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OpenNebula vs Scalr comparison

 

Comparison Buyer's Guide

Executive Summary

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

OpenNebula
Ranking in Cloud Management
19th
Average Rating
8.2
Reviews Sentiment
7.0
Number of Reviews
15
Ranking in other categories
No ranking in other categories
Scalr
Ranking in Cloud Management
27th
Average Rating
9.0
Reviews Sentiment
5.8
Number of Reviews
2
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2026, in the Cloud Management category, the mindshare of OpenNebula is 1.7%, down from 6.8% compared to the previous year. The mindshare of Scalr is 0.9%, up from 0.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Cloud Management Mindshare Distribution
ProductMindshare (%)
OpenNebula1.7%
Scalr0.9%
Other97.4%
Cloud Management
 

Featured Reviews

FOURES Jean-Philippe - PeerSpot reviewer
Products Manager at a tech services company with 501-1,000 employees
Reliable, simple to manage, and offers great technical support
The support of VXLAN fits with our network management. Thanks to this we can propose mixed solutions using virtual resources on OpenNebula and bare metal servers hosted in our facilities linked to each other on the sale network. This use case is very useful when some applications need bare metal power (Kubernetes workers, huge databases, AI models computations, et cetera). The cluster management is very useful for splitting our different clusters (mutual vs dedicated). We can manage deployments and capacity planning without pain. The API is also really simple and it helped us to develop the Terraform provider to manage OpenNebula like any other cloud infrastructure.
Shubham Mandavkar - PeerSpot reviewer
Associate Technical Consultant at a computer software company with 51-200 employees
Modern API design has transformed documentation workflows and supports interactive testing
Scalr helps with API testing and client functionality, which includes a built-in Try It tool similar to Postman, allowing developers to test endpoints, manage environment variables, and see request history. The faster response is due to the CI/CD workflow integrating with GitHub Actions and another tool to automatically update and version documentation as the codebase evolves. Other features include data formatting, where I can convert strings to uppercase, trim white spaces, or concatenate first and last names into a full name field. In scientific contexts, a scalar is a physical quantity described only by magnitude with no direction. In environmental aspects, monitoring and measuring temperature, pressure, or humidity, resource tracking, and calculating mass, volume, density, or time duration reflect the best impact on my organization. One specific outcome I have noticed is scholarly publishing. Scalr is also an open-source platform for born-digital, media-rich publishing, allowing scholars to create interactive online books that integrate high-resolution media with sophisticated archival structures.

Quotes from Members

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

Pros

"It is quite easy to deploy."
"OpenNebula is easy to deploy and manage compared to other solutions like OpenStack."
"The most valuable feature of OpenNebula is that it scales very well."
"It has enabled us to decrease the optics by around 55 to 60%."
"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."
"For our use case, we found the solution to be the best fit when dealing with infrastructure services."
"The service feature appeals most to us, thus it is the most valuable."
"It makes maintenance very easy and stress-free for our teams."
"I was able to deal with requests without needing every server on; I could turn them off."
"After all the years of helping enterprises implement API strategies at SmartBear, I can confidently say Scalr is what the industry has been waiting for."
 

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."
"The web interface could be better. It's not very difficult to use, but there's room for enhancement."
"Template management also needs improvement in OpenNebula because it's inferior right now."
"As with all enterprise software licensing, the pricing is not intuitive and must be negotiated; grandfathered contracts are better than anything offered today."
"The front-facing API can be improved to support lots of requests when the platform is huge with lots of virtual resources."
"Most of the competitors are offering some sort of billing software to transform their installation to work as a small-sized public cloud, but those offerings from OpenNebula are still missing."
"There are no payment gateways in OpenNebula."
"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."
"Regarding licensing, if I buy a licensing key, it is beneficial, but if I have a lesser standing, it is not as good."
"We did use AWS autoscaling but Rackspace left something to be desired."
 

Pricing and Cost Advice

"We use the Community Edition, rather than the Enterprise Edition."
"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."
"The solution is open source so is free."
"VRA is very expensive but OpenNebula is free."
"OpenNebula gives good value for money."
"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."
Information not available
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Top Industries

By visitors reading reviews
Financial Services Firm
12%
Comms Service Provider
10%
Computer Software Company
9%
University
7%
Manufacturing Company
23%
Computer Software Company
11%
Construction Company
11%
University
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business7
Midsize Enterprise6
Large Enterprise3
No data available
 

Questions from the Community

Ask a question
Earn 20 points
What needs improvement with Scalr?
Scalr can be improved by logical simplification, wrapping complex logic into reusable functions to keep main queries readable. Data validation using functions like is null provides default values w...
What is your primary use case for Scalr?
Scalr refers to several distinct technologies, with the most common modern use case involving API documentation and database function. Scalr is a modern alternative to Swagger UI used for creative ...
What advice do you have for others considering Scalr?
Scalr is deployed on-premises only because Scalr is a physical quantity fully described by magnitude value. Regarding the mathematical engine and scripting language, the core features are generally...
 

Comparisons

 

Overview

 

Sample Customers

Akamai, BBC, Fermilab, Terradue, Surf Sara, Produban, Netways, ESA, China Mobile, BlackBerry, Deloitte, Fuze, Telefonica, Trivago, Nokia, Encore Tech, Beeks.
JPL, Expedia, Samsung, Acxiom, Accenture, Sony, Merkle, Autodesk
Find out what your peers are saying about OpenNebula vs. Scalr and other solutions. Updated: June 2026.
902,988 professionals have used our research since 2012.