Innovalogic | App & Web Development & IT Consultancy in Kolkata, India

Blog Details

By Sanjay Dey
14 Apr, 2025
IT Consultancy

🔐 How to Send OTP SMS Without DLT Using Otpless.com – A Complete Guide by Innovalogic

Since DLT (Distributed Ledger Technology) became mandatory in India for sending SMS, many businesses have faced delays, rejections, and higher costs in setting up OTP and transactional messaging. But what if you could send OTP without DLT registration, legally and instantly?

Since DLT (Distributed Ledger Technology) became mandatory in India for sending SMS, many businesses have faced delays, rejections, and higher costs in setting up OTP and transactional messaging. But what if you could send OTP without DLT registration, legally and instantly?

Meet Otpless.com — a next-gen platform that allows businesses to send OTPs without SMS using WhatsApp, Google, Email, and more.

At Innovalogic, we’ve successfully integrated Otpless for our clients' apps and platforms — helping them save cost, time, and compliance headaches.

Let’s dive in.

✅ What is Otpless?

Otpless.com is a secure One Tap Login & OTP service that replaces traditional SMS OTPs with WhatsApp OTP, Google OAuth, Email, Phone Call OTP, and even Social Login.

It eliminates the need for:

DLT registration
Template approvals
Sender ID hassles

💡 Why Use Otpless Instead of SMS OTP?

Traditional SMS OTPOtpless OTPRequires DLT registrationNo DLT neededTakes 2–7 days to approveInstant onboardingHigh failure rate98%+ delivery via WhatsAppCostly on scaleWhatsApp OTP is cheaper & reliableNo brandingYour logo & name shown in WhatsApp OTP

🌟 Key Features of Otpless

🔹 1. WhatsApp OTP (Primary Feature)

Send OTP directly to users on WhatsApp
Branding + verified sender + higher trust
Real-time delivery, click-to-login

🔹 2. Google/Email Login

One-tap login with Gmail or verified email

🔹 3. SMS & Call OTP (Optional Add-on)

If WhatsApp is not available, fallback to SMS/Call

🔹 4. Multi-platform SDKs

iOS, Android, Unity, React Native, Web, PHP, etc.

🔹 5. Login Widget & API

Ready-to-use login UI or full API access

🔹 6. Dashboard & Logs

OTP success, fail, conversion metrics

💰 Otpless Pricing & Plans (As of April 2025)

PlanFeaturesPriceFreeWhatsApp login + 500 OTPs/month₹0Starter5,000 OTPs, branded WhatsApp, basic support₹999/monthGrowth20,000 OTPs, fallback to SMS/Email, analytics₹3,999/monthEnterpriseCustom use cases, unlimited OTP, SLA supportCustom Pricing

🔐 WhatsApp OTP is included in all plans, including free.
📲 SMS fallback requires a paid plan.

⚙️ How to Integrate Otpless API

💻 Step-by-Step for PHP (Backend)

php

CopyEdit

<?php // Send OTP using Otpless API (WhatsApp Login) $phone = "+91XXXXXXXXXX"; // user number $url = "https://api.otpless.com/send-otp"; // Hypothetical endpoint

$data = [ "phone" => $phone, "via" => "whatsapp" // or "sms", "email" ];

$options = [ 'http' => [ 'header' => "Content-type: application/json\r\nAuthorization: Bearer YOUR_API_KEY", 'method' => 'POST', 'content' => json_encode($data), ], ];

$context = stream_context_create($options); $result = file_get_contents($url, false, $context); echo $result; ?>

🎮 How to Use Otpless in Unity C#

csharp

CopyEdit

using UnityEngine; using UnityEngine.Networking; using System.Collections;

public class OTPManager : MonoBehaviour { public string phone = "+91XXXXXXXXXX"; public string apiKey = "YOUR_API_KEY";

public void SendOtp() { StartCoroutine(SendOtpCoroutine()); }

IEnumerator SendOtpCoroutine() { string url = "https://api.otpless.com/send-otp"; string jsonData = JsonUtility.ToJson(new { phone = phone, via = "whatsapp" });

UnityWebRequest request = new UnityWebRequest(url, "POST"); byte[] bodyRaw = System.Text.Encoding.UTF8.GetBytes(jsonData); request.uploadHandler = new UploadHandlerRaw(bodyRaw); request.downloadHandler = new DownloadHandlerBuffer(); request.SetRequestHeader("Content-Type", "application/json"); request.SetRequestHeader("Authorization", "Bearer " + apiKey);

yield return request.SendWebRequest();

if (request.result == UnityWebRequest.Result.Success) { Debug.Log("OTP sent: " + request.downloadHandler.text); } else { Debug.LogError("OTP send failed: " + request.error); } } }

✅ Customize endpoints based on Otpless’ official API documentation.

💼 How Innovalogic Uses Otpless for Clients

At Innovalogic, we build real-money apps, games, delivery platforms, booking systems, and more. Many of our clients face issues with DLT when launching fast.

So we integrate Otpless to provide:

🔐 Instant WhatsApp OTP login
⚡ Faster onboarding for users
💸 Low cost + No compliance delay
🧠 Smarter fallback to SMS if needed

Whether you're launching a Unity-based rummy game, a kart racing app, or a salon booking app, we handle secure login with Otpless—ready to scale.

🚀 Final Thoughts

If you want OTP verification without the headache of DLT, Otpless.com is your best option. With instant onboarding, WhatsApp trust, and a powerful API, it's the modern way to handle authentication.

💡 Want Otpless integrated into your app, website, or game?
👉 Let Innovalogic take care of it. From PHP to Unity, we deliver secure, fast login experiences your users will love.

Search

Resent Post

28 Jul, 2026
Google Ads Gambling Policy 2026: A Guide for Devs & Marketers
27 Jul, 2026
Navigating International Gaming Regulations: A Strategic Guide for Developers
26 Jul, 2026
A Developer's Guide to the 2026 US Crackdown on Social and Sweepstakes Casinos

Tags

Google Ads Digital Marketing Gaming Policy Real-Money Gaming Advertising Compliance Gaming Development Regulatory Compliance iGaming GameTech International Law Social Casino Sweepstakes Casino Gaming Law Compliance Game Development game monetization machine learning AI in gaming real-money gaming player lifetime value gaming development Google Mobile Ads Next-Gen SDK Android Development App Monetization Kotlin Mobile Advertising App Development Google Play Policy App Compliance Mobile App Development Android Vitals Stripe Payment Gateway Monetization Stripe Connect Game Payments Google Play Mobile App Monetization App Distribution Epic Games Lawsuit Swift 6 iOS Development Concurrency Data Race Safety Swift Migration responsible gaming player protection gaming compliance gambling technology Mobile Games GameDev In-App Purchases AI in Gaming RMG India Gaming Mobile Gaming Chargeback Policy Review Refund API AI in software development SDLC Artificial Intelligence Future of Coding Developer Tools IT Consultancy AI-powered testing Google Update SEO Spam Update Search Engine Optimization Project IDX AI in Development Cloud IDE Firebase Flutter Full-Stack Development Native Development Cross-Platform Tech Stack 2026 Google Consent Mode v2 Data Privacy GDPR Marketing Analytics third-party cookie update digital marketing first-party data marketing strategy Google Chrome data privacy Policy Updates AI in Marketing Digital Marketing Trends Marketing Automation Predictive Analytics MarTech Game Compliance Regulatory Landscape Legal Tech Real Money Gaming Skill-Based Games eSports Game Monetization iOS 18 SDK Apple Mobile Development Xcode 16 App Store social casino game compliance mobile gaming monetization visionOS 2 Apple Vision Pro Spatial Computing SwiftUI mobile app development app trends 2026 flutter augmented reality AI in apps 5G cross-platform development Apple Intelligence App Intents Siri AI Apps Generative AI UI/UX Design User Experience Design Trends Ambient AI Personalization Payment Processing Fintech Online Gaming sweepstakes casino online gaming igaming casino software Player Engagement Google AI Overviews Content Strategy Structured Data zero-click searches AI Overviews Generative Engine Optimization Google Android 15 Business Technology App Security poastman image converter website to android app free tools AI Tools unity free assests unity egf unity tutorial elvish yadav systum unity game ben 10 free unity assests photon rng tseting fantasy how to make fantasy app like dream11 fantasy cricket fantasy cricket sports fantasy cricket app best payment gateway in india accept payments online payment gateway best payment gateways in india payment gateway for ludo game payment gateway for rummy game payment gateway for gaming apps how to send bulk sms without dlt registration send otp without dlt how to send otp without dlt how to send otp without dlt otp how to integrate otp in website transactional sms transactional bulk sms transactional sms india transactional sms gateway india transactional sms service dlt registration in india figma tutorial for beginners figma design figma tutorial ui design figma ux design design design for figma web design ui/ux design facebook ads how to run facebook ads facebook advertising facebook marketing how to make a racing game in unity racing unity 3d unity tutorials gaming games racing game racing games unity games unity game engine unity multiplayer tutorial networking unity3d game development unity game development indian gamer making indie games unreal engine RNG online money games in india how to earn money online online betting laws in india online gaming license india make money online is betting legal in india india earning money unity source codes unity source code multiplayer multiplayergames dream11 ludo snake & ladder real money

+91 8910642626

Cookies Consent