Open-source DigitalOcean Spaces alternatives

SeaweedFS is a distributed storage system built to store very large numbers of files and serve them quickly. A single weed binary can provide an S3-compatible object store, a POSIX file system and S3 Tables for lakehouse use, all over the same data. The project is written in Go and released under the Apache-2.0 license.

Its design aims for constant-time disk access per file, and capacity grows by starting another volume server. Cloud storage can be cached or tiered transparently, and replication and erasure coding are supported. The same process can also run the master, volume servers, a filer, WebDAV, an Iceberg REST catalog and an Admin UI. You can start with one command, Docker, Docker Compose or Helm on Kubernetes, or build from source. The README includes comparisons with HDFS, Ceph, GlusterFS, MooseFS and MinIO.

RustFS is a distributed object storage system built in Rust. It offers S3 API compatibility for supported features, and is meant to coexist with, or take over from, platforms like MinIO and Ceph that also speak the S3 API. The project is open source under the Apache 2.0 license and highlights that this avoids the restrictions of AGPL-licensed alternatives.

The feature list includes a scalable, fault-tolerant distributed architecture, an S3 compatibility matrix that tracks current coverage, and native support for the OpenStack Swift API and Keystone authentication. It is tuned for data lakes, AI and big data workloads, and the README says it was designed for easy deployment and management. A status legend marks features as available, preview or planned, so check the documentation for the current state of each capability before relying on it.

Ceph is a distributed storage platform that offers object, block and file storage from one software-defined system. It is designed to scale across many servers and provide highly available storage, and it is written mainly in C++.

Repository topics show the range of protocols and features it covers: S3-compatible object storage, block storage, a POSIX distributed file system with FUSE access, protocols such as NFS, SMB, iSCSI and NVMe over Fabrics, and replication and erasure coding for data protection. The topics also mention Kubernetes and HDFS.

Most of Ceph is dual-licensed under the LGPL version 2.1 or 3.0, with some code in the public domain or under BSD-style licenses, which is why the repository lists the license as 'Other'. The documentation uses CC-BY-SA-3.0, and contributions need a Signed-off-by line without copyright assignment. Ceph is deployed on your own hardware or cloud infrastructure.