SMSGatewayCenter
7.6#3 in sms gateway softwareFrom ₹999 a monthAndroidiOSWebAPI
VisitSMSGatewayCenter is aimed at businesses that need messaging across SMS and other listed channels, with API access or integrations. Its transactional SMS plans are India-only, and DLT pre-approval applies to sender IDs and templates in India.
You want what its maker publishes above — check its page for the details.