Pedantic analysis: At 5 Watts and $0.30 per kilowatt-hour, a Raspberry Pi would cost $1.08/month to run. With 1 free GB and $0.09/GB-month, S3 would be able t

Pedantic analysis: At 5 Watts and $0.30 per kilowatt-hour, a Raspberry Pi would cost $1.08/month to run. With 1 free GB and $0.09/GB-month, S3 would be able to deliver 13 GB/month at a cost of $1.08/month. So, RasPi at home gives you "unlimited" egress and a fixed cost, but you have increased latency, a rather small outgoing bandwidth (most likely), and all the downsides of running your own server. S3 gives you unlimited bandwidth, low latency, and no server maintenance, but it's only competitive on price if you don't exceed 12GB of egress. Overall I prefer S3, even if I think their egress prices are ridiculous. RasPi at home has some geeky cool factor, though... NOTE: $0.30/kwh is basically what I pay (California) for any additional usage. These equations will favor home hosting if your electricity is cheaper.