Product Manager of PostageApp (http://www.postageapp.com http://www.postageapp.com) here, we are B2B SaaS and we used a tiered model. We chose to go in this di

Product Manager of PostageApp (http://www.postageapp.com http://www.postageapp.com) here, we are B2B SaaS and we used a tiered model. We chose to go in this direction because it allowed for a few things: better predictability in terms of cash flow and better predictability in the amount of resources needed. Having those two is somewhat critical to our success, hence why the tiered subscription model works best for us.