Cloudflare R2 vs S3: Optimizing Egress Costs for VPS Hosting

Cloudflare R2 vs S3: Storage for VPS Hosting Apps

Cloudflare R2 challenges Amazon S3 in the VPS hosting market by eliminating egress fees for data sent to the public internet. This zero-egress model addresses the most common scaling bottleneck for applications serving user-generated content.

Why This Matters

While engineers often optimize for storage-per-gigabyte costs, the technical reality of VPS hosting is that data transfer out is the primary cost driver. Transitioning to zero-egress models like R2 provides cost predictability, but architectural success still depends on the specific bandwidth policies of the VPS provider and the latency between the compute and storage regions.

Key Insights

• Cloudflare R2 offers zero egress fees to the public internet, reducing costs for media-heavy VPS apps.
• S3 maintains dominance through advanced features like complex IAM policies and lifecycle replication patterns.
• R2 achieves S3-compatibility for core operations like CRUD and presigned URLs, facilitating easy migration.
• AWS CLI supports R2 via the —endpoint-url flag, preserving existing automation patterns for engineers.
• Performance for VPS apps is a function of internet paths between providers like Hetzner or Vultr and the storage endpoint.

Working Examples

Using AWS CLI with Cloudflare R2 by specifying a custom account endpoint.

aws configure set aws_access_key_id $R2_ACCESS_KEY_ID && aws configure set aws_secret_access_key $R2_SECRET_ACCESS_KEY && aws configure set region auto && aws s3 cp ./backup.tar.gz s3://my-bucket/backups/backup.tar.gz --endpoint-url https://<accountid>.r2.cloudflarestorage.com && aws s3 ls s3://my-bucket/backups/ --endpoint-url https://<accountid>.r2.cloudflarestorage.com

Practical Applications

• Media Hosting: Use R2 to serve public downloads without incurring S3’s variable egress costs. Pitfall: Ignoring VPS-side bandwidth limits which still apply regardless of storage provider.
• Automated Backups: Swap S3 for R2 in CLI-based cron jobs to stabilize monthly billing. Pitfall: Hardcoded AWS quirks in some third-party tools may break compatibility.
• Tooling Portability: Maintain the same automation patterns (cron jobs, systemd timers) while swapping backends via custom endpoint URLs.

References:

• https://dev.to/juan_diegoisazaa_5362a/cloudflare-r2-vs-s3-storage-for-vps-hosting-apps-4o09