Hi there,
Mortgaging a property using a home loan from a Swiss insurance company is little different to mortgaging a propert to a bank. Affordability requirements are similar, although eligibility requirements (the condition and location of the property in question, for example) are often more stringent.
Insurance companies often offer only mid- to long-term mortgages, but interest rates on these are often competitive.
You can compare mortgages from insurance companies with mortgages from banks and pension funds using the unbiased mortgage comparison on moneyland.ch.
Best regards from Moneyguru