SMS is the most opened, most responded, most ubiquitous, and most powerful messaging platform
Twilio has set themselves above the rest in programmable SMS, along with other services.
However, many of us just need a quick, down and dirty bulk SMS tool to broadcast a message.
Or, perhaps we just want something a tad more managed and polished than a roll your own (do some coding) service.
Here are a few SMS service providers.