Startup Idea : Unified platform for electronic bills

Everyone has utility services (gas, water, electricity, etc) and most companies provide their own site for their clients to access their bills. This is very frustrating since you have to keep track of different accounts, different sites and different UX. Then, there's no simple way for people to visualize their total expenditure, history, etc. My idea is to develop a unified, open source platform which companies can use in three ways: by their own (it's open source), as a cloud service (SaaS) or using our running platform on which users receive their bills automatically.