Compare object storage costs (S3, Blob, Cloud Storage) with interactive calculator.
Last verified: April 2026
Output will appear here...Your analytics team stores 50 TB of Parquet files that data scientists query weekly, pulling about 2 TB of data per month. On S3 Standard, storage costs $1,150/month but egress is zero because queries run on EC2 in the same region. Your CFO asks about moving to GCP for a cheaper analytics stack. The comparison shows GCS Standard storage is slightly cheaper at $1,000/month, but the 2 TB of cross-cloud egress during migration testing would add $240/month. You recommend keeping the data on S3 and using BigQuery Omni for cross-cloud queries instead.
The Multi-Cloud Object Storage Cost Compare tool lets you estimate and compare object storage costs across AWS S3, Azure Blob Storage, and GCP Cloud Storage in a single view. Enter your storage volume, request rates, and data retrieval patterns once and see side-by-side cost breakdowns for equivalent storage tiers on each provider. The comparison covers hot, warm, cold, and archive tiers with their respective operation and retrieval fees, making it easy to identify which provider offers the best price for your specific access pattern. This tool is invaluable for multi-cloud strategy decisions and vendor negotiations.
The estimator takes storage volume, request counts, and data retrieval patterns as inputs, then applies each provider's pricing for the equivalent storage tier. It calculates storage cost, request cost (PUT/GET/LIST), data retrieval fees (for cold/archive tiers), and egress charges separately, presenting a detailed breakdown that reveals which cost component dominates for your specific workload pattern.
Egress pricing is where cloud storage comparisons fall apart. All three providers offer competitive storage rates, but downloading data is where costs explode. AWS charges $0.09/GB for internet egress, Azure $0.087/GB, and GCP $0.12/GB for the first 1 TB. A 10 TB monthly data distribution workflow adds $870-1,200/month in egress alone.
Archive retrieval costs are the trap that catches people doing cost comparisons on storage alone. S3 Glacier Deep Archive stores data at $0.00099/GB/month but retrieval costs $0.02/GB plus a per-request fee, and standard retrieval takes 12 hours. Azure Archive is similar. Always model your retrieval pattern, not just storage costs.
GCS offers dual-region and multi-region storage classes that automatically replicate data across regions at a higher storage rate but with no cross-region egress charges for reads. If your workload reads data from multiple regions, GCS multi-region can be cheaper than replicating S3 buckets across regions manually.
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Disclaimer: This tool runs entirely in your browser. No data is sent to our servers. Always verify outputs before using them in production. AWS, Azure, and GCP are trademarks of their respective owners.