Backblaze B2

Backblaze B2 provides the most affordable S3-compatible object storage at $6 per TB per month, which is 50% less than Amazon S3's standard tier and 70% cheaper than average encrypted alternatives. This no-frills service targets developers needing scalable backups, offering a 10GB free tier without upfront costs — distinct from pCloud’s lifetime models (#7). While it lacks client-side encryption and file syncing, a 2026 reliability report shows 99.999% uptime, making it the cheapest reliable option for high-volume data.