Fake S3

Fake S3 Project · checked 14 Nov 2026

#9 · Cloud Service Emulators

Visit github.com ↗ Alternatives Fake S3 vs Azure Cosmos DB Emulator

How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on Cloud Service Emulators6.0#9 of 15

Fake S3 is a lightweight server that mimics Amazon S3 API calls and responses for sandbox testing.

Pricing

Evaluation30-day evaluation license · Evaluation use only · No credit card requiredFree
HobbyistFree annual subscription · Non-commercial projects onlyFree
CommercialAnnual subscription; organization size 5,000+ · Production use$2,500/yr
CommercialCustom pricing for larger organizations · Production useOn request

As supso.org lists them, checked 14 Nov 2026.

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: github.com
Price: Free tier · from $2,500/yr
Free trial: Yes
Additional clients: The supported-clients page provides examples for Ruby, Android, Java, command-line tools, Node.js, Elixir, Python, and Go clients.
Client compatibility: The README says Fake S3 is mainly tested with s3cmd, the aws-s3 gem, and right_aws.
Commercial rights: The commercial license grants production use in commercial products, internal tools, and customer-facing services.
Deployment: The README provides a Ruby gem installation command and a command-line server launch example.
Evaluation: A free 30-day evaluation license is available without a credit card.
License requirement: The licensing page says a license is required for nearly all organizational use, while non-commercial hobbyist projects can obtain a free license.
Maintenance status: GitHub marks the repository as archived and read-only since February 12, 2024.
Minimal dependencies: The repository describes the server as lightweight and designed to minimize runtime dependencies.
Offline testing: The vendor says it can be used without internet access or real AWS calls and costs.
Scope: The project README describes Fake S3 as a development testing tool rather than a production S3 replacement.
Supported operations: The README lists put, get, list, copy, and make-bucket operations among the supported commands.
Typical environment: The vendor recommends pointing an application at Fake S3 during development and CI.

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