I am facing the decision to host keycloak myself as IAM for a multitenant SaaS or to use a cloud IAM like AWS Cognito / Google Identity Platform.
To be able to compare the costs, I would need to know how much it costs to run Keycloak professionally - i.e. with high availability, monitoring, maintenance, backups, etc.
Does anyone have concrete, experience based values for this?
For example, for a scenario with 50k / 100k / 200k / 500k monthly active users and 100 / 500 / 1000 tenants (= realms) - How many resources does the deployment need, how many staff hours for the operation etc.?
That would be very helpful, thank you!