SaaS is "as low cost as software" ... or, at least, the "Saa" part is It's the Service that you're paying for - not the Software You cannot rationally compare

SaaS is "as low cost as software" ... or, at least, the "Saa" part is It's the Service that you're paying for - not the Software You cannot rationally compare a provided Service to your "zero user support" offering People pay for SaaS precisely because it's simpler/cheaper (at least on some vectors of analysis) then running it yourself You can run a "free" email server, for example But the amount of cost you will incur doing so (time, effort to get other servers/services to accept you, etc) is almost guaranteed to be more than just paying someone who does that for their service