Backblaze B2 vs Self-Hosted S3: Cost Crossover Hits Around 7 TB

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A 2026 cost analysis compares Backblaze B2 cloud storage against self-hosted S3-compatible solutions like RustFS and MinIO. Backblaze B2 charges approximately $6.95 per TB per month with free uploads and free egress up to three times monthly stored capacity, making it straightforward to budget for small workloads. Below roughly 7 TB, B2 is typically cheaper due to zero infrastructure overhead, but self-hosted solutions become significantly more economical beyond that threshold, saving up to 74% at 500 TB scale. B2 is well-suited for backups, archives, and media libraries, though it lacks support for IAM roles, object tagging, ACLs, and lifecycle tier transitions. Organizations with heavy egress demands or large data volumes above 10 TB may find self-hosted deployments offer a substantially lower total cost of ownership.

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