Amazon S3 alternatives in 2026 split into two camps: S3-compatible cloud (Wasabi, Backblaze B2) that drops egress fees, and self-hosted engines (MinIO, RustFS, Ceph, SeaweedFS) that drop lock-in entirely. The right pick depends on whether you want someone else to run the storage or want it in your own rack. Below is a shortlist you can act on this...