Identity and SSO
What it costs to self-host Zitadel
ZITADEL - Identity infrastructure, simplified for you. Below is the server it needs at each team size, what that costs, and how long the 2 commercial products it replaces would take to cost more.
| Team size | Memory | Disk | Cheapest plan that fits | Server | With backups and your time |
|---|---|---|---|---|---|
| solo | 2.5 GB | 10 GB | Starter 4 GB · VPSServer | $22.00 | $139 |
| 5 people | 2.5 GB | 10.1 GB | Starter 4 GB · VPSServer | $22.00 | $139 |
| 10 people | 2.5 GB | 10.1 GB | Starter 4 GB · VPSServer | $22.00 | $139 |
| 25 people | 2.6 GB | 10.2 GB | Starter 4 GB · VPSServer | $22.00 | $139 |
| 50 people | 2.6 GB | 10.5 GB | Starter 4 GB · VPSServer | $22.00 | $139 |
| 100 people | 2.7 GB | 11 GB | Starter 4 GB · VPSServer | $22.00 | $139 |
| 250 people | 3.1 GB | 12.5 GB | Starter 4 GB · VPSServer | $22.00 | $139 |
The sizing model for Zitadel
Go binary over PostgreSQL, with an event-sourced audit log. Lighter than the JVM option and closer to Auth0's developer ergonomics.
- 2 GB of memory for the whole stack at rest, every container the project ships included.
- 2 MB more per active user, then 25% on top so the box is not running at its ceiling.
- 10 GB of disk to begin with, growing 0.01 GB per user.
- 2 vCPU. Carried through from the project's baseline and not scaled with team size, because for this workload memory is what runs out first.
The base figures are our estimate, derived from the services in the project's reference Docker Compose file, because it does not publish a minimum specification we could cite. The per-user increments are ours in every case. They are deliberately generous rather than optimistic: a comparison that undersizes the server flatters self-hosting.
Time, not just money
Zitadel is rated medium to operate, which in this model means about 6 hours to get it running properly the first time and 1.5 hours a month after that. At $75 an hour that is $450 once and $112 a month, which is usually the largest line in the whole calculation.
What it replaces
| Commercial product | Its cost at 10 people | Zitadel at 10 people | Break-even | |
|---|---|---|---|---|
| Auth0 Essentials (B2B) | $150 | $139 | 3.4 years | full breakdown |
| Clerk Pro | $25.00 | $139 | never | full breakdown |
Where to put Zitadel
2.5 GB of memory and 10.1 GB of disk is what this needs at 10 people. The cheapest plan that fits, among the providers whose prices we have read ourselves, is the Starter 4 GB at VPSServer for $22.00 a month.
We are not claiming this is the cheapest server on the internet. It is the cheapest one we can honestly quote. Hetzner Cloud, Vultr and PikaPods publish prices we could not read programmatically, and Hetzner in particular is usually cheaper per gigabyte of memory than anything quoted above. Price them yourself before you commit.
The VPSServer link above is an affiliate link, run through the same programme as our Kamatera link; VPSServer and Kamatera belong to the same group. If you sign up through it we may earn a commission, but the programme does not state an amount for VPSServer. That never changes the computed costs, which server is chosen, or the conclusion of this page. The sizing model and every price source are published in full.
Project facts
| Licence | GNU Affero General Public License v3.0 |
|---|---|
| Written in | Go |
| GitHub stars | 15,005 |
| Open issues | 1,175 |
| Latest release | v4.17.3 |
| Last commit | 2026-09-11 |
| Repository checked | 2026-09-12 |
| Project | zitadel.com · zitadel/zitadel |
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