
Otp sending services
Need help in figuring out right service for sending otps to users

Gupshup

Try Smartping or Plivo. Also could potentially fallback to WhatsApp if the SMS is not delivered after say like 30 seconds

Have you tried Kalerya by any chance? Just curious on how do they perform compared to Sns

Not sure about Kalerya. I have used the above 2 and SNS. SNS was a bit expensive so we switched to Smartping for Indian numbers and Plivo for international

Does any of these service provider proactively share best practices and counter-abuse mechanism to avoid hefty bills/wallet drain?
Our team had to do a lot of figuring out by ourself, AFTER our service were abused in multiple different ways.

Nah Kalerya guys behave like goon 😂

Go with Gupshup, when things go bad they would be the ones most likely available

Tanla

msg91

Do you have the DLT registration etc done?

Try AuthKey, found their services to be the cheapest.

Responsys

Firebase works fine, gupshup for marketing comms or txn comms