This is a practical comparison based on real production use, not vendor marketing.
Quick Comparison
| Feature | Rocky Linux | AlmaLinux |
|---|---|---|
| Founded by | Gregory Kurtzer (CentOS co-founder) | CloudLinux |
| RHEL compatibility | 1:1 bug-for-bug | 1:1 ABI compatible |
| Governance | Rocky Enterprise Software Foundation | AlmaLinux OS Foundation |
| Release speed | Fast (days after RHEL) | Fast (days after RHEL) |
| Commercial support | CIQ | TuxCare, CloudLinux |
| Cloud images | All major clouds | All major clouds |
| Secure Boot | Yes | Yes |
The Honest Truth
Rocky Linux and AlmaLinux are functionally identical. Both are free, community-driven, enterprise-grade RHEL-compatible distributions. The differences are in governance and founding philosophy, not in the software.
When to Use Rocky Linux
- CentOS successor from its original co-founder
- RESF governance (community-controlled foundation)
- Peridot build system (fully reproducible builds)
When to Use AlmaLinux
- Backed by CloudLinux (profitable company, sustainable funding)
- First to deliver RHEL-compatible releases post-CentOS
- ELevate tool for migrating from CentOS 7/8
When to Use Neither
If you can afford RHEL subscriptions, use RHEL directly — you get vendor support, Red Hat Insights, and enterprise certifications. If you need a truly free alternative, both Rocky and Alma are excellent choices.
My Recommendation
Pick either one and standardize. Both are production-ready. I slightly lean toward AlmaLinux for its sustainable funding model and migration tooling, but Rocky Linux is equally solid. Book a consultation to plan your CentOS migration.
