You missed two thirds of my comment. This was in order of preference. If you can, use free software that you can fix and support yourself if need be. If not, b

You missed two thirds of my comment. This was in order of preference. If you can, use free software that you can fix and support yourself if need be. If not, buy the software and run it yourself, so you can at least control its operation. The last option is to by SaaS, and if you do, you need to have contingency plans in case it goes away. You should take this risk seriously, and factor it in to your decision when buying SaaS, and invest the engineering resources to make sure you aren't overly dependent on it.