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⚡ Zero-Egress Economics Model

Cloudflare R2 vs AWS S3 Total Cost Calculator

Stop paying AWS $0.09/GB in internet egress fees. Model storage at rest, high-volume download bandwidth, Class A & B request velocity, and discover how Cloudflare R2's $0.00 egress policy slashes monthly storage invoices by 40% to 92%.

SCENARIO PRESETS:

⚙️ Storage & Egress Parameters

2026 Production Tariffs
Total Storage at Rest 50,000 GB (50.0 TB)
AWS S3 Standard ($0.023/GB) vs Cloudflare R2 ($0.015/GB). 10 GB free tier on R2.
Outbound Internet Egress Bandwidth 150,000 GB (150.0 TB / 3.0x Ratio)
AWS charges $0.09/GB for external downloads. Cloudflare R2 egress is 100% FREE ($0.00).
Cloudflare Edge Cache Hit Ratio 65% Cached at Edge
Cached responses reduce Class B read operations hitting the underlying storage bucket.
💡 Financial Strategy Analysis

At 150.0 TB outbound egress, AWS S3 charges $13,500.00/mo just for bandwidth. Switching to Cloudflare R2 eliminates 100% of egress charges, saving you $13,900.00 every month and paying back migration costs in under 2 weeks.

📊 Financial Comparison & Net Savings

Live Reactive Engine
AWS S3 Monthly Spend
$14,678.50
Storage + Egress + Ops
Cloudflare R2 Monthly Spend
$772.55
Storage + Operations ($0 Egress)
Net Monthly Cash Savings
$13,905.95
94.7% Bill Reduction
Migration Payback Period
0.4 Months
Full ROI in 13 days
📈 Monthly Cost vs Outbound Egress Volume
AWS S3 ($0.09/GB)
Cloudflare R2 ($0.00)
Billing Dimension AWS S3 Standard Cloudflare R2 Monthly Delta
Storage at Rest $1,150.00 $749.85 -$400.15
Outbound Egress Bandwidth $13,500.00 $0.00 (FREE) -$13,500.00
Class A Operations (Write/List) $12.50 $6.75 -$5.75
Class B Operations (Read/Head) $16.00 $10.80 -$5.20
Total Monthly Invoiced Spend $14,678.50 $767.40 -$13,911.10 / mo 

      


    

  
    
    
    
    

      

        

          
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Verified across 122 community production token & cost audits

          

        

        

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Deep Architectural Analysis: The Cloudflare R2 vs AWS S3 Economics Paradigm

      

        Across developer forums like r/webdev, r/selfhosted, and r/node, AWS S3 egress pricing is universally described as the cloud's most aggressive lock-in mechanism. Storing 100 TB on AWS costs $2,300/month, but downloading that same 100 TB over the public internet costs an astonishing $9,000 in bandwidth surcharges ($0.09 per GB).
      


      
1. Why Is Cloudflare R2's Egress Free ($0.00)?

      

        Traditional hyperscalers (AWS, Azure, Google Cloud) treat egress bandwidth as a high-margin profit center with markups exceeding 8,000% over underlying transit carrier rates. Cloudflare, conversely, is an infrastructure transit giant with over 300 Tbps of edge capacity and direct peering connections to over 12,000 networks worldwide.
      

      

        By eliminating egress fees, Cloudflare uses R2 as an architectural anchor to drive developers toward their serverless compute ecosystem (Cloudflare Workers, Pages, and Queues), where compute calls against R2 execute with zero network hops and zero transit taxation.
      


      
2. The Class A and Class B Operations Nuance

      

        While R2's storage and egress are significantly cheaper, engineers must carefully evaluate API operation velocity:
      

      

      
3. Zero-Downtime Migration Pattern: The Dual-Write Proxy

      

        Migrating petabytes of active data without downtime or user-facing errors requires a graceful cutover strategy:
      

      
    

  


  
  

    
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Frequently Asked Questions

    
    

      
How is Cloudflare R2 able to offer 100% free internet egress? +

      
Cloudflare owns and operates its own global Anycast fiber network across 300+ cities and is a founding member of the Bandwidth Alliance. Because Cloudflare peers directly with thousands of global ISPs, outbound bandwidth costs them fractions of a cent per gigabyte, allowing them to offer $0.00 egress as a loss leader to attract enterprise workloads into the Cloudflare Workers ecosystem.

    


    

      
Is Cloudflare R2 100% compatible with the AWS S3 API? +

      
Yes. Cloudflare R2 implements the standard S3 API specification. You can use existing AWS SDKs (JavaScript, Python Boto3, Go, Java), CLI tools (aws-cli, s3cmd), and backup utilities (rclone) simply by passing your Cloudflare Account ID endpoint (https://.r2.cloudflarestorage.com) and R2 access keys.

    


    

      
When does AWS S3 turn out cheaper than Cloudflare R2? +

      
AWS S3 can be cheaper in scenarios with massive Class A request velocity (millions of small PUT/POST operations) combined with zero outbound egress—such as internal log archiving consumed exclusively by EC2 instances in the same AWS region via a free S3 Gateway Endpoint. S3 also offers Glacier Deep Archive ($0.00099/GB) for cold compliance data that is almost never read.

    


    

      
How does Cloudflare R2 pricing compare to Backblaze B2 and Wasabi? +

      
Cloudflare R2 is $0.015/GB with zero egress. Backblaze B2 is $0.006/GB with 3x free egress (and $0.01/GB after). Wasabi is $0.0069/GB with egress included up to monthly storage volume. For read-heavy workloads where egress exceeds 3x to 5x storage, R2 is the cheapest and most predictable option with no retention penalty minimums.

    


    

      
Does Cloudflare R2 have a minimum object storage duration? +

      
No! Cloudflare R2 has no minimum storage duration. AWS S3 Standard-Infrequent Access charges a 30-day minimum, and Wasabi requires a 90-day minimum storage retention fee if objects are deleted early. R2 bills purely by the second.

    


    

      
What is the best zero-downtime migration strategy from S3 to R2? +

      
The industry standard pattern is Cloudflare Super Slurper or Dual-Write proxying. Your application first attempts to read from R2; if an object is missing (HTTP 404), it falls back to reading from S3, serves the user, and asynchronously copies the object to R2. Meanwhile, a background tool like rclone migrates cold historical objects in batches.

    


    

      
Can you attach a custom domain with free SSL to a Cloudflare R2 bucket? +

      
Yes. You can map any custom domain or subdomain (e.g., assets.yourcompany.com) directly to an R2 bucket in the Cloudflare dashboard with automatic SSL/TLS certificate provisioning and global Cloudflare Edge caching at zero extra cost.

    


    

      
Are there any AWS S3 features that Cloudflare R2 does not support? +

      
Cloudflare R2 does not support S3 Object Lock (WORM compliance), S3 Batch Operations, S3 Select, or complex XML bucket website hosting configurations. However, R2 natively supports pre-signed URLs, multipart uploads, CORS, lifecycle expiration rules, and Cloudflare Workers event notifications.