Google Cloud Storage vs Amazon S3
A detailed comparison to help you choose between Google Cloud Storage and Amazon S3.
Quick Verdict
4.0/5
Google Cloud Storage
0 reviews
4.1/5
Amazon S3
0 reviews
Amazon S3 is rated higher (4.1 vs 4.0). Cloud object storage service for storing and retrieving unstructured data at scale. For developers, data engineers, and enterprises managing backups, archives, and analytics workloads. AWS S3 stores and retrieves unlimited amounts of data via a simple web interface. Built for developers, enterprises, and anyone needing reliable, durable cloud storage with pay-as-you-go pricing.
Google Cloud Storage Scalable object storage for any data type, integrated with Google Cloud |  Amazon S3 Scalable object storage for any data size or type | |
|---|---|---|
| Overview | ||
| Rating | 4.0 (0 reviews) | 4.1 (0 reviews)✓ |
| Pricing model | pay-as-you-go | pay-as-you-go (per GB-month + per 1,000 requests + retrieval/transfer) |
| Starting price | Free tier available✓ | From $0.023/mo |
| Best for | Teams already building on Google Cloud — BigQuery, Dataflow, Vertex AI — and cold backup/archive workloads that value the cheap Nearline, Coldline, and Archive classes. | Teams building on AWS who need durable, API-stable object storage for backups, data lakes, static content and archives — and who value tooling compatibility over the lowest per-GB rate |
| Features | ||
| IPv6 | ✓ | |
| DDoS protection | ✓ | |
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ✓ | |
| Free tier | ||
| Data-center locations | ||
| Regions | — | 39 AWS regions / 123-124 AZs |
| Tags | ||
| Tags | free tiers3 compatibleapi accesseu datacenterus datacenterapac datacenterterraform provider | free tiers3 compatibleapi accessus datacentereu datacenterapac datacenterterraform provider |
| Visit Google Cloud Storage → | Visit Amazon S3 → | |
Google Cloud Storage
Pros
- + Per-GiB-hour pricing published per class and location, prorated per second — no commitment required
- + Four storage classes put cold bytes as low as about $0.0012/GB-month (Archive)
- + Credit-backed SLA: 99.95% multi/dual-region Standard with 10–50% credits on miss
- + Real S3 interoperability (XML API, HMAC keys, V4 signing) plus a documented migration path
- + Always Free tier (5 GB-months, 50k Class B ops, 100 GB egress in US regions) can host a small real workload
Cons
- - Egress at $0.12/GiB (Premium) makes read-heavy serving expensive without a CDN in front
- - Cold classes carry minimum storage durations and retrieval fees — wrong class choices cost more than Standard
- - Many pricing dimensions (classes, placement, network tiers, operation classes) make forecasting hard
- - IAM and lifecycle configuration is a real learning curve and a common source of misconfiguration
Amazon S3
Pros
- + Designed for 11 nines durability with cross-AZ replication by default and strong read-after-write consistency
- + The S3 API is the industry standard — code written in 2006 still works, and third-party compatibility is everywhere
- + 23x cost ladder from Standard down to Glacier Deep Archive at $0.00099/GB-month, with lifecycle automation
- + Deepest storage feature set available: versioning, Object Lock, replication, inventory, event notifications, access management
Cons
- - Egress at $0.09/GB and per-request pricing produce surprise bills for chatty or restore-heavy workloads
- - IA and Glacier classes add retrieval fees and latency — the restore path must be priced separately
- - Policy configuration (bucket policies, IAM, Block Public Access, KMS keys) is complex and historically error-prone
- - SLA (99.9%/99.0%) is far below the durability figure — availability and durability are different promises
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