Messages that reach parents on the number the school already holds — no app to install, no assumption that every family has a smartphone. SMS through DLT-registered templates, WhatsApp once your business number is connected.
DLT, because otherwise it is filtered
In India a transactional SMS has to be sent against a template registered on the DLT platform, or the operator drops it. Templates are registered and sent against, which is the difference between a message delivered and a message that silently disappears.
Sent under our sender ID
Messages go through one Indian SMS operator, under a registered sender ID and DLT templates we keep. The school does not need its own gateway account or its own DLT registration.
WhatsApp on the school's own number
WhatsApp connects through the official Business API against a number the school owns, with approved templates. Parents reply to a number they recognise rather than an anonymous short code.