I built an Open-source Dropbox/Google Drive BOYB(Bring your own bucket)
BOYB architecture wraps S3 or R2 with a Dropbox UI without migrating data.

BYOB S3 storage beats Nextcloud's heavy infrastructure requirements for simple file hosting.
Developers, self-hosters, small teams
Nextcloud · OwnCloud · Filestash
Here is Locker: the ultimate open-source Google Drive/box/Dropbox alternative - Provider agnostic (S3, R2, vercel blob, local) - BYOB (Bring your own bucket) - Virtual file system - QMD Search plugin
BOYB architecture wraps S3 or R2 with a Dropbox UI without migrating data.
Cryptomator and Boxcryptor already do encrypted multi-cloud storage better.
Hit Ctrl+Space and fuzzy-search local drives and cloud sources with indexes that stay on your machine — instant results without uploading file contents. The stack (Tauri + React/TypeScript front-end and a Rust indexing backend) signals genuine attention to native performance and privacy, and integrations with Google Drive, Notion, Slack and SharePoint are the practical draw. It's useful and thoughtfully focused, but the space is crowded so long-term value depends on reliability of indexing, more deep connectors, and how compelling the $129 lifetime license feels to users.
Frame.io UX for Google Drive videos without the subscription fee or upload sync.
Six mini-apps in one, but each solves a problem existing tools already handle.
GUI for TCG self-encrypting drives with pre-boot auth, finally usable.