head to head · open source
rancher vs cloudstack
rancher has 25,924 GitHub stars, 3,221 forks, 3,371 open issues and last shipped 2 days ago. cloudstack has 3,075 stars, 1,385 forks, 1,048 open issues and last shipped 2 days ago. rancher leads on adoption by 743% (25,924 vs 3,075 stars). rancher is written in Go under Apache-2.0; cloudstack is written in Java under Apache-2.0. rancher has attracted 12% as many forks as stars, cloudstack 45%. rancher was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (kubernetes, orchestration), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| rancher | cloudstack | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 3.1K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Go | Java |
| Last push | 2026-09-19 | 2026-09-19 |
| Forks | ⑂ 3.2K | ⑂ 1.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick rancher if
- You weight community size — 26K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick cloudstack if
- You want the cloudstack feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and cloudstack fits your workflow better
About rancher
Rancher is an Apache 2.0 licensed, Go based open source container management platform for organizations that deploy containers in production and need to run Kubernetes everywhere while meeting IT requirements and empowering DevOps teams.
read the full rancher overview →
About cloudstack
Apache CloudStack is an open source Infrastructure as a Service (IaaS) cloud computing platform, written primarily in Java and released under the Apache 2.0 licence, that deploys and manages large networks of virtual machines for service providers, enterprises, and operators who need a cloud they control.
read the full cloudstack overview →
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Frequently asked questions
Is rancher or cloudstack more popular?
rancher has 25,924 GitHub stars and cloudstack has 3,075. rancher has the larger community by that measure.
Are rancher and cloudstack free?
Both are open source. rancher is licensed under Apache-2.0 and cloudstack under Apache-2.0. Neither carries a licence fee.
What is the difference between rancher and cloudstack?
rancher is written in Go and cloudstack in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, rancher or cloudstack?
Choose rancher if you want the larger community (25,924 stars) or its Apache-2.0 licence terms. Choose cloudstack if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.