The best open source alternative to Filestash is Spacedrive. If that doesn't suit you, we've compiled a ranked list of other open source Filestash alternatives to help you find a suitable replacement. Other interesting open source alternatives to Filestash are: Nextcloud and Firefiles.
Filestash alternatives are mainly Cloud File Sync & Share Tools but may also be File Management Utilities or Distributed Storage Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Filestash.
A cross-platform file manager that unifies your devices into a seamless, organized digital workspace.

Important: Development paused due to funding constraints (source).
Spacedrive revolutionizes file management by creating a virtual distributed filesystem across all your devices. This open-source application offers a unified interface to access, organize, and manage your files, regardless of their physical location.
Key benefits of Spacedrive include:
Spacedrive empowers you to take control of your digital assets, providing a seamless experience across all your devices and storage solutions. Whether you're a creative professional managing large media libraries, a developer organizing code repositories, or simply someone looking to declutter their digital life, Spacedrive offers the tools you need to create a more efficient and organized digital workspace.
Nextcloud offers on-premises file sync, sharing and collaboration platform with advanced security and privacy features.

Nextcloud is an open source, self-hosted file sync and share platform that allows organizations to store, share and collaborate on files securely.
Key features include:
Nextcloud is designed for organizations that need secure file sharing and collaboration while maintaining control over their data. It can be deployed on-premises or with a trusted cloud provider.
Some key benefits of Nextcloud:
Nextcloud is used by thousands of organizations worldwide, including major enterprises, educational institutions and government agencies. It provides a powerful yet easy-to-use platform for secure content collaboration.
Firefiles turns S3 buckets and other cloud backends into a unified file manager with browser-based previews, multi-drive support, and a clean light/dark interface.

Firefiles is a self-hosted file manager that sits on top of your existing cloud storage. Instead of paying for a service like Dropbox to hold your files, you connect your own storage buckets and manage everything through a modern browser interface. Your data stays wherever you put it.
The core idea is simple: you bring the storage, Firefiles brings the interface. It currently supports AWS S3 buckets as backends, letting you treat them as cloud drives you can browse, upload to, and download from without touching the AWS console.
Key capabilities include:
Firefiles fits individuals or small teams who already use S3-compatible cloud storage and want a cleaner way to interact with it. If you've been relying on the AWS console or a tool like Filestash and want something more polished and purpose-built, Firefiles is worth a look.
Because you own the backend, there's no storage cap imposed by the app itself. Your limits are whatever your chosen cloud provider allows. Privacy is a genuine advantage here: no third-party service holds your files or has access to your data.
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