For a tech startup expecting unpredictable growth and aiming for global reach without substantial initial investment in hardware, the public cloud is an excellent choice. It offers rapid scalability and a pay-as-you-go structure, which is ideal for a service that might require scaling up or down at a moment's notice. Other models such as private, hybrid, or community clouds involve more hands-on management and are less suitable for a company with a potentially explosive growth pattern that seeks low upfront costs.