Object storage · Comparison
Amazon S3 vs Google Cloud Storage
2 products compared side by side: what you pay for with each one first, then the five access facts, entry prices, recorded plan limits and the bottom line of each review. The evidence note under the table says how each product was checked.
Side by side
| Metric | Amazon S3 | Google Cloud Storage |
|---|---|---|
| What you're paying for | Compliance includedThe S3 API itself, with compliance-mode Object Lock, replication and a self-serve HIPAA BAA in place, billed per use with no minimum charge. | Compliance includedHot to archive storage in one API, with cross-region buckets, retention locks that cannot be undone and compliance papers you accept yourself. |
| Overall score | 6.4 | 7.3Best |
| Free option | Free trial | Free plan |
| Card to start | –Not measured | Card required |
| Getting access | Self-serve | Self-serve |
| Starter priceCheapest paid plan | $0.023/GB-mo | $0.02/GiB-month |
| Pricing model | Usage-based | Usage-based |
| Pricing page | Public prices | Public prices |
| Standard storage price | $0.023/GB-month (US East, first 50 TB; binary GB) | $0.02/GiB-month (Iowa, us-central1; prorated to the sub-second) |
| Egress to the internet | $0.09/GB for the first 10 TB (US East); 100 GB a month free across AWS | $0.12/GiB for the first 10 TiB (all destinations except China and Australia); free within the same Google Cloud location |
| Request fees | PUT, COPY, POST, LIST $0.005 per 1,000; GET $0.0004 per 1,000 | Class A $0.005 per 1,000; Class B $0.0004 per 1,000 (Standard, single region) |
| Free option | No permanent free storage; up to $200 in credits for new accounts | 5 GB-months, 5,000 Class A, 50,000 Class B and 100 GB egress a month, permanent (3 US regions); $300 credit for 90 days |
| Reference scenario (1 TB/mo) | $122.00 in US East, $90 of it egress, computed | $149.00 in Iowa, $120 of it egress, computed |
| Billing minimums | None on S3 Standard; 30 to 180 days on colder classes | None on Standard; 30 to 365 days on colder classes |
| S3 API | Native (the S3 API itself) | Interoperability mode (XML API with HMAC keys) |
| Versioning and object lock | Versioning; compliance-mode Object Lock | Versioning; Bucket Lock and Object Retention Lock (Locked mode cannot be removed) |
| Replication | Cross-Region and Same-Region Replication | Built into dual- and multi-region buckets; cross-bucket replication |
| SOC 2 / ISO 27001 | AWS SOC 2 report in AWS Artifact; ISO 27001 list names S3 | Google Cloud SOC 2 Type II (quarterly, names Cloud Storage); ISO 27001 |
| HIPAA BAA | Self-serve in AWS Artifact | Self-serve in the console (IAM & Admin) |
| Regions | 36, including EU and AWS GovCloud (US) | 43, including 13 in Europe, plus dual-regions and ASIA, EU and US multi-regions |
| Bottom line | From its public pages, Amazon S3 is the reference S3 service and has every protection and compliance feature we score. Storage and requests are priced per use with no minimum, and internet egress, billed per GB, is the main cost to plan for. | From its public pages, Google Cloud Storage has nearly every protection and compliance feature we score, publishes every price in USD and keeps a permanent free tier. Internet egress, billed per GiB, is the main cost, and S3 support is an interoperability mode. |
Evidence: Amazon S3: facts checked 2026-10-15 from its public sign-up and pricing pages, no completed hands-on run; Google Cloud Storage: facts checked 2026-10-15 from its public sign-up and pricing pages, no completed hands-on run. Prices in USD as listed, excluding tax. "–" means not recorded.
When to pick each
In the words of each review, with the date its facts were checked.
From our Amazon S3 review
Checked Oct 15, 2026- Pick Amazon S3 when
- Your tools expect the S3 API as the main interface, not an interoperability mode.
- Pick Google Cloud Storage when
- You build on Google Cloud and want a permanent free tier of 5 GB-months, or dual- and multi-region buckets.
From our Google Cloud Storage review
Checked Oct 15, 2026- Pick Google Cloud Storage when
- You build on Google Cloud, or want a permanent free tier of 5 GB-months with requests and egress, or dual- and multi-region buckets.
- Pick Amazon S3 when
- Your tools expect the S3 API as the main interface; our 1 TB scenario is also lower there, $122 against $149.
Entry price
Baseline: each product's cheapest paid plan, per month. Included usage differs, so read the line under each price.
- Amazon S3S3 Standard$0.023/GB-moUS East, first 50 TB; $0.022 next 450 TB, $0.021 over 500 TB; GB = 2^30 bytes
- PUT, COPY, POST, LIST $0.005 per 1,000 requests
- GET $0.0004 per 1,000 requests
- Internet egress $0.09/GB for the first 10 TB
- No minimum storage duration or object size
- Google Cloud StorageStandard storage$0.02/GiB-monthIowa (us-central1); $0.023 in Northern Virginia, $0.026 in the US multi-region, $0.022 per region in dual-regions
- Class A $0.005 and Class B $0.0004 per 1,000 operations (single region)
- Internet egress $0.12/GiB for the first 10 TiB
- No minimum storage duration and no retrieval fee
- GB means JEDEC GB (GiB)
Prices as listed on each pricing page, in USD per month, excluding tax. Observed: Amazon S3 2026-10-15, Google Cloud Storage 2026-10-15.
Which one fits
- If you need to start today without a sales call
- Google Cloud StorageSelf-serve sign-up, card required; the highest score of the 2 self-serve products here (7.3/10).
- Lowest starter price
- Google Cloud Storage$0.02/GiB-month for the Standard storage (Iowa, us-central1) plan.
- Highest overall score
- Google Cloud Storage7.3/10 (Good). The review shows the score breakdown and the run behind it.
Picked by fixed rules from the table above, not by hand. How we score
Full reviews
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