# SMS Gateway Comparisons | VeloBotix

> Compare SMS gateway vs API, transactional vs bulk SMS, and OTP SMS vs email OTP for Sri Lankan businesses and developers.

Source: https://www.velobotix.app/resources/comparisons

# SMS comparisons

Objective criteria for choosing SMS infrastructure — not competitor fabrications.

-   [## SMS gateway vs SMS API
    
    When you need the infrastructure pipe vs HTTP access for software.](https://www.velobotix.app/resources/comparisons/sms-gateway-vs-sms-api)
-   [## Transactional SMS vs bulk SMS
    
    Event-driven alerts vs one-to-many campaigns on the same gateway.](https://www.velobotix.app/resources/comparisons/transactional-vs-bulk-sms)
-   [## OTP SMS vs email OTP
    
    When SMS verification is the better channel for Sri Lankan users.](https://www.velobotix.app/resources/comparisons/otp-sms-vs-email-otp)
-   [## How to choose an SMS gateway in Sri Lanka
    
    Criteria: local networks, pricing, API, Sender ID, docs and support.](https://www.velobotix.app/sms-gateway-sri-lanka)
-   [## SMS pricing Sri Lanka
    
    LKR packs, credits that never expire, free trial credit.](https://www.velobotix.app/sms-pricing-sri-lanka)
-   [## GSM-7 vs Unicode (Sinhala & Tamil)
    
    How encoding changes credit cost for English vs Sinhala/Tamil.](https://www.velobotix.app/resources/guides/gsm7-vs-unicode-sms)