Software as a Service (SaaS) is one reason that marketers can buy technology for themselves. But a recent survey by 451 Research for tech consultancy Dimension Data found that SaaS accounts for only 15% of application volume. Conventional (on-premise, non-cloud) environments had 24% share. The rest was split among on-premise private cloud (18%), hosted private cloud (15%), public cloud (14%), and off-premise non-cloud (13%). Cloud is expected to grow much faster than SaaS. The practical implication is that marketing technologists and Customer Data Platforms will be drawing data from many different environments for the foreseeable future, and will need cooperation from IT to do it.