Open Source S3 Object Storage

There are several open-source S3-compatible object storage solutions available that you can use as an alternative to commercial cloud-based S3 services. These solutions provide similar object storage capabilities but allow you to host the storage on your own infrastructure. Here are some popular open-source S3-compatible object storage options:

S3 Object Storage

What are the most popular Open Source Object Storages?


MinIO is a high-performance, cloud-native, and Kubernetes-native object storage server. It is S3-compatible and designed for scalability, allowing you to build private cloud storage solutions. MinIO is written in Go and is known for its simplicity and ease of deployment.


Ceph is a unified distributed storage system that supports object, block, and file storage. It includes an S3-compatible object storage component called RADOS Gateway, which enables you to access data through the S3 API. Ceph is highly scalable and suitable for large-scale deployments.

OpenStack Swift:

OpenStack Swift is an object storage system that is part of the larger OpenStack cloud computing platform. It provides an S3-compatible API along with its native Swift API. Swift is designed for data durability and is often used in private cloud environments.

Scality Zenko:

Zenko is an open-source multi-cloud data controller that provides an S3-compliant interface to multiple backend storage systems, including cloud-based object storage services and on-premises storage. Zenko enables data portability and management across multiple cloud environments.


OpenIO is an object storage solution designed for large-scale and distributed deployments. It provides S3 compatibility and is known for its high data resilience and flexibility.


B2 is the open-source version of Backblaze's B2 Cloud Storage, providing S3-compatible APIs for object storage. You can deploy B2 on your own infrastructure using their open-source implementation.

These open-source S3-compatible object storage solutions offer flexibility and control over your data, making them suitable for various use cases, including private cloud storage, on-premises data storage, and hybrid cloud setups. Before choosing any specific solution, consider factors such as scalability, performance, ease of deployment, and integration with your existing infrastructure. Make sure to review their documentation, community support, and development activity to determine which one aligns best with your requirements.