Zitadel · Identity and SSO
Self-hosting Zitadel for 100 people: the cost
At 100 users, Zitadel needs 2.7 GB of memory and 11 GB of disk. That fits the CX23 (cost-optimized) at Hetzner Cloud for $6.70 a month. Add backups and the time it takes to look after and the real figure is $121 a month.
- Server
- $6.70CX23 (cost-optimized), 2 vCPU
- Backups
- $1.34provider snapshots
- Your time
- $1121.5 h a month at $75
- All in
- $121per month
- First-time setup
- $450about 6 hours, once
How 2.7 GB was arrived at
2 GB covers the stack at rest, every container the project ships included. 100 users at 2 MB each adds 0.2 GB, giving 2.2 GB. Adding 25% headroom so the machine is not run at its ceiling gives 2.7 GB, and the smallest plan at or above that is the CX23 (cost-optimized) with 4 GB.
Disk works the same way: 10 GB to begin with, plus 0.01 GB per user, so 11 GB against the 40 GB the plan includes.
Go binary over PostgreSQL, with an event-sourced audit log. Lighter than the JVM option and closer to Auth0's developer ergonomics.
Over three years
| Period | Server and backups | Your time | Total |
|---|---|---|---|
| Setup, once | — | $450 | $450 |
| Per month | $8.04 | $112 | $121 |
| First year | $96.48 | $1,800 | $1,896 |
| 36 months | $289 | $4,500 | $4,789 |
If you do not price your own time, the 36-month figure is $289 instead. Both numbers are real; which one applies depends on whether the hours would otherwise have been billable.
What you would be paying instead at this size
| Commercial product | Tier | Per month | Difference | |
|---|---|---|---|---|
| Auth0 | Essentials (B2B) | $150 | $29.46 | breakdown |
| Clerk | Pro | $25.00 | -$95.54 | breakdown |
A positive difference means self-hosting is cheaper at this size, with your time already counted.
Where to put Zitadel
2.7 GB of memory and 11 GB of disk is what this needs at 100 people. The cheapest plan that fits, among the providers whose prices we have read ourselves, is the CX23 (cost-optimized) at Hetzner Cloud for $6.70 a month.
Go to Hetzner Cloud Compare hosts
We are not claiming this is the cheapest server on the internet. It is the cheapest one we can honestly quote. Vultr and PikaPods publish prices we could not read programmatically, and may well undercut it. Price them yourself before you commit.
Get the migration checklist for this tool
A one-page pre-flight list: data export path, sizing, backup plan, and the rollback step most people skip.