Mission-Critical Transactional SMS & Instant OTP Gateway
Deliver mission-critical one-time passwords (OTPs), banking alerts, fee receipts, and real-time order updates in under 3 seconds. Guaranteed delivery to both DND & Non-DND numbers with 6-character verified alphabetic headers.
Direct Tier-1 carrier pipes
Multi-server telecom redundancy
Delivers on DND & Non-DND 365 days
Trusted by banks, schools & fintechs
Engineered for Sub-Second Speed & Zero Failure
Unlike standard bulk messaging routes, our transactional engine guarantees priority transmission with sub-second delivery for time-sensitive OTPs and enterprise alerts.
Lightning OTP Delivery
Priority telecom pipes deliver 2FA and OTP codes in under 3 seconds, eliminating user abandonment during sign-ups, password resets, and payment checkouts.
- Sub-second queue dispatch
- Real-time DLR callbacks
Bypasses DND Registry
TRAI telecom regulations allow verified transactional alerts, receipts, and order statuses to deliver 100% legally to DND-registered mobile numbers 24x7.
- Verified DND bypass
- 24x7 continuous delivery
6-Char Alpha Header
Transmit with your registered 6-letter corporate sender ID (e.g. INTECH, INTKNO) to establish immediate brand trust and eliminate recipient phishing concerns.
- Free Header registration
- DLT operator whitelisting
Multi-Carrier Failover
Intelligent telecom routing monitors operator link health and instantly reroutes traffic across Airtel, Jio, VI, and BSNL to prevent delays.
- Multi-operator redundancy
- 99.99% high-availability SLA
Transactional SMS Pricing Plans
Simple volume packages with lifetime validity and zero hidden fees. Guaranteed 24x7 DND delivery with free DLT onboarding support.
- 25,000 Transactional SMS
- Unique 6-Char Sender ID
- 24x7x365 Instant Delivery
- Delivers on DND & Non-DND
- REST API & Webhooks
- Lifetime Validity
- Standard Support
- 50,000 Transactional SMS
- Unique 6-Char Sender ID
- 24x7x365 Instant Delivery
- Delivers on DND & Non-DND
- High-Speed REST API & DLR
- Lifetime Validity
- Priority Email & Phone Support
- 1,00,000 Transactional SMS
- Unique 6-Char Sender ID
- Sub-Second OTP Latency
- High-Priority Direct Telecom Route
- REST API & Live Webhook DLR
- Dedicated Account Manager
- Lifetime Validity
- 5,00,000 Transactional SMS
- Multiple Verified Sender IDs
- Dedicated SMPP v3.4 Server
- Multi-Carrier Auto-Failover
- Express DLT Template Whitelisting
- Dedicated 24x7 Tech Support SLA
- Custom Telecom Routing Rules
Integrate in Under 5 Minutes
Simple, robust REST API endpoints and SMPP pipes. Easily trigger instant OTPs, order updates, and critical system alerts from PHP, Node.js, Python, Java, or Laravel.
# Send Transactional SMS / OTP Endpoint
curl -X POST https://api.intechnosoftware.com/v2/sms/send \
-H "Authorization: Bearer sec_live_9950348952" \
-H "Content-Type: application/json" \
-d '{
"sender_id": "INTKNO",
"route": "transactional",
"dlt_template_id": "1207161234567890",
"mobile": "919950348952",
"message": "Dear User, your OTP is 489521. Valid for 10 mins. - INTECHNO"
}'
// HTTP/2 200 OK (Latency: 0.18s)
{
"status": "success",
"message_id": "tx_998472948293",
"status_code": 200,
"delivery_latency_sec": 0.82,
"credits_deducted": 1
}Transactional SMS Use Cases
Critical notifications delivered reliably across banks, healthcare providers, school ERPs, and e-commerce portals.
Banking & Fintech
Instant debit/credit alerts, loan EMI reminders, withdrawal receipts, and high-security 2FA authentication OTPs.
2FA & Secure OTPs
Sub-3 second verification codes for mobile login, forgot password resets, payment authentication, and account access.
E-Commerce & Logistics
Order confirmation notices, real-time courier tracking numbers, out-for-delivery alerts, and cash-on-delivery OTP verification.
School & University ERP
Automated student attendance alerts to parents, school fee receipt confirmations, exam schedules, and holiday announcements.
Healthcare & Hospitals
Doctor appointment confirmations, pathology lab test report ready links, prescription reminders, and emergency patient alerts.
Travel & Ticketing
Flight/train PNR confirmations, bus boarding point alerts, hotel reservation receipts, and driver cab arrival notifications.
TRAI DLT Verified Routing with Free Onboarding Support
In accordance with TRAI regulations, transactional messages require pre-approved DLT templates with dynamic variables like {#var#}. Our compliance team provides complete hands-on assistance to get your templates approved within 24 hours.
- Registration assistance on Jio, Airtel, VI, and BSNL DLT portals
- Fast 6-character Alpha Header (Sender ID) verification
- Dynamic template formatting with correct variable brackets
{#var#} - Priority whitelisting for 24x7 transmission to DND numbers
Transactional SMS FAQs
Everything you need to know about transactional routes, DND compliance, and API integration.
INTKNO or INTECH). Unlike numeric phone numbers, alphabetic headers establish verified company authority and eliminate phishing concerns.
{#var#}. You can pass dynamic values for customer name, order number, amount, date, and OTP codes via our REST API or through spreadsheet uploads.
Start Sending 24x7 Transactional SMS & OTPs Today
Get instant API credentials, direct telecom connectivity, and white-glove DLT template approval support with Intechno Software.