"On Premise" implementation (within the company) vs SaaS implementation (in "Cloud")

Implement "OnPremise" (within the company)

Deploy "SaaS" (in "Cloud")

Advantages: The company IS the owner of the application and the data.
High application speed.
Running the application does not depend on the provider and the Internet connection.
The implementation (Data import and schooling) of the application can be performed at the company headquarters.
Easy customizations.
Maximum control over the access rights to the company data
Technical support: At the company's headquarters, "On Line" and Telefonic.

Advantages: Lower acquisition and maintenance costs.
The company must NOT have qualified IT&C personnel to keep the systems running.

Disadvantages: Higher acquisition and maintenance costs.
The company must have qualified IT & C staff to keep the systems running.

Disadvantages: The company is NOT the owner of the application and data.
Low application speed.
Running the application depends on the provider and the Internet connection.
The implementation (data import and schooling) of the application can NOT be performed at the company headquarters.
Customizations very difficult to perform.
Control minimum on access rights to company data.
Technical support only "OnLine" or by telephone.