ATT offers an "unlimited" plan on their website right now with 100gb of "premium" (read unthrottled) data for $85/mo (goes down to $50 if you want 4 lines).
Twillio is charging >10x the rate per-byte. ($1e-8 / byte compared to the $1e-9 that ATT charges).
I don't know about you, but I use more than 1/10th of my data plan every month.
If you go to AT&T and say "I want 10,000 SIMs that'll let me use a few kilobytes of data a day, with enterprise management features", they either won't sell them to you or will sell them at prices comparable to Twilio (except they won't work when out of range of an AT&T tower, and certainly won't work overseas). Their minimum pay-as-you-go plan that includes any data at all seems to be about $30/mo - if you're using maybe 10 kilobytes a day, that's not feasible.
It’s showing $1.50/MB and $22/GB and it’s a network configuration that is AT&T except in areas that don’t have service it’ll allow regional carriers and TMo.
Hologram SIMs are price competitive here and allow devices to connect to the best network available without unfavorable network preference schemes.
You're only thinking about the data fees. There's much more to an IoT offering that is priced into that cost. There's plenty of enterprise features, for example. Bulk management of SIMs is a huge one: setting data limits per-SIM or per-fleet, activating/deactivating them for seasonal devices or new distributions. Also consider SLAs for your very important data, or dedicated support from the carrier. You don't need any of these things when you are managing one phone, or even a family of phones, but they are essential for fleets of 100's or 1000's of devices.
Also, keep in mind that is data being sold to you for use only on their network. Roaming fees will be exorbitant if you need to go outside their network, which may be needed to reach rural areas, or when you have an asset tracker traveling between states or territories. Keep in mint that "normal priced data package" has very predictable usage — your phone is almost always online, meaning the backend infrastructure costs are low since it's not constantly going offline/online. The tower going out and verifying an IoT device should be on the network (especially if going through a roaming partner) is surprisingly expensive.
Twillio is charging >10x the rate per-byte. ($1e-8 / byte compared to the $1e-9 that ATT charges).
I don't know about you, but I use more than 1/10th of my data plan every month.