I bought this as I currently use ClickSend. I've spent so far about $140 on ClickSend and was looking for an alternative. I would have gotten ShortySMS, but for the change they made to their plan obtaining a Twilio number.

That said, ShortySMS provided what I wanted:
1. LTD to a number (not necessary, but good);
2. LTD for a set amount of texts per month (necessary); and
3. Automation for scheduled texts messages (necessary).

I am a small business owner and need something that can send reminder texts for clients to pay. At most I have about 15 paying clients, which changes as soon as those clients pay. Although I have to manually input the scheduling for the automated messages, it works so I don't have to manually input every month. I can manually input the automated messages for a year and then I'm done.

Additionally, I know Clicksend has an API, but since my list for text reminders is limited to only the clients who need to pay, I have to also manually input them onto ClickSend. This is no different from SlyText.

For that reason, I will likely keep SlyText. I can also input numbers via a spreadsheet if I want to create a mass message for clients to watch my Youtube videos or read my recent blog. If SlyText or ShortySMS could integrate with SendFox, that'd be a game changer.