Last updated: March 2026
Self-hosting a production-grade Keycloak cluster costs a minimum of $1,250 per month for infrastructure, basic security, and part-time operational labor — and that figure rises sharply once compliance audits, incident response, and unplanned maintenance are factored in. This analysis breaks down each cost category so you can make an informed decision between self-hosting and managed hosting.
This analysis assumes a high-availability cluster designed to serve thousands of users. Three cost categories apply regardless of the deployment method (Kubernetes, VMs, Docker Swarm, or bare metal):
- Infrastructure: Virtual machines, database, and reverse proxy.
- Security & Compliance: Network security, TLS, and regulatory audit costs.
- Operation: Ongoing maintenance, patching, and incident response labor.
Infrastructure
For this discussion, let’s simplify the infrastructure cost calculation by considering the following setup throughout the blog:
- A Keycloak cluster consisting of 3 nodes, each equipped with 16GB of RAM and 4 CPUs.
- A PostgreSQL instance for database needs, featuring 500GB of storage, 2 CPUs, and 8GB of RAM.
- A Reverse Proxy (such as Nginx or HAProxy) setup with 2 CPUs and 8GB of RAM, handling TLS termination.
We’ll also assume the use of local caching for efficiency. Given the importance of availability, each component is strategically placed in different physical locations (across zones or regions) to mitigate single points of failure, ensuring latency between instances does not significantly impact performance. For more on cluster configuration, see our guide on top 7 Keycloak cluster configuration best practices.
When discussing the orchestration of an application like Keycloak, it’s crucial to consider the infrastructure costs, which primarily revolve around CPU and RAM requirements. For the purposes of this blog, we’ll simplify by assuming the use of Virtual Machines (VMs). While more complex setups may involve container orchestration platforms like Kubernetes, the primary cost considerations remain the CPU and RAM.
Renting VMs for the system will comprise of:
- Keycloak Cluster: For a robust setup, renting 3 VMs, each with 4 CPUs and 16GB of RAM, is suggested. The cost per VM can vary between $80 to $260 monthly. For simplicity, we’ll estimate $170 per month for each VM, leading to a total of $510 per month for the cluster.
- Database and Reverse Proxy: Additionally, 2 VMs with 2 CPUs and 8GB of RAM will support the database and reverse proxy services. Costs here range from $40 to $160 per VM monthly. Averaging this to $100 per VM gives us a total of $200 per month for these services.
This setup, sourced from a reputable cloud provider, would thus approximate $610 monthly.
Security & Compliance
Ensuring the security of your Keycloak instances and PostgreSQL cluster is paramount. Basic security measures necessitate network configurations that prevent unauthorized access, adding both time and cost to the setup. This may include the use of Internet and NAT gateways along with proper routing to manage traffic securely, potentially adding additional costs.
To ensure your cluster’s secure communication, you’ll need to establish internet and NAT gateways, alongside configuring routing tables for optimal traffic flow. Simplifying for this discussion, we’ll allocate one instance for each function at $80 each, totaling an additional $160 per month.
This scenario doesn’t yet factor in a firewall setup. It’s a straightforward case, but even this simple setup demands careful planning and testing to ensure security.
Adhering to minimum security best practices might lead to compliance audits like SOC, ISO, or GDPR requirements. The costs for these can be significant, potentially adding $100,000 in fees, though we’ll omit these from our basic calculations due to their variability.
Operation
With your cluster up and running, operational challenges can arise, such as:
- One instance runs out of memory
- One instance goes down due to hardware malfunction
- One instance was in a degraded state and the provider needed to restart it
- Your TLS certificate expired and you didn’t notice
- There is a new CVE that is now exposed and targets all PostgreSQL 15 which you are using
- etc.
These are just a few examples. Any infrastructure engineer will tell you that maintaining a system’s uptime is an ongoing task with a never-empty to-do list. Here is a comment from an IAM engineer complaining about maintaining the infra for an open source IAM solution.
I have zero experience with Keycloak, but if you don’t have the resources to manage it, don’t implement an open source IAM solution. You’re just asking for trouble.
I am a dedicated IAM engineer using a major cloud solution and it is absolutely a full time job.
I would just bite the bullet and use Azure/Okta/Ping/ForgeRock unless you are really strapped for cash or have unique data security concerns.
The_Security_Ninja
For operational maintenance, let’s assume an optimistic scenario where your cluster needs just three hours of upkeep per week. Assuming you have an entry-level engineer skilled in OS, database management, networking, and more, at a cost of $30/hour, this would equate to an additional $360 per month.
This budget should suffice for routine maintenance and support as needed, bringing us to a total monthly cost a minimum of $1,250/month for hosting a Keycloak cluster capable of managing thousands of users.
Consider Skycloak as a Managed Alternative
All of the operational costs outlined above — infrastructure provisioning, security hardening, compliance, patching, and ongoing maintenance — are exactly what a managed Keycloak hosting service handles for you. Skycloak provides fully managed Keycloak clusters with built-in high availability, automated upgrades, and SLA guarantees so your team can focus on building your product instead of managing IAM infrastructure.
To compare the total cost of self-hosting against a managed solution, try the Skycloak ROI Calculator. You can also review our pricing plans to see how managed Keycloak fits your budget.
Does $1,250/month seem an affordable or costly venture for handling such a significant user base with a high-availability cluster? How much do you really think you would pay?
Frequently asked questions
How much does it really cost to self-host Keycloak?
A minimal production-ready cluster — three Keycloak nodes, one PostgreSQL instance, and a reverse proxy — costs approximately $610/month in VM fees plus $160/month in network security infrastructure. Add three hours of weekly maintenance at an entry-level engineering rate and the total reaches around $1,250/month. That estimate excludes compliance audits (SOC 2 or ISO 27001 can add $100,000 or more), incident response, and unplanned outages.
What are the hidden costs of self-hosting Keycloak?
Beyond raw infrastructure, the largest hidden costs are operational labor and compliance. Patching CVEs, managing TLS certificate renewals, tuning Infinispan clustering, scaling for traffic spikes, and performing zero-downtime upgrades all require dedicated engineering time. Compliance audits — required for many healthcare, financial services, and enterprise SaaS companies — are separate recurring expenses. Security monitoring, alerting, and on-call coverage add further cost that is easy to underestimate at the outset.
What is the minimum viable Keycloak setup for production?
The minimum production setup requires at least two Keycloak nodes (for high availability), a PostgreSQL database in a separate availability zone, and a reverse proxy or load balancer for TLS termination. Running a single-node Keycloak instance creates a single point of failure — any restart or crash means an authentication outage for all users. The three-node cluster described in this analysis is a conservative starting point for a service that needs to maintain uptime SLAs.
Is managed Keycloak hosting cheaper than self-hosting?
For most teams, yes — especially once engineering time is priced in. A managed service like Skycloak replaces infrastructure provisioning, security hardening, patching, upgrades, and 24/7 monitoring with a predictable monthly fee. Use the IAM ROI Calculator to compare your specific infrastructure and labor costs against managed pricing.
If you don’t even want to think about it, contact us and we will help you get where you want with Keycloak.
