Hashtech specializes in SMS and Call Gateway integrations like Twilio, Nexmo and others. It can be used for several things :
OTP One time passwords for logging into website, selfservice systems or for any specific transactions
Transaction Alerts Transaction Alerts at completion of transaction. For example, on your e-commerce site, you can send alerts on completion of transaction and/or if any user leaves transaction incomplete then you can send him/her offers on a particular product and discount offers via SMS/text message
2way verification system You can have user confirm specific transaction on SMS by sending an SMS to specific number or response to SMS by replying to the text message.Call Based Verification Auto Calling to user on his/her number for verification and taking specific input from user.
Call Based Routing Auto routing of user on call basis. For example, user can call up specific number and enter code on homepage and he gets redirected to specific page on web creating a relation between call and web. Reordering of products can be done call based. Also Call/SMS based one click call on ordering anything from wishlist/shortlisted items.