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 product. I rate the pricing an eight out of ten. It provides good value.

We are using the open-source version.

The solution is open-source and free.

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.

It is open source. We did not have to pay for any additional features.

The solution is open-source and free to use. 

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. You need to pay for your infrastructure and hosting charges, but those are the only fees that you are required to bear.

It's an open-source product, so there won't be any pricing. For licensing, it uses Apache open-source license.

We are not using the licensed version.

It is an open source product and comes free under license from the Apache foundation. If you need dedicated support or training, then you may have to pay. It depends on how you go about it.

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

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

It's free (open source).

Obviously OSS is free, so you can’t beat that when it comes to price. For the commercial support options, they are extremely fair for quality of the solution.