RatSMS is a No. 1 Bulk SMS service provider in India. RatSMS offers Promotional SMS, Transactional SMS, OTP SMS, Service Implicit, Service Explicit, Smart SMS, WhatsApp Business API and more. It offers all the facility to business to connect with its customer through various. RatSMS helps you to send bulk sms to customers, employees, and partners in short time. Get most accurate sms delivery rate by sending sms via RatSMS.