Fundamentally private cloud is seen as more secure with higher levels of control for the owner, however public cloud is seen to be more flexible and requires less time and money investment from the user.<ref>{{cite web|title= The Bumpy Road to Private Clouds| url=http://www.computerworld.com/article/2549867/data-center/the-bumpy-road-to-private-clouds.html |accessdate=2014-10-08}}</ref>
==Cloud Marketplaces==
Cloud providers and other third-party brokers offer to end-users and developers cloud solutions through [[online marketplace]] environments.<ref>{{cite web | title = Cloud Marketplace definition | date = November 2013 | url = http://searchcloudprovider.techtarget.com/definition/cloud-marketplace | accessdate = 29 December 2014}}</ref> These [[e-commerce]] sites have as primary objective to simplify the consumers' access to the various cloud products and services and optimize and facilitate their management across the [[Cloud computing#Service models|cloud stack layers]]. The cloud marketplaces operate either as part of the cloud provider's ecosystem or as independent business entities which sell cloud-based solutions using resources and services from public clouds.<ref>{{Citation | title = Cloud-Marketplace: New paradigm for e-marketplaces | series = Proceedings of the tenth ACM international conference on Embedded software | publisher = ACM | pages = 1–8 | year = 2010 | doi = 10.1145/1879021.1879022 | url = http://dx.doi.org/10.1145/1879021.1879022}}</ref> Through the cloud marketplaces, software,
[[Bundled software|bundles]], exploiting techniques for automated instantiation, deployment and management, and allowing for centralized monitoring, accounting and billing.<ref>{{Citation | title = 4CaaSt marketplace: An advanced business environment for trading cloud services | series = Future Generation Computer Systems | volume = 41 | publisher = [[Elsevier]] | pages = 104–120 | year = 2014 | doi = 10.1016/j.future.2014.02.020 | url = http://dx.doi.org/10.1016/j.future.2014.02.020}}</ref> These bundles include [[application servers]], [[databases]], [[software libraries]] and [[virtual machines]] but practically any type of software and technology can be attached using orchestration and configuration tools such as [[Chef (software)|Chef]], [[Puppet (software)|Puppet]] and [[Juju (software)|Juju]].
Cloud marketplaces also incorporate the typical features of the modern online marketplaces for rating and feedback on the various offerings from the consumers, settlement, payments and [[analytics]], which are adapted for cloud-based software and service products. Additionally, cloud marketplaces may also provide mechanisms for [[Service-level agreement|SLA]] Negotiation and Management,<ref>{{Citation | title = Automatic SLA Matching and Provider Selection in Grid and Cloud Computing Markets | series = Proceedings of the 2012 ACM/IEEE 13th International Conference on Grid Computing | publisher = ACM/IEEE | pages = 85–94 | year = 2012 | doi = 10.1109/Grid.2012.18 | url = http://dx.doi.org/10.1109/Grid.2012.18}}</ref> analysis of application requirements and dependencies,<ref>{{Citation | title = A Business Resolution Engine for Cloud Marketplaces | series = Third International Conference on Cloud Computing Technology and Science (CloudCom) | publisher = [[IEEE]] | pages = 462–469 | year = 2011 | doi = 10.1109/CloudCom.2011.68 | url = http://dx.doi.org/10.1109/CloudCom.2011.68}}</ref> trust management,<ref>{{Citation | title = Towards a Trust Management System for Cloud Computing | series = 10th International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom) | publisher = [[IEEE]] | pages = 933–939 | year = 2011 | doi = 10.1109/DASC.2011.38 | url = http://dx.doi.org/10.1109/TrustCom.2011.129}}</ref> flexible pricing (e.g. spot instances) <ref>{{Citation | title = Dynamic Resource Allocation for Spot Markets in Cloud Computing Environments | series = Fourth IEEE International Conference on Utility and Cloud Computing (UCC) | publisher = [[IEEE]] | pages = 178–185 | year = 2011 | doi = 10.1109/UCC.2011.33 | url = http://dx.doi.org/10.1109/UCC.2011.33}}</ref> and cost calculation. In that sense, the consumers can focus on the application features and its business aspects, using the marketplace as the single point of access for the various technologies and cloud resources required for the delivery of the application.
