Is Amazon RDS or Keycloak better?

Neither clearly leads. Amazon RDS starts at Free and Keycloak at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Amazon RDS or Keycloak?

Amazon RDS starts at Free and Keycloak at Free.

Does Amazon RDS or Keycloak run on more platforms?

Amazon RDS runs on Web, Multi-AZ, Multi-region. Keycloak runs on Self-hosted, Linux, Windows, API.

Can I use Amazon RDS for free?

Both have a free tier, so you can try either at no cost before committing.

What is Amazon RDS best used for?

Amazon RDS is most often used for transaction processing, data storage, application backend, reporting. Of those, transaction processing and data storage are not what Keycloak is typically brought in for.

What can Amazon RDS do that Keycloak cannot?

Amazon RDS covers Multiple DB Engines, Automated Backups, Multi-AZ Deployment, Read Replicas.

Databases · head to head

Amazon RDS vs Keycloak

Amazon RDS

Databases

Set up, operate, and scale a relational database in the cloud

From: Free
Free plan: Yes

Visit Amazon RDS Full review

Keycloak

Developer Tools

Open-source identity and access management server.

From: Free
Free plan: Yes

Visit Keycloak Full review

The short version

Keycloak is an open-source IAM platform supporting OpenID Connect, OAuth 2.
Both are free.
Where Amazon RDS falls short: no super-user access or direct host connectivity limits advanced customization.
Where Keycloak falls short: requires self-hosted deployment and operational expertise to install, configure and maintain.
Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Amazon RDS and Keycloak actually diverge.

Attributes where Amazon RDS and Keycloak differ
Attribute	Amazon RDS	Keycloak
Pricing model	Usage-based	Open-source
Platforms	Web, Multi-AZ, Multi-region	Self-hosted, Linux, Windows, API
Category	Databases	Developer Tools

Identical on both: starting price (Free), free tier (Yes).

Not yet recorded: founded for Keycloak.

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Amazon RDS

Multiple DB Engines
Automated Backups
Multi-AZ Deployment
Read Replicas
Encryption
Performance Insights
Automatic Scaling
MySQL

Only in Keycloak

Nothing recorded that Amazon RDS does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Amazon RDS

Transaction processingnot Keycloak
Data storagenot Keycloak
Application backendnot Keycloak
Reportingnot Keycloak
Data analyticsnot Keycloak

Keycloak

Organisations requiring self-hosted identity infrastructure for compliance or data residencynot Amazon RDS
Companies with existing LDAP/Active Directory systems needing federated authenticationnot Amazon RDS
Open-source projects and communities requiring free IAM without licensing costsnot Amazon RDS
Enterprises building custom identity workflows requiring fine-grained authorisationnot Amazon RDS
Teams with sufficient operational expertise to manage infrastructurenot Amazon RDS

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Amazon RDS

No super-user access or direct host connectivity limits advanced customization
Pricing unpredictable and expensive compared to GCP alternatives with equivalent features
Limited access to system procedures and tables requiring advanced permissions
No Oracle RAC (Real Application Clusters) support for high-availability Oracle deployments

Keycloak

Requires self-hosted deployment and operational expertise to install, configure and maintain
No managed cloud option provided by Red Hat; organisations must operate infrastructure themselves or use third-party distributions
Clustering and high-availability configurations require additional operational knowledge
Community support only; commercial support requires third-party vendors or distributions

Pricing, plan by plan

Amazon RDS

Free

On-Demand InstancesOn request
Reserved InstancesOn request
Database Savings PlansOn request

Keycloak

Free

Open-sourceFree
- Full platform functionality
- Self-hosted deployment
- Community support

Which should you pick?

Choose Amazon RDS if

You need multiple db engines.
You want to start without paying.
You work on Web, Multi-AZ, Multi-region.
You also want automated backups.

Amazon RDS review

Choose Keycloak if

You want to start without paying.
You work on Self-hosted, Linux, Windows, API.

Keycloak review

Questions people ask

Is Amazon RDS or Keycloak better?: Neither clearly leads. Amazon RDS starts at Free and Keycloak at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Amazon RDS or Keycloak?: Amazon RDS starts at Free and Keycloak at Free.
Does Amazon RDS or Keycloak run on more platforms?: Amazon RDS runs on Web, Multi-AZ, Multi-region. Keycloak runs on Self-hosted, Linux, Windows, API.
Can I use Amazon RDS for free?: Both have a free tier, so you can try either at no cost before committing.
What is Amazon RDS best used for?: Amazon RDS is most often used for transaction processing, data storage, application backend, reporting. Of those, transaction processing and data storage are not what Keycloak is typically brought in for.
What can Amazon RDS do that Keycloak cannot?: Amazon RDS covers Multiple DB Engines, Automated Backups, Multi-AZ Deployment, Read Replicas.

Answered from the vendors’ own pages

Amazon RDS: What is included in the AWS Free Tier for RDS?

For signups before July 15, 2025: 750 hours per month of single-AZ database instance usage (12 months), 20 GB General Purpose SSD storage monthly, 20 GB automated backup storage monthly, available engines include MySQL, MariaDB, PostgreSQL, SQL Server Express Edition. For signups after July 15, 2025: choice between Free Plan or Paid Plan, $100 in credits plus up to $100 additional credits for activating foundational services, credits valid 12 months. Free Tier unavailable in AWS GovCloud (US) and China (Beijing) regions.

Source

Keycloak: What protocols does Keycloak support?

Keycloak supports OpenID Connect, OAuth 2.0 and SAML 2.0 protocols for authentication and authorisation.

Source

Amazon RDS: How is data transfer priced in RDS?

Same Availability Zone (EC2 to RDS) is free. Multi-AZ replication is free. Cross-AZ within same region is 0.01 USD per GB in and out. Cross-region snapshots and backups follow standard data transfer charges.

Source

Keycloak: Can Keycloak integrate with existing user directories?

Yes. Keycloak supports user federation with LDAP and Active Directory systems, allowing organisations to leverage existing user directories.

Source

Amazon RDS: What database engines are supported by RDS?

Aurora, MySQL, PostgreSQL, MariaDB, Oracle, SQL Server, and IBM Db2. Pricing varies by engine.

Source

Keycloak: Is Keycloak free?

Yes. Keycloak is fully open-source and free to deploy and use. No licensing fees are required.

Source

Amazon RDS: What cost components are included in RDS monthly pricing?

DB instance hours (billed in 1-second increments, 10-minute minimum), storage per GB per month, I/O requests (Aurora and magnetic storage only), provisioned IOPS per month, backup storage, and data transfer fees.

Source

Amazon RDS vs Keycloak

Amazon RDS

Keycloak

The short version

Where they differ

What each one covers

Only in Amazon RDS

Only in Keycloak

What people use each for

Amazon RDS

Keycloak

Where each one falls short

Amazon RDS

Keycloak

Pricing, plan by plan

Amazon RDS

Keycloak

Which should you pick?

Choose Amazon RDS if

Choose Keycloak if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Amazon RDS

More on Keycloak

Keep looking

Other head to heads