Open Source Storage
Cloud object storage feels free until the bill arrives itemized by gigabyte stored, request made, and gigabyte pulled back out - and egress fees mean the data you already own is held just slightly hostage every time you want it back. The open source, S3-compatible storage here runs that same API on your own disks, so capacity is a hardware decision you make once rather than a meter that charges you for keeping and reading your own files.
SeaweedFS
Distributed storage for object storage, file systems, and Iceberg tables with horizontal scaling
Dragonfly
In-memory data store compatible with Redis and Memcached APIs, built for modern application workloads
RustFS
Distributed object storage in Rust with S3 compatibility and OpenStack Swift support
Verdaccio
Zero-config local private npm registry with proxy caching for npmjs.org and other registries
Ceph
Scalable distributed storage system for object, block, and file data
Cryptomator
Client-side cloud encryption that keeps files private before they reach Dropbox, Google Drive, OneDrive, and more
Duplicati
Free, open-source backup client for encrypted, incremental cloud backups
JuiceFS
Distributed POSIX file system for cloud storage and metadata separation
Rook
Cloud-native storage orchestrator for Kubernetes with Ceph automation and lifecycle management