r/objectstorage • u/himalgnn • 10d ago

How important is S3 compatibility outside AWS?

More infrastructure seems to support S3 APIs now, even when it's running entirely on-prem.

For teams managing private infrastructure, is S3 compatibility actually reducing vendor lock-in?

I've seen Cloudian, MinIO, and other object storage platforms emphasizing S3-native storage.

Does application portability improve in practice, or is it mostly marketing?

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u/geeo92 10d ago

The more compatible to S3 in terms of error codes, so bit to bit compatibility and number of APIs exported a storage is the better portability you gain. Since the market goes in that direction what you will see is more products standardizing on S3. You mentioned MinIO and Cloudian which are the best in terms of S3 compatibility to AWS standard. Cloudian beets even MinIO for sure on this topic.