It is SMS sent using a numeric sender ID instead of a brand name.
Yes, non masking SMS is usually lower cost.
Yes, it is ideal for OTP and transactional messages.
Yes, API integration is available.
Notice issued by BTRC Dated 03 January 2019 sharok: 14.32.0000.600.36.001.19.51, as per the guidelines of BTRC all promotional SMS should be in Bangla. If you circulate the promotional SMS in English, we will be bound to disconnect your connection as per the guideline of BTRC.