Ravindra
The cheapest SMS API services in India as of May 2026 generally start around ₹0.10 to ₹0.15 per SMS for high-volume transactions, with providers like MessageBot, Fast2SMS, and 2Factor offering competitive pricing. These providers are DLT-compliant, which is mandatory in India, ensuring reliable delivery for OTPs, transactional messages, and bulk SMS. [1, 2, 3, 4]