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Inconsistent SMS delivery with Twilio causing user frustration

Severity: SevereOpportunity: 4/5CommunicationSaaS

The Problem

Developers using Twilio for SMS delivery are facing issues where messages are marked as 'delivered' in logs but are not received by users. This inconsistency is causing confusion and frustration, especially when there have been no code changes. Additionally, rising costs and delays during peak hours are prompting developers to consider alternative channels like WhatsApp for user verification.

Market Context

This pain point aligns with the growing trend of businesses seeking reliable communication channels as they scale. With the rise of multi-channel communication strategies, developers are increasingly looking for alternatives to SMS due to delivery issues and cost concerns, making this a timely problem to address.

Sources (2)

Reddit / r/twilio4 points
Twilio SMS marked as “delivered” but never received on phone (worked minutes before, no code change)

SMS are marked as 'DELIVERED' in Twilio logs but the messages never reach the phone.

by maryvahLaM

Reddit / r/SaaS3 points
Anyone here using WhatsApp OTP instead of SMS for user verification?

We’ve seen rising costs in some regions and delivery delays during peak hours.

by Much_Teaching_4368

Keywords

TwilioSMS deliveryuser verificationWhatsApp OTPcommunication issues

Similar Pain Points

Market Opportunity

Estimated SAM

$2.1M-$15.3M/yr

Growing
SegmentUsers$/moAnnual
SaaS companies using SMS for user verification10K-30K$10-$30$1.2M-$10.8M
Freelance developers using Twilio5K-15K$15-$25$900K-$4.5M

Based on the estimated number of SaaS companies and freelance developers using SMS for verification, applying a conservative penetration rate of 10-20% who experience delivery issues.

Comparable Products

Twilio($1B+)MessageBird($100M+)Vonage($300M+)

What You Could Build

SMS Checker

Side Project

A tool to verify SMS delivery status and troubleshoot issues.

Why Now

With increasing reliance on SMS for user verification, ensuring reliable delivery is critical for user experience.

How It's Different

Unlike Twilio's built-in tools, this would focus specifically on diagnosing delivery issues and providing insights.

Node.jsTwilio APIReact

WhatsApp OTP Manager

Full-Time Build

A platform to manage OTP delivery via WhatsApp as a primary or fallback option.

Why Now

As businesses seek alternatives to SMS, a dedicated tool for WhatsApp OTP can streamline user verification.

How It's Different

This would offer a focused solution for OTP delivery via WhatsApp, unlike general messaging platforms.

Node.jsWhatsApp Business APIFirebase

Delivery Insights Dashboard

Side Project

A dashboard providing insights into SMS delivery performance and costs.

Why Now

With rising costs and delivery issues, businesses need to monitor their SMS effectiveness closely.

How It's Different

This tool would aggregate data from multiple SMS providers, unlike Twilio's single-provider focus.

PythonDjangoChart.js