CloudStack vs OpenNebula comparison

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CloudStack

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Executive SummaryUpdated on Dec 17, 2024

CloudStack and OpenNebula are competing in the cloud infrastructure domain. OpenNebula has the upper hand due to its adaptability and ease of deployment across varied infrastructures.

Features: CloudStack offers comprehensive support for hybrid and multi-cloud environments, advanced networking, and security features, and a centralized management system for scalability. OpenNebula has a lightweight footprint, provides a user-friendly interface, and supports flexibility across both private and public cloud platforms.

Room for Improvement: CloudStack can improve by streamlining its resource-intensive deployment process, simplifying the customization process, and enhancing its support for newer virtualization technologies. OpenNebula could benefit from expanding advanced networking capabilities, increasing support for multi-cloud environments, and improving its integration with additional enterprise applications.

Ease of Deployment and Customer Service: OpenNebula is known for its straightforward deployment and strong customer support, making it easy to manage various cloud infrastructures. CloudStack's deployment may require more resources, but it provides extensive documentation and community support for users.

Pricing and ROI: CloudStack is an open-source solution, potentially involving higher initial expenses due to substantial customization and resource needs. OpenNebula, also open-source, presents lower setup costs and an attractive return on investment for small to medium-sized enterprises.

To learn more, read our detailed CloudStack vs. OpenNebula Report (Updated: November 2025).

CloudStack vs. OpenNebula

November 2025

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Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Categories and Ranking

CloudStack

Ranking in Cloud Management

7th

Average Rating

8.0

Reviews Sentiment

6.5

Number of Reviews

Ranking in other categories

No ranking in other categories

OpenNebula

Ranking in Cloud Management

6th

Average Rating

8.2

Reviews Sentiment

7.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of November 2025, in the Cloud Management category, the mindshare of CloudStack is 3.4%, down from 6.7% compared to the previous year. The mindshare of OpenNebula is 5.1%, down from 7.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Cloud Management Market Share Distribution
Product	Market Share (%)
CloudStack	3.4%
OpenNebula	5.1%
Other	91.5%

Cloud Management

Featured Reviews

Tharun Kumar Reddy Thamatam

Senior Infrastructure Consultant at Infosys

Achieving seamless infrastructure management with optimized network and user access controls

I believe enhancements could be made in CloudStack, particularly in the management servers. I had the opportunity to collaborate with one of the Apache CloudStack developers, leading to the installation of additional agents for better information retrieval from hypervisors. We implemented configurations, ensuring consistency across hosts and VMs. We also utilized Ansible or YAML files to automate password upgrades during patching activities and database management, showcasing our customization efforts for improvement. For future releases, it would be beneficial if Apache enhanced CloudStack by integrating alerting systems directly. We've had instances where hypervisors experienced overloads without prior alerts, so proactive alerts within the tool would better prepare us for addressing issues swiftly, preventing disruption in business operations. A portal summarizing system metrics alongside alert capabilities would greatly enhance our operational efficiency.

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Thomas Bennett

Manager, DevOps System Engineering team at MX

Robust with great CLI tools and UI

I've found OpenNebula upgrades to be more complex than those of some of the competitors and the support to be mediocre. I would also like to see more and better ancillary tools related to OpenNebula, for example, more robust tools for backups, user support, etc. The support knows their software stack reasonably well. However, OpenNebula depends on so many open-source projects that they lack expertise. As with all enterprise software licensing, the pricing is not intuitive and must be negotiated; grandfathered contracts are better than anything offered today.

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Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Pros

"Key features include stability, centralized management design that scales well, and transparent interoperability with different hypervisors and manufacturers.."

"The product gives us the ability to orchestrate large virtual environments and is flexible enough to allow us to configure it for what we need. We value the flexibility of the networking feature set as well as the ability to build virtual private clouds."

"It was easy to deploy, both for PoC and production (with HA)."

"It works, and pretty much always has. Reliability and support for enterprise features, with a multi-tenant interface, makes CloudStack a very compelling solution."

"Everything in CloudStack works effectively."

"The APIs for automation in CloudStack are excellent; everything is API-driven, and while the API is very rich and hard to learn, you can do everything you would want to do, including everything in the user interface and more."

"I liked the separation of the isolated network versus the shared network."

"The initial implementation process was quite good."

More CloudStack pros

"OpenNebula is lightweight, stable, and easy to customize."

"I also like the ability to build custom functions. I can define a function where I have two types of views and configure the dependencies. The virtual data centers concept allows me to define users. If a user wants to join certain kinds of machines, the host and the other user won't see them. It gives me the flexibility to define multiple views and data centers in one place."

"With a single click, we could set things up and initiate them."

"The service feature appeals most to us, thus it is the most valuable."

"What's best about OpenNebula that people like is that it's easy to deploy. It's also easy to manage. It's interesting because people choose OpenNebula over other solutions because of the ease of management."

"It is quite easy to deploy."

"The solution provides templates for configurations that can easily be exchanged to VMs."

"The ability to use it almost like a public cloud for an organization is a big asset, as it will create a value proposition and can control costs in a great way."

More OpenNebula pros

Cons

"A technology upgrade is one item which could be improved upon a lot."

"Lack of support for third-party software vendors such as Veeam and Zerto creates limitations on comprehensive offerings which would include backup and disaster recovery."

"My teammates have complained about the upgrade. The source code had massive files that had to be merged with our own development to upgrade to the latest version of CloudStack. It was quite painful for them. CloudStack could add some cost management tools to give me some control over the costs associated with the number of users of my services."

"Accounts, domains, and user accounts are set up with public cloud in mind, not private."

"The product could improve by embracing newer technologies like GPU virtualization."

"The installation of CloudStack can be quite challenging because you need a good understanding of the product before starting."

"This product needs a lot improvement on the development side. Every new version introduces new bugs. It lacks many features needed for NFV like DPDK, SR-IOV support, etc."

"It is not widely used so Google does not help very much when you are troubleshooting, and the CloudStack forum is not very active."

More CloudStack cons

"It should have a simple REST API like most other tools. It's the industry standard format. An XML-RPC API gives you an XML document that you have to convert and then do something with that. REST API endpoint provides outputs in a JSON document. I would also like to see support for user data or heat templates, which OpenStack offers, but OpenNebula doesn't have this yet."

"There are small things that are hard. For example, making sure that it is going to be installable on public clouds."

"The storage feature that they have is a bit confusing."

"The protocol for clusterization is rough and doesn't work well."

"The web interface could be better. It's not very difficult to use, but there's room for enhancement."

"They have been saying for the past two and a half years that they would develop a feature to hot-add RAM and CPU, but it does not work."

"The UI, monitoring, and alerting could benefit from further improvements."

"The front-facing API can be improved to support lots of requests when the platform is huge with lots of virtual resources."

More OpenNebula cons

Pricing and Cost Advice

"Give an effort to planning. If possible, contract a specialized consultant company for the initial setup and knowledge transfer."

"The solution is open-source and free."

"CloudStack is an open-source product."

"It is a 100% open-source solution needing just an Apache license. Also, there are no hidden fees to be paid."

"CloudStack is an open source solution, so you don't need to pay anything for it. When our company develops something specially for CloudStack, it is donated to the Apache Software Foundation and provided to anyone that wants to use it."

"The Apache CloudStack is open source, so you do not have licenses to purchase."

"As far as I know, CS is still free of charge. If you want to pay some money, Citrix Cloud Platform is based on CS, I think. As for hypervisors – everything as usual, you need to pay for VMware and vCenter. As for XenServer, recently they changed the free feature list, so you may need to pay some money to get useful features like XenMotion."

"There is no license, so the product is free unless you are buying professional technical support services."

"The licensing for OpenNebula used to be free, but now it's no longer free. A customer contacted me asking to move to another provider because of the changes in the licensing terms for OpenNebula. I have no information on how much the OpenNebula license is because the customer pays for it, and I only do the integration."

"VRA is very expensive but OpenNebula is free."

"The solution is open source so is free."

"We use the Community Edition, rather than the Enterprise Edition."

"OpenNebuoa has recently come up with a new subscription model that is economical and a lot of new customers are choosing this as it is an easy subscription model."

"OpenNebula gives good value for money."

See which vendors are best for you

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Top Industries

By visitors reading reviews

Computer Software Company

18%

Educational Organization

10%

Manufacturing Company

Comms Service Provider

Computer Software Company

17%

University

10%

Financial Services Firm

Comms Service Provider

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	13
Midsize Enterprise	6
Large Enterprise	12

By reviewers
Company Size	Count
Small Business	7
Midsize Enterprise	6
Large Enterprise	3

Questions from the Community

What do you like most about CloudStack?

The initial implementation process was quite good.

What is your experience regarding pricing and costs for CloudStack?

CloudStack is open-source, so there is no cost apart from learning. Billing solutions, if outsourced, come at a moderate cost.

What needs improvement with CloudStack?

Enhancements for CloudStack can focus on integrating more hypervisors, as mentioned regarding current features. We're working on a new feature that will allow for certain limited functions, but ove...

What do you like most about OpenNebula?

The live migration feature has been great and is something we use very often.

What is your experience regarding pricing and costs for OpenNebula?

OpenNebula gives good value for money.

What needs improvement with OpenNebula?

The web interface could be better. It's not very difficult to use, but there's room for enhancement. Another area for improvement is the integration with hardware to manage the lower layer of the n...

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Product Reports

Download CloudStack product report

CloudStack

November 2025

Download OpenNebula product report

October 2025

Also Known As

Vmops, Cloud.com

No data available

Overview

Apache CloudStack is open source software designed to deploy and manage large networks of virtual machines, as a highly available, highly scalable Infrastructure as a Service (IaaS) cloud computing platform.

Apache

OpenNebula provides the most simple but feature-rich and flexible solution for the comprehensive management of virtualized data centers to enable private, public and hybrid IaaS clouds. OpenNebula interoperability makes cloud an evolution by leveraging existing IT assets, protecting your investments, and avoiding vendor lock-in.

OpenNebula is a turnkey enterprise-ready solution that includes all the features needed to provide an on-premises (private) cloud offering, and to offer public cloud services.

Sample Customers

GreenQloud, Exoscale, TomTom, ASG, PC Extreme, ISWest, Grid'5000

Akamai, BBC, Fermilab, Terradue, Surf Sara, Produban, Netways, ESA, China Mobile, BlackBerry, Deloitte, Fuze, Telefonica, Trivago, Nokia, Encore Tech, Beeks.