SMS API vs SMPP: Which Should You Use?

Both send A2P SMS to the same networks on the same routes. The difference is how you connect and how much sustained throughput you need.

The REST SMS API

An HTTPS endpoint you POST to. Easiest to integrate (any language, minutes to first message), stateless, ideal for transactional and most applications. Delivery reports arrive via webhooks.

SMPP

A persistent binary connection (a bind). Higher sustained throughput and lower per-message overhead - preferred by aggregators, banks and very high-volume senders. Requires a persistent client and IP allow-listing.

How to choose

Start with the REST API - it covers the vast majority of use cases. Add SMPP when you need guaranteed, sustained TPS at scale. With eSMS Africa both reach the same direct routes, so you can start on the API and add a bind later.

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