Hello World,
Most of the clients face this issue, they get confused by seeing the advertisements and online offers.
There are many different companies who have different kinds of tech to offer,for example if you post a requirement that you need a particular project to be developed you will get various quotations which may vary drastically. The technology offered will also be different and the marketing agents will also push for there product, so in this case which product suits your requirement the best. You must choose your tech partners very wisely as the product desired is just in your thoughts and you will experience it later once developed.