Products

CHANNELS

SMS

Send text messages worldwide via API or web platform.

Viber

Deliver rich, branded messages with media through API or intuitive web tools, with failover support.

AUTHENTICATION

HLR & MNP Lookup

Real-time network and number checks for precise delivery.

Verify API

Enable multi-factor authentication on any channel, with fallback options.
Features
Features

Shortlink Tracking

Shortcodes

Team Management

Optout/Optin
Pricing
Resources
Bulk SMS

SMS Marketing

SMS Gateway

SMS Affiliate Program

Blog

SDKs

FAQ

Unicode SMS Checker
Contact Sales

Log In

SMS.to Blog

Two-Way SMS: Surveys, Polls, Autoresponders and Chatbots

How customers reply to your texts and how replies reach your app, with a webhook

Best SMS Marketing Providers in 2026: 10 Platforms Compared

Ten SMS marketing platforms compared on pricing model, published list prices, country coverage and automation,

7 Best OTP API Providers (2026): Pricing, Channels and Fraud Tools Compared

SMS.to, Twilio Verify, Vonage Verify, Sinch, Infobip, Plivo and Telnyx compared on published channels, pricing

Top 7 SMS API Providers (2026): Full Comparison Guide

SMS.to, Twilio, Sinch, Infobip, Plivo, Vonage and Telnyx compared on published list prices, channels, verification

How to Integrate an SMS API: 6 Steps From Sign-Up to Go-Live

An end-to-end SMS API integration walkthrough: create a key, set your sender ID, send a

SMS.to Announces Integration with Optimove to Power Triggered and Scheduled Messaging at Scale

Optimove users can now send triggered and scheduled SMS campaigns through SMS.to, configured as an