Hello, this is very interesting question. the answer depends on some factors which follows company's circumstances so to start with, how much in your budget for this matter ? keeping self hosted software costs a lot in the infrastructure you will need infrastructure such as server(s) and other stuff which will cost big initial investments, on the other hand using SaaS excludes all these costs which usually is a major part of the decision. on the other hand using SaaS transfers the risk to the operator of such SaaS to take care of the "risk" of maintain the security and the data. So i would recommend going to reputable SaaS where its servers (where your company's data is kept) in a country has very strict regulation on data security to ensure that your data is protected enough. hope this helps.