Self-Hosted Cloud Storage: What It Is and How It Works

Self-hosted cloud storage is a file service that runs on your own server, not a provider’s. As a result, you keep the files and choose where the server sits. You pay for the machine, not for each person. This guide explains how it works, which tools you can run, and what you take on.

You will also see it searched without the hyphen: self hosted cloud storage. Both mean the same thing. The article draws on Wikipedia, the European Commission’s open source catalogue and Nextcloud’s own manual. It also points to the next steps on cost and servers.

What Is Self-Hosted Cloud Storage?

Self-hosted cloud storage is software that gives you the features of a cloud drive, such as sync, sharing and a web interface. It runs on hardware you rent or own. The provider is you. As a result, you decide the location, the users and the rules, which is the core idea behind self-hosting.

However, it differs from a hosted service in one more way: your files stay in ordinary folders. According to Wikipedia, Nextcloud keeps files in a conventional directory structure that you can reach through WebDAV. The ownCloud page says it works the same way. So leaving later does not mean exporting a locked archive.

How Does Self-Hosted Cloud Storage Work?

A server holds the files and a small application serves them to clients, so every device sees the same folders. Your laptop, phone and browser all talk to that one server. The server, in turn, talks to its disks.

Flow diagram of self-hosted cloud storage: your devices, such as a laptop, phone and browser, send files over HTTPS to your own server running a web server, an application and a database, which stores the files on your own disks.

Meanwhile, the client apps do the file sync. They watch a local folder, send what changed over HTTPS, and pull what other devices changed. Wikipedia lists Nextcloud clients for Windows, macOS, Linux and FreeBSD, plus phone apps. Also, the server needs a database for permissions, shares and comments.

Which Self-Hosted Cloud Storage Options Can You Run?

Four tools cover most needs: Nextcloud, ownCloud, Seafile and Syncthing. They differ in how much they do and whether they need a central server. So pick by the job, not by the name.

Table of four self-hosted cloud storage options: Nextcloud is a workspace platform under AGPL-3.0 with a central server, ownCloud offers file sharing and sync under an AGPL-3.0 licence for its PHP server with a proprietary Enterprise edition, Seafile is a file-first sync tool with an open source Community and a proprietary Professional edition, and Syncthing syncs devices directly under MPL-2.0 without a central server.

Overall, Nextcloud does the most. Wikipedia describes it as a modular workspace platform, with office suites such as Collabora Online, chat and video calls. Its licence is AGPL-3.0, which the European Commission’s open source catalogue also lists. By contrast, ownCloud sticks closer to files. Its page says it comes in two versions, ownCloud 10 on PHP and Infinite Scale on Go, and that CERN and the Bavarian school cloud used it as of late 2023.

Syncthing is the odd one out. It is a peer-to-peer tool that syncs your own devices directly. As a result, it needs no server of your own, and it gives outsiders no web interface. Finally, Seafile sits between the two, with a server that focuses on fast file sync.

How Did Nextcloud and ownCloud Split?

They split in 2016, when ownCloud’s founder and most of its core developers left to start Nextcloud. Wikipedia’s account is short, but it shows how fast these projects can change owners.

Timeline table in five dates: Frank Karlitschek launches ownCloud in 2010, he and most core contributors leave and fork it as Nextcloud in April 2016, ownCloud Inc. closes on 2 June 2016 and ownCloud GmbH takes over, Nextcloud wins the tender for Germany’s federal cloud in 2018, and ownCloud merges with Kiteworks at the end of 2023.

Why Do People Choose to Self-Host Their Files?

People choose it for three reasons: control over where files live, a flat cost as the team grows, and the freedom to leave. The first reason now reaches governments, because Wikipedia reports that the governments of France, Sweden and the Netherlands chose Nextcloud for file transfer in 2019.

It also reports that a 2021 European Commission study called Nextcloud the most widely deployed open source content collaboration platform. The European Data Protection Supervisor and the German state of Schleswig-Holstein have also moved from SharePoint to Nextcloud, according to Wikipedia. So the idea is no longer a hobby: public bodies use it to keep control of their own data.

For a company, the same logic applies at a smaller scale. A server in a data centre you can name makes GDPR questions easier to answer. You know where the files are, and you know who can reach the machine.

What Do You Take On When You Self-Host?

You take on updates, backups, security and any extra service, such as a document editor. No provider does them for you. That is the honest price of control, and it is worth counting before you start.

• Updates: the server software and its runtime need regular patches. The PHP2Shell flaws of October 2026 put unpatched PHP installations at risk, and Nextcloud runs on PHP.
• Backups: file sync is not a backup. Sync copies a deletion to every device as faithfully as it copies a file.
• Security: you set up TLS and control who has access.
• Extra services: browser editing needs a separate service. Nextcloud Office is built on Collabora Online, and ONLYOFFICE suspended its Nextcloud partnership in March 2026.
• Free-tier limits: Nextcloud’s fair-use policy asks for an Enterprise subscription above 500 users, and ownCloud aims its Enterprise tier at the same size, according to Wikipedia.

What Server Does a Self-Hosted Cloud Need?

A small Linux server is enough to start: a 64-bit system, a web server, PHP, a database and enough disk space. The disks and the backups decide when to grow. Nextcloud’s manual sets memory per PHP process and gives a single-server band of up to 100 users, and our sizing guide turns those figures into plans.

In practice, disk space and bandwidth matter more than cores. A full 1 Gbps port moves 450 GB an hour, and a hard disk is the cheapest class per terabyte. A rented dedicated server gives you both without a neighbour sharing the port.

How Do You Start With Self-Hosted Cloud Storage?

Start by naming the job, then pick one tool, rent a small server and test a restore before you invite anyone. Small steps keep the risk low, because you can always grow the machine later.

• Name the job: sharing files with a team, syncing your own devices, or replacing a whole office suite.
• Pick one tool: Nextcloud for a workspace, Seafile or ownCloud for files, Syncthing for your own devices. The same idea works for video. Our PeerTube guide shows how a self-hosted video platform sizes its server.
• Rent a small server: a Linux machine with a fixed port and root access is enough to begin.
• Test the backup: restore a copy before anyone depends on the system.

Table of three ways to run cloud storage: a hosted service is updated by the provider, placed by the provider and paid per user, managed hosting of the same software is updated by the host, placed by you from the host’s regions and paid per plan, and a self-hosted server is updated and placed by you and paid as a flat server price.

Is Self-Hosted Cloud Storage Right for You?

It is right if you want control, large storage or a fixed bill, but wrong if you want zero administration. Match your situation to the table.

Table of whether self-hosting is a good fit: a strong fit when files must stay in a place you choose and when there are many users or many terabytes, and a weak fit for just a few people or when no one can run a server.

Self-Hosted Cloud Storage: The Short Version

Self-hosted cloud storage is a cloud drive on a server you control. Files stay in ordinary folders, and the bill stays flat as the team grows. The price is the work, because updates, backups and security are yours.

• Pick the tool by the job: a workspace, file sync, or device-to-device sync.
• Count the work before you count the savings.
• Start small, and size the disks and the backups first.

Frequently Asked Questions

What is self-hosted cloud storage?

How does self-hosted cloud storage work?

Is self-hosted cloud storage safe?

What is the best self-hosted cloud storage?

Is self-hosted cloud storage free?

Is self-hosted cloud storage a backup?

Can I self-host cloud storage at home?

What is the difference between Nextcloud and ownCloud?