s3

MinIO is a high-performance, S3-compatible object storage solution designed for AI/ML workloads. It offers industry-leading performance, scalability, and enterprise features while remaining open source under the AGPL license.

SeaweedFS is a fast distributed storage system for blobs, objects, files, and data lake, optimized for billions of files. It provides O(1) disk seek performance, cloud tiering, and features like POSIX FUSE mount, S3 API, Kubernetes support, and erasure coding.

SFTPGo is a full-featured and highly configurable file transfer solution supporting SFTP, HTTP/S, FTP/S, and WebDAV protocols with multiple storage backends including local filesystem, S3, Google Cloud Storage, and Azure Blob Storage.

Zenko CloudServer is an open-source Amazon S3-compatible object storage server that provides a unified S3 API interface to access multiple backend storage systems, both on-premise and in public clouds.

Garage is an S3-compatible distributed object storage service designed for self-hosting at small-to-medium scale. It focuses on geo-distributed deployments with data replication across multiple physical locations.