Transcational messages are the informative messages that is needed for the clients and not any promotion or marketing messages. Transactional SMS Gateway has the additional features like Identity on who is Sending (Six Character SENDER ID), 24x7 Delivery. it can also deliver on DND & Non-DND Numbers both.
TBI Technologies offers Transactional SMS services with API which you can integrate with your software and website for sending information about purchase confirmations, OTP scenarios, student progress reports to parents. Transactional sms services is mainly used for directly transaction between business to customer.