Question 1

How many SMS API apps are there?

Accepted Answer

We track 2 in SMS API on AppWatch, incumbents and new arrivals in the same list. That is what we have found and matched, not a count of everything that exists.

Question 2

What are the most popular SMS APIs?

Accepted Answer

The SMS APIs on AppWatch with the most outside evidence of use are Twilio (written about 36 times). That is evidence that people have met each app, from ratings, search traffic, articles and launch votes, not a ranking of which is best.

Question 3

Which established products are in the SMS API market?

Accepted Answer

AppWatch follows one established product here, Twilio, alongside the newer apps.

Question 4

How does AppWatch track SMS APIs?

Accepted Answer

AppWatch finds apps where they launch, on product directories and app stores, and places each one in the markets its own description fits. It keeps checking whether each app is still online. The counts on this page are what we have found, not every app that exists.

Question 5

How often is this page updated?

Accepted Answer

It changes as AppWatch places apps in this market. The most recent was placed on 17 September 2026.

App	Built on	Domain since	Pricing	Added
Twilio Communication APIs for SMS, Voice, Video & Authentication	Not measured	2007	Pricing + enterprise	4 Sept 2026
Sendly Sendly is the first AI native SMS platform that allows both agents and developers to send SMS from their applications in less than 5 minutes.	Not measured	2025	Not measured	15 Jan 2026

SMS APIs

SMS APIs market overview

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SMS API FAQ