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Zitadel: The Open‑Source SSO Solution

If you’re like me, you might have caught the self-hosting bug, diving head-first into hosting everything from media servers and password managers to monitoring tools and VPN solutions. While it’s fantastic to have total control over your data and applications, it quickly turns into an endless cycle of entering passwords, emails, or even managing different credentials for every single app. Let’s face it: it becomes tiresome pretty fast.

That’s exactly why Single Sign-On (SSO) becomes a lifesaver. The concept is simple: authenticate once and access multiple apps seamlessly. While SSO is commonplace in enterprises, personal projects or small self-hosted setups often hide this useful feature behind expensive paywalls. But worry not—there are cost-effective solutions that let you get started with SSO without burning a hole in your pocket.

Take Cloudflare, for instance. Even their free tier lets you enable SSO integration for your apps exposed via their tunneling service. I’ve previously written about how you can expose your local services online with Cloudflare for free, a handy guide to securely making your self-hosted apps accessible from anywhere.

Similarly, if you’re a fan of modern, secure VPNs like NetBird—which I highly recommend—you’ll be pleased to learn that NetBird also supports SSO integration. If you haven’t checked out NetBird yet, here’s my article covering NetBird, a self-host-friendly VPN solution designed for modern secure networking.

Now, while leveraging services like Cloudflare or NetBird is a great way to dip your toes into the SSO world, sometimes you might want even more control over your authentication system. Enter Zitadel.

Zitadel is a modern, fully open-source identity management solution built with developers and self-hosters in mind. What sets Zitadel apart is its flexibility—you can opt for their hosted service with a generous free tier or self-host the entire solution yourself if you want absolute control.

Let’s talk about the hosted solution first. Zitadel’s free tier isn’t skimpy: you get support for multiple identity providers (think Google, GitHub, Apple, and more), unlimited users, apps, and projects, plus the ability to integrate easily with your existing self-hosted services. For many users, especially those just starting with SSO, this tier is more than enough.

If, however, you’re firmly in the self-hosting camp (welcome, my friend!), Zitadel lets you run everything on your own infrastructure. Docker-compose, Kubernetes—take your pick. Deploying Zitadel is straightforward and well-documented, making it accessible even if you’re relatively new to the self-hosting scene.

Once set up, Zitadel offers a smooth user experience. You log in once, and from there, you have seamless access to all your apps. No more juggling dozens of passwords or struggling with forgotten credentials. And importantly, you’ll drastically reduce password fatigue, improving both convenience and security.

Another significant advantage is the centralized user management Zitadel provides. Need to onboard friends or family members to your self-hosted apps? Zitadel simplifies that as well, giving you a centralized place to manage permissions, groups, and user access controls.

Integration-wise, Zitadel plays nicely with popular protocols like OAuth 2.0 and OpenID Connect, ensuring compatibility with virtually any app or service you might want to self-host. Whether it’s a personal Nextcloud instance, Jellyfin media server, or even administrative tools like Portainer, Zitadel handles the authentication effortlessly.

At the end of the day, SSO transforms your self-hosting journey from tedious credential management into a smooth and secure experience. Cloudflare and NetBird are great places to start integrating SSO, especially if you’re already using these services. But for ultimate flexibility, Zitadel offers a robust, user-friendly, and truly open-source solution—whether hosted or self-hosted—that lets you manage authentication on your terms.

Ready to simplify your digital life? Give Zitadel a spin, and say goodbye to password headaches!

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