Today, there are various free and open source Bulk SMS software – of which businesses can take advantage of.
Ability to send text messages in any language.
SMS spoofing support for most carries and countries.
Ability to send unlimited message size.
SMS sending scheduler just in case you need to send your messages at a particular time of the day.
Offers much-needed text message delivery reports.
You can send a text message in both GSM alphabet and Unicode alphabet.
Delivers SMS within a minute although it can sometimes take longer.
Supports interfacing with other applications via its API.