AlmaLinux and Rocky Linux are two popular enterprise Linux distributions that provide free, RHEL-compatible alternatives for servers, cloud environments, development, and production workloads. Both were created after Red Hat announced changes to CentOS, which shifted the role of CentOS toward CentOS Stream in 2020. Since then, AlmaLinux and Rocky Linux have developed independently, with differences in how their projects are governed, funded, and maintained.
For most everyday server workloads, both distributions provide a familiar Enterprise Linux environment and support many of the same tools, packages, and applications. The more important differences involve governance, RHEL compatibility, release management, support options, and the surrounding ecosystem. This guide compares AlmaLinux and Rocky Linux across these areas to help you understand the differences and make an informed choice for your next deployment.
Quick Differences at a Glance:
- AlmaLinux is backed by CloudLinux and governed by a nonprofit foundation with an open board.
- Rocky Linux is steered by the Rocky Enterprise Software Foundation (RESF), founded by original CentOS co-founder Gregory Kurtzer.
- Both track RHEL point releases closely, usually within a few days to a couple of weeks.
- Package compatibility with RHEL is effectively 1:1 for both, so most third-party RPMs work the same way.
- AlmaLinux offers an ABI compatibility promise rather than strict bug-for-bug compatibility in some edge cases.
- Both support x86_64, aarch64, and other common server architectures.
If you already run production workloads on either one, you probably will not gain much by switching. The bigger decision point for AlmaLinux vs Rocky Linux is new deployments, and that is what this guide focuses on.
Quick Comparison :
Governance : AlmaLinux (nonprofit foundation) vs Rocky Linux (RESF)
Primary sponsor : CloudLinux (Alma) vs CIQ (Rocky)
Release model : Both track RHEL minor releases closely
Compatibility promise : ABI-compatible (Alma) vs bug-for-bug (Rocky)
Note:
I ran both distros side by side on identical VMs for a few weeks before writing this, one on a local KVM host and a second pair on a cloud VPS to check how they behaved under real network conditions rather than a lab bubble. If you want to try the same thing yourself without owning hardware, a cheap DigitalOcean droplet is enough to spin up both and compare boot time, package installs, and update behavior in an afternoon.
Origin and Governance
Rocky Linux was created almost immediately after the CentOS Stream announcement, led by Gregory Kurtzer, who had also founded the original CentOS project years earlier. It is now stewarded by the Rocky Enterprise Software Foundation, a member-based nonprofit that includes companies like CIQ, Google Cloud, and AWS on its board.
AlmaLinux started as an internal project at CloudLinux before being spun off into its own nonprofit foundation. CloudLinux still funds a large part of the development, but the project has its own board and community contributors separate from CloudLinux's commercial products.
Neither model is inherently safer. What matters is that both have survived past their first couple of years, both ship security patches quickly, and neither has shown signs of the kind of sudden policy shift that killed the old CentOS.
The governance split matters more since June 2023, when Red Hat changed how it distributes RHEL source code and limited public access to git.centos.org. That move forced both projects to rethink how they stay compatible.
AlmaLinux responded by pivoting to an ABI compatibility model, meaning it does not promise a byte-for-byte rebuild anymore but focuses on staying application and binary compatible, which also gives it more room to ship its own security patches ahead of upstream when needed. Rocky Linux went the other direction and doubled down on strict bug-for-bug compatibility, sourcing RHEL content through Red Hat's public cloud images and UBI containers to keep rebuilding it as close to a 1:1 match as it can. Neither approach is wrong, but it explains why you will see the two projects described differently in release notes going forward.
Release Cycle and Rebuild Speed
This is where small differences show up. AlmaLinux has generally been a bit faster getting new RHEL point releases out, sometimes shipping within a day or two of the upstream release. Rocky Linux has closed that gap significantly over the last couple of years and now usually lands within a similar window.
For most people running production servers, a few days of difference does not matter. It becomes relevant only if you are chasing a specific CVE fix the same week it drops, in which case it is worth checking both changelogs before deciding.
Package Compatibility and Repositories
On the package management side, AlmaLinux vs Rocky Linux is basically a non-issue. Both distros use DNF as the package manager, and both pull from the same general pool of RPM-compatible repositories, including EPEL. If you have scripts, Ansible playbooks, or Puppet manifests written for RHEL or CentOS, they will run on either one with essentially no changes.
One thing I would avoid is mixing repositories from both projects on the same machine. It usually works fine for a while, then breaks in a confusing way during a routine update.
Warning:
Do not add AlmaLinux and Rocky Linux repositories to the same system, even temporarily to grab a package you cannot find elsewhere. The base packages themselves are not the problem since both trace back to the same RHEL sources. The real issue is that DNF loses track of which repo is authoritative for a given package, so version pinning and update tracking start behaving unpredictably on the next sync. If you are under a CIQ or CloudLinux commercial support contract, mixing repos this way also voids that agreement, since neither vendor can guarantee a supported state once packages start coming from the other project's channel. If it happens on a production box, recovering cleanly usually means rebuilding rather than trying to untangle it live.
Community, Support, and Ecosystem
Rocky Linux has a large, active community forum and channels on most major chat platforms. CIQ also sells commercial support contracts for organizations that need an SLA, similar to how Red Hat sells RHEL support.
AlmaLinux's community is smaller but responsive, and CloudLinux offers paid support plans as well. If your team is already using CloudLinux products for shared hosting, staying in that ecosystem can simplify vendor relationships.
Neither distro has the sheer volume of Stack Overflow answers that Ubuntu does, but because both are RHEL rebuilds, almost anything written for CentOS 7 or 8, or for RHEL itself, still applies. Our RHEL vs Ubuntu Server comparison covers this compatibility angle in more depth if you are weighing an Enterprise Linux family distro against something outside it entirely.
Cloud and Hosting Availability
Both AlmaLinux and Rocky Linux have official images on AWS, Google Cloud, Azure, and most major VPS providers. Availability used to favor Rocky slightly in the early days, but at this point both are close to universal across cloud marketplaces.
If you are testing on a budget host before committing to a provider for production, our VPS hosting comparison lists providers that carry both images, which makes it easier to run the same side-by-side test I did.
AlmaLinux vs Rocky Linux: Which One Should You Choose
Pick Rocky Linux if community governance and a larger, more visible user base matter to you, or if you want to align with a project whose foundation includes major cloud vendors on its board.
Pick AlmaLinux if you want a slightly faster release cadence historically, or if you are already in the CloudLinux ecosystem for hosting-related tooling.
Honestly, when it comes to AlmaLinux vs Rocky Linux for a typical LAMP stack, a Kubernetes node, or a basic file server, either one will do the job without drama. If you are still deciding between an Enterprise Linux distro and something like Debian for a new server build, our Debian vs RHEL for servers guide and Debian vs Ubuntu breakdown are worth a read before you commit either way.
Before You Deploy Either One:
A quick checklist I run through with clients before locking in a choice.
- Confirm your monitoring and backup tooling officially supports the distro you pick, not just "RHEL-compatible" in general.
- Check if your team wants a commercial support contract, and compare CIQ vs CloudLinux pricing if so.
- Walk through our Rocky Linux installation guide if you land on Rocky, to avoid common first-install mistakes.
- Run through a server hardening checklist before exposing either distro to the internet.
- If this is a dev workstation rather than a server, our best Linux distros for developers list might point you somewhere else entirely.
Conclusion
When it comes down to AlmaLinux vs Rocky Linux, both distros do what CentOS used to do, and they do it well. The choice mostly comes down to governance preference and support ecosystem rather than any real technical gap. If you are brand new to Enterprise Linux distros altogether, our best Linux distro for beginners guide is a good place to sanity check the decision. Drop me your feedback or comments. Feel free to share this article with others if you like it.
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Questions I Get Asked About This All the Time
Can I migrate an existing CentOS 7 or 8 server directly to either one?
Both projects publish migration scripts, AlmaLinux has almalinux-deploy and Rocky has migrate2rocky. They work reasonably well for straightforward setups, but I always recommend testing on a snapshot or clone first. Complex servers with custom kernel modules or heavily modified configs sometimes need manual cleanup after the script runs.
Is one of them more secure than the other?
Not in any meaningful way. Both pull security patches from the same upstream RHEL sources and typically release them within a similar window. Your actual security posture depends far more on how you configure firewalld, SELinux, and your update schedule than on which rebuild you picked.
Which one has better long term stability as a project?
Both have now been around long enough to prove they are not going anywhere overnight. Rocky Linux has broader institutional backing through its foundation membership, while AlmaLinux has a clear single sponsor in CloudLinux. Neither structure has shown cracks so far, but if you want maximum reassurance from a wide sponsor base, Rocky's model reads slightly stronger on paper.
Do package repositories like EPEL work the same on both?
Yes. EPEL, RPM Fusion, and most third-party RPM repositories are built against RHEL compatibility, not a specific rebuild, so they install and behave identically on either distro. You should not run into repo-specific quirks for the vast majority of packages.
Can I run AlmaLinux and Rocky Linux containers together in the same Kubernetes cluster?
Technically yes, since both produce standard OCI-compatible container images and the kernel underneath does not care which userland built the image. In practice I would still standardize on one base image across a cluster to keep your CI pipelines and vulnerability scanning simpler.
If I am already happy with Rocky or Alma, is there any reason to switch?
Honestly, no, not unless something specific changes, like your support vendor relationship shifting or a compliance requirement pointing you toward one project's governance model. Switching a working production fleet just to chase a marginally faster release cadence usually is not worth the operational risk.
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