17 Aug 2026 · 6 min read

What is an SMS gateway?

An SMS gateway is software that accepts a message from your system and delivers it to a mobile network. Without a gateway, your website cannot speak Dialog or Mobitel’s protocols.

Gateway, API and bulk SMS

The gateway is the pipe. The SMS API is how developers push traffic into that pipe. Bulk SMS is a campaign use case on the same pipe. OTP SMS is a security use case that needs local routes and low latency.

Why Sri Lanka-specific routing matters

Grey international routes look cheap until OTP codes arrive late or not at all. VeloBotix is positioned as a Sri Lankan SMS gateway and API platform: local operators, Sender ID, LKR billing.

Next: SMS gateway product page