.
- › Reverse-ETL writes back into a SaaS hosted in another cloud: out-to-internet egress.
What 2026 residency rules force
EU and UK regulators tightened residency requirements for several categories in 2026. Healthcare and financial-services workloads frequently must keep raw data within a region. The pipeline architecture implication: pick a vendor that supports in-region processing (BYOC on Estuary, Enterprise Flex on Airbyte) rather than routing through the vendor's default region.
Related
Written by Oliver Wakefield-Smith, Founder of Digital Signet. Independent reference, no vendor sponsorship.
Sources logged at /sources. Pricing-change history at /changelog. Last reviewed 2026-06-21.