Selecting an SMS gateway. Which is more profitable?

Question

API

Tell me, please, what is the most profitable (well, as well as high-quality working) service of the SMS gateway.
Currently using mainsms. But we are looking for more profitable prices (the volume is about 5000 SMS messages per month).
The prerequisite is the presence of an API.

Answer 1

smsc.ru look
True, I'm not sure that it is the most profitable

Answer 2

See smspilot, depending on where it can be profitable to send. On the technical side, there are no complaints either.

Answer 3

sms-uslugi.ru also look. A few years ago, at the first payment for any amount, the cost per SMS was set at 22 kopecks. Accordingly, the larger the first payment, the longer they will last you. It played into my hands.
I'm not sure at the current moment whether they have this bonus ...
It is likely that the above services may be their dealers.
Integrates easily.

Answer 4

tried a bunch of different ones .. almost all periodically fall .. there are SMS delays for half a day ... the only normal service ended up being smsc.ru ... in general, look for gateways with a high SLA level

Answer 5

The most profitable one is yours) Install a server on Linux, include a 3G modem with your SIM card and the cheapest tariff plan for SMS messages. Next, either write customer numbers through a web form, or an xls file containing all the numbers, merge them into the system - it makes a mailing list.
Thus, we generally left all third-party gateways.
The only restrictions are: the mobile number of the original message will always be displayed and there is a limit of 60 characters in Cyrillic (140 characters in Latin).
A nice bonus of such a solution is that you can receive response SMS from customers by e-mail)