Multi-Cloud S3-Compatible Strategy: Avoiding Vendor Lock-In (2026)
Most teams assume they're portable because their app talks the S3 API. That assumption breaks the first time a cloud jacks up prices or you actually need to leave. The API was never the trap. Everything built on top of it is.
This is a practical guide to keeping the option to move, cheaply, without re-architecting your stack.
The Lock-In Problem: Where S3 Actually Traps You
S3 compatibility cuts both ways. Every vendor implements the core API, so your PutObject and GetObject calls port in theory. In practice, "portable in theory" falls apart two layers deeper, at the parts most teams never think about:
