Why SMS still matters in an app-first world
Blog post from Sent
SMS remains important for business messaging because it can reach nearly any working phone number without requiring an app, account, internet-based ecosystem, or prior customer engagement, making it well suited to urgent, high-consequence communications such as verification codes, fraud alerts, appointment reminders, delivery updates, and account notifications. Its ubiquity, familiarity, timeliness, and store-and-forward delivery provide broad reach, particularly when richer channels are unavailable or an app is inaccessible. However, SMS has significant constraints, including limited branding and sender verification, message-length costs, basic delivery reporting, regulatory registration requirements, and security risks such as spoofing and SIM-related attacks, so it should not be treated as inherently secure. RCS and app-based messaging offer branded identities, media, interactive actions, and richer customer experiences, but depend on device, carrier, and app availability; consequently, businesses increasingly use these channels for engagement while retaining SMS as an automatic fallback. A layered messaging strategy should select channels based on the urgency, complexity, and consequences of a missed message, with SMS serving as the dependable baseline for communications where reliable reach matters more than presentation.
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