OTP Service Providers India 2026: The Complete Guide to Fast, Secure & TRAI-Compliant OTP Delivery

Your user just entered their phone number. They clicked "Send OTP." Now they are waiting.

Five seconds pass. Then ten. The OTP has not arrived.

They tap "Resend." It still does not come. They abandon the process entirely.

That single failure — invisible to you, devastating to your conversion — happens millions of times every day across India because businesses chose the wrong OTP service provider. In fintech, a dropped OTP means a lost transaction. In e-commerce, it means an abandoned cart. In healthcare, it can mean a delayed consultation booking.

This guide covers everything you need to choose the right OTP service provider for your Indian business in 2026: what OTP delivery actually requires under India's network conditions, how DLT compliance works for OTP specifically, what separates a Tier-1 route from an aggregator route, how to evaluate providers on metrics that matter, and why TechTo Networks consistently delivers OTP codes in under three seconds across all four major Indian telecom operators.

OTP

What Is an OTP Service? (Beyond the Basics)

A One-Time Password (OTP) is a 4–6 digit numeric or alphanumeric code generated for a single authentication event and valid for a fixed window — typically between 30 seconds and 10 minutes depending on the use case.

But calling OTP simply a "code sent by SMS" misses what is really happening under the surface.

Every OTP transaction in India passes through five layers before it reaches your user's mobile:

1. Your application or platform generates the OTP code using a TOTP (Time-based One-Time Password) or HOTP (HMAC-based One-Time Password) algorithm, or delegates generation to your OTP provider's API.

2. Your OTP service provider receives the send request via API, validates your DLT entity ID and template ID, formats the message per TRAI requirements, and routes it to the correct telecom operator.

3. The TRAI DLT registry is checked in real time. If your sender ID or template is not registered, the message is blocked at the operator level — before it ever reaches the subscriber.

4. The telecom operator (Jio, Airtel, Vi, or BSNL) receives the message from the provider's route, performs a final NCPR check, and pushes the SMS to its network tower.

5. The mobile device receives the code. Most Android devices auto-read OTP codes via the SMS Retriever API, eliminating the need for manual entry.

The speed and reliability of steps 2 through 4 is entirely determined by which OTP service provider you choose and which route they use. That is the difference between three seconds and thirty seconds — and between a completed login and an abandoned session.

TOTP vs HOTP vs SMS OTP: Which Does Your Business Need?

Most Indian businesses default to SMS OTP without evaluating whether it is the right authentication method for their specific use case. Here is a clear breakdown.

Method	How It Works	Validity	Best For	Limitations
SMS OTP	4–6 digit code sent via SMS	5–10 minutes typically	Login, transaction verification, user onboarding	Dependent on telecom network; SIM swap vulnerability
TOTP (Time-based)	Code generated by authenticator app every 30 seconds	30–60 seconds	Developer logins, high-security admin access	Requires app installation by user
HOTP (Counter-based)	Code generated per authentication event	Until used	Hardware tokens, offline verification	Synchronisation risk if counter drifts
Voice OTP	Code read aloud via automated voice call	Call duration	Feature phone users, accessibility needs, SMS fallback	Higher cost per delivery
WhatsApp OTP	Code sent via WhatsApp message	10 minutes	Businesses with high WhatsApp user base	Requires WhatsApp Business API approval
Silent Network Auth (SNA)	Authentication via network-level signal, no code displayed	Instant	Frictionless background verification	New technology, limited India rollout in 2026

For most Indian consumer-facing applications — fintech, e-commerce, ed-tech, healthcare — SMS OTP remains the primary channel due to its universality across all handset types and all 1.1 billion active mobile connections in India. Voice OTP and WhatsApp OTP function as fallback or secondary channels. TOTP is reserved for internal systems and developer-facing tools.

TechTo Networks supports SMS OTP, Voice OTP, and WhatsApp OTP from a single API, allowing you to configure automatic fallback rules: if SMS delivery fails within a defined timeout, the system triggers a Voice OTP automatically.

Why OTP Delivery Fails in India: The 6 Root Causes

Before evaluating any provider, you need to understand why OTP messages fail — because not all failures are the provider's fault, and not all providers handle them equally.

1. DLT non-compliance. Since 2021, TRAI requires every commercial SMS — including transactional OTPs — to be sent with a DLT-registered entity ID, sender ID (header), and pre-approved template. If any of these are missing or mismatched, the operator blocks the message silently. The sender receives no error; the user receives nothing. This is the single most common cause of OTP failure for new businesses in India.

2. Aggregator routing vs Tier-1 routing. Providers using Tier-1 routes connect directly to the telecom operator's SMSC (Short Message Service Centre). Providers using aggregator routes pass through one or more intermediary nodes before reaching the operator. Each intermediary adds latency and introduces a failure point. For OTP, where delivery speed is directly tied to conversion, Tier-1 routing is non-negotiable.

3. Network congestion at peak hours. India's mobile networks experience significant SMS congestion during evening hours — typically 6 PM to 9 PM — and during major events (IPL, festival sales, budget announcements). Providers without intelligent load-balancing and failover routing experience delivery delays of 30 seconds to several minutes during these windows. Premium providers use dynamic routing to shift traffic to less-congested operator paths in real time.

4. SMS pumping fraud. In 2026, SMS pumping (also called Artificially Inflated Traffic or AIT) has become India's fastest-growing OTP fraud vector. Fraudsters trigger fake OTP requests to premium-rate numbers, generating revenue from inflated message volumes. AI-powered fraud detection — analysing request frequency, IP geolocation, device fingerprinting, and number patterns — is now a standard feature of enterprise-grade OTP providers. Without it, a single fraud attack can drain your OTP credits in hours.

5. NCPR scrubbing failures. TRAI's National Customer Preference Register (NCPR) governs which subscribers have opted out of commercial communications. Transactional OTPs are exempt from NCPR restrictions, but miscategorising a transactional OTP as a promotional message triggers NCPR blocking. Providers must correctly categorise your message route or your OTP will be blocked for DND-registered numbers.

6. Template variable mismatches. TRAI's DLT system requires OTP message templates to be registered with variable placeholders marked explicitly. If your live message does not match the registered template structure — for example, the variable field has a different character count than the registered template allows — the message is rejected. This is a common pitfall for businesses that update their OTP message text without updating the DLT template.

How to Evaluate OTP Service Providers: 8 Metrics That Actually Matter

Every provider in India claims "fast delivery" and "99.9% uptime." Here is how to cut through the marketing and evaluate what matters.

1. Delivery Speed (P95, Not Average)

Average delivery speed is a misleading metric. The meaningful number is P95 delivery time — the speed at which 95% of your messages are delivered. A provider with a 2-second average but a P95 of 45 seconds will still fail a significant portion of your users.

Ask every provider for their P95 delivery time across all four Indian operators (Jio, Airtel, Vi, BSNL) during peak hours (6 PM–9 PM IST). Premium providers like TechTo Networks maintain P95 under 8 seconds across all operators during peak windows.

Industry benchmark:

• Under 3 seconds: Premium/enterprise grade

• 3–5 seconds: Standard acceptable range

• 5–10 seconds: Causes measurable drop in user completion

• Over 10 seconds: Significant conversion impact — users abandon or trigger repeated resends

2. Delivery Rate (Per Operator, Not Overall)

An overall "99% delivery rate" can mask a 92% delivery rate on Vi or BSNL being averaged with a 100% rate on Jio. Since your users are distributed across all four operators, demand per-operator delivery rates. If a provider cannot provide operator-specific breakdown, they do not have genuine visibility into their own delivery quality.

3. Tier-1 Routing Confirmation

Ask directly: "Do you use Tier-1 direct operator routes for OTP delivery in India, or do you route through aggregators?"

Tier-1 routes bypass intermediaries and connect directly to the operator SMSC. This provides faster delivery, better visibility, and cleaner compliance. Any provider unwilling to clearly confirm Tier-1 routing is likely using aggregator routes.

TechTo Networks uses direct Tier-1 routes with Jio, Airtel, Vi, and BSNL for all transactional OTP traffic.

4. DLT Compliance Automation

TRAI's DLT requirements for OTP include entity registration, sender ID (header) registration, template pre-approval, and real-time template matching on every send. Managing this manually is error-prone and time-consuming.

Look for providers that offer: automated DLT entity registration assistance, real-time template validation before transmission, template health monitoring (alerting you if a registered template is flagged or expired), and automated NCPR scrubbing.

5. Fraud Prevention (AI-Powered SMS Pumping Detection)

In 2026, any enterprise OTP provider operating in India should have active SMS pumping detection. Evaluate providers on: real-time IP-based rate limiting, device fingerprinting, anomaly detection for unusual send patterns, geographic blocking for high-risk originating IPs, and automatic campaign pause on fraud signal.

6. Fallback Mechanism

What happens when an SMS OTP fails to deliver? The best providers support automatic fallback to Voice OTP or WhatsApp OTP after a configurable timeout (for example, if SMS is undelivered after 15 seconds, trigger a voice call). This reduces abandonment without requiring additional integration work on your side.

7. API Response Time and Uptime SLA

Your OTP provider's API must respond within 200–500 milliseconds. If the API call itself takes 2–3 seconds, your total OTP delivery time starts at a disadvantage before the SMS even enters the network. Request the provider's API SLA and look for a minimum 99.9% uptime guarantee backed by a contractual SLA, not just a marketing claim.

8. Support Response Time

When OTP delivery fails in production, every minute costs conversions. Evaluate providers on: 24/7 support availability, a dedicated account manager (not a ticketing queue), average response time for P1 incidents, and past incident post-mortems to demonstrate transparency.

India's Top OTP Service Providers Compared (2026)

Provider	Best For	Tier-1 Routing	DLT Automation	Fraud Protection	Fallback (Voice/WA)	India Support
TechTo Networks	SMBs to enterprise, developer-first	✅ Yes	✅ Yes	✅ AI-powered	✅ SMS + Voice + WA	✅ 24/7
MSG91	Marketing + OTP combined	Partial	✅ Yes	Partial	✅ SMS + WA	Business hours
2Factor	Budget India OTP	✅ Yes	Manual	❌ Limited	SMS only	Email/ticket
Exotel (ExoVerify)	Enterprise India + SEA	✅ Yes	✅ Yes	Partial	SMS + Voice	Business hours
SMSCountry	Global + India OTP	✅ Yes	✅ Yes	Partial	SMS + Voice	24/7
Twilio Verify	Global enterprise	✅ Yes	Limited for India	✅ Yes	SMS + Voice + WA	24/7 (costly)
Route Mobile	Large enterprise direct routes	✅ Yes	✅ Yes	Partial	SMS + Voice	Enterprise only
Plivo	Developer API first	✅ Yes	Limited for India	Limited	SMS + Voice	Ticket-based
Mtalkz	Security-first India	✅ Yes	✅ Yes	✅ Yes	SMS	Business hours
Infobip	Omnichannel enterprise	✅ Yes	✅ Yes	✅ Yes	All channels	24/7 (expensive)

Why TechTo Networks for Indian Businesses: TechTo is built specifically for India's telecom environment. Unlike global providers (Twilio, Infobip) that treat India as one market among 180+, TechTo's infrastructure is optimised for Indian operator routing, DLT compliance automation, and India-specific fraud patterns. Unlike budget providers (2Factor), TechTo provides enterprise-grade reliability, AI fraud detection, and multi-channel fallback at SMB-friendly pricing.

DLT Registration for OTP SMS in India: Step-by-Step

This is the section every competitor skips or summarises in two lines. Here is the complete process.

TRAI's Distributed Ledger Technology (DLT) system is mandatory for every business sending OTP SMS in India. Without DLT registration, your messages will be blocked by all four telecom operators regardless of which provider you use.

Documents Required

Before starting DLT registration, prepare the following documents in digital form (PDF/JPG):

• PAN card of the business entity

• Certificate of incorporation (for companies) or GST registration certificate (for proprietorships/partnerships)

• GST registration certificate

• Authorised signatory's Aadhaar card or PAN card

• Authorised signatory's board resolution or letter of authorisation

• Company letterhead (for the authorisation letter)

Step 1: Choose Your DLT Portal

TRAI allows registration on any of the following operator portals — registration on one is valid for sending through all operators:

• Jio: trueconnect.jio.com

• Airtel: smartconnect.airtel.in

• Vodafone Idea: vilpower.in

• BSNL: www.ucc.bsnl.co.in

• Videocon: smartping.com

Most businesses register on Jio TrueConnect or Airtel Smart Connect due to their faster approval timelines.

Step 2: Entity Registration (3–7 Business Days)

Register your business as a "Principal Entity" on the DLT portal. Upload your documents, complete the KYC process, and pay the registration fee (approximately ₹5,000–₹6,000 annually depending on the operator). You will receive a unique PE (Principal Entity) ID upon approval.

TechTo Networks assists with DLT entity registration as part of onboarding — no prior experience with the portal is required.

Step 3: Header (Sender ID) Registration

After entity registration, register your sender ID (the 6-character alphanumeric code that appears as the sender on your OTP messages). For transactional OTP, your header must begin with a specific industry code. Examples:

• TECHTO — General business OTP

• FINTEC — Fintech OTP

• HLTCRE — Healthcare OTP

Header registration typically takes 24–48 hours and is approved by the telecom operator.

Step 4: OTP Template Registration (Critical)

This is the most technically important step and where most DLT failures occur.

An OTP template must be registered as a Transactional category template. The variable OTP code must be marked with a specific variable placeholder. A correctly formatted OTP template looks like this:

Your OTP for login to {#var#} is {#var#}. Valid for 10 minutes. Do not share with anyone. - TECHTO

Key rules for OTP templates on DLT:

• The OTP code must be in a {#var#} variable field

• The template must include a non-sharing instruction (TRAI requirement)

• The sender ID must be appended at the end after a hyphen

• Maximum template length is 160 characters

• Variable fields are counted as 30 characters in the character limit

• You cannot change the static text of a registered template — any change requires a new template registration

Common rejection reasons: missing sender ID suffix, missing "do not share" instruction, promotional language in a transactional template, incorrect variable formatting.

Step 5: API Configuration

Once your entity ID, header, and template ID are confirmed, provide these to TechTo Networks. They are passed as parameters in every API call to ensure real-time DLT compliance.

Approval Timeline Summary

Step	Portal	Estimated Time
Entity registration	Any DLT portal	3–7 business days
Header registration	Same portal	24–48 hours
Template registration	Same portal	24–48 hours
Total from start to first OTP send	—	5–10 business days

TechTo Networks OTP API: Integration Guide

TechTo Networks provides a REST API for OTP generation, delivery, and verification. The API supports SMS, Voice, and WhatsApp OTP from a single endpoint, with automatic fallback configuration.

Send OTP via SMS (HTTP Request)

POST /v1/otp/send HTTP/1.1
Host: api.techtonetworks.com
Content-Type: application/json
X-API-Key: YOUR_API_KEY

{
  "mobile": "919876543210",
  "sender_id": "TECHTO",
  "template_id": "1007xxxxxxxxxx",
  "dlt_entity_id": "1001xxxxxxxxxx",
  "otp_length": 6,
  "otp_expiry_seconds": 300,
  "message": "Your OTP for login to TechTo is {otp}. Valid for 5 minutes. Do not share with anyone. - TECHTO",
  "channel": "sms",
  "fallback": {
    "enabled": true,
    "channel": "voice",
    "trigger_after_seconds": 15
  }
}

API Response

{
  "status": "sent",
  "request_id": "TN-OTP-20260601-8821",
  "mobile": "919876543210",
  "channel": "sms",
  "otp_expiry": "2026-06-01T12:05:00+05:30",
  "delivery_status": "delivered",
  "delivery_time_ms": 2340,
  "fallback_triggered": false
}

Verify OTP

POST /v1/otp/verify HTTP/1.1
Host: api.techtonetworks.com
Content-Type: application/json
X-API-Key: YOUR_API_KEY

{
  "request_id": "TN-OTP-20260601-8821",
  "otp": "847291"
}

Verify Response

{
  "status": "verified",
  "request_id": "TN-OTP-20260601-8821",
  "verified_at": "2026-06-01T12:02:17+05:30",
  "attempts_used": 1
}

Supported Parameters

Parameter	Type	Description
mobile	string	Mobile number with country code (91XXXXXXXXXX)
otp_length	integer	4, 5, or 6 digits
otp_expiry_seconds	integer	60–600 seconds
channel	string	sms, voice, whatsapp
fallback.enabled	boolean	Enable automatic channel fallback
fallback.channel	string	voice or whatsapp
fallback.trigger_after_seconds	integer	Seconds to wait before triggering fallback
max_attempts	integer	Maximum OTP entry attempts (default: 3)

SDK Support

TechTo Networks provides official SDKs for Python, Node.js, PHP, Java, and .NET. Sample Python integration:

import techto_sdk

client = techto_sdk.Client(api_key="YOUR_API_KEY")

# Send OTP
response = client.otp.send(
    mobile="919876543210",
    sender_id="TECHTO",
    template_id="1007xxxxxxxxxx",
    dlt_entity_id="1001xxxxxxxxxx",
    channel="sms",
    fallback={"enabled": True, "channel": "voice", "trigger_after_seconds": 15}
)

# Verify OTP
verification = client.otp.verify(
    request_id=response["request_id"],
    otp="847291"
)

print(verification["status"])  # "verified"

Full API documentation: docs.techtonetworks.com/otp-api

OTP Pricing in India: What You Should Actually Be Paying

Pricing transparency is rare in India's OTP market. Most providers list "starting from ₹0.12" without specifying what that rate applies to, which operators it covers, or what fees are excluded.

Here is TechTo Networks' complete OTP pricing structure with no hidden items:

Channel	Rate Per OTP	Minimum Volume	DLT Charges	GST
SMS OTP (Tier-1)	₹0.18	1,000 OTPs	Included	18% extra
SMS OTP (High Volume)	₹0.14	1,00,000 OTPs/month	Included	18% extra
Voice OTP	₹0.45	500 calls	Included	18% extra
WhatsApp OTP	₹0.35	1,000 messages	Meta session fee extra	18% extra
OTP API Access	Free	All plans	—	—

What "DLT charges included" means: Many providers charge separately for DLT routing fees (₹0.01–₹0.03 per message) on top of their per-OTP rate. TechTo's pricing includes all DLT-related routing costs in the listed rate.

Volume discounts are available for OTP volumes above 5,00,000 per month. Enterprise contracts with monthly billing and dedicated routes are available for volumes above 50,00,000 OTPs per month.

OTP Use Cases by Industry in India

Fintech and Banking

OTP is the backbone of India's digital payment system. Every UPI transaction, net banking login, NEFT transfer above ₹50,000, and credit card transaction triggers an OTP authentication under RBI's 2-Factor Authentication mandate. The RBI's Master Direction on Digital Payment Security Controls requires banks and payment aggregators to implement OTP-based 2FA with specific expiry and attempt-limit parameters.

TechTo Networks is compliant with RBI's digital payment security requirements and supports the sub-3-second OTP delivery that payment flows demand.

E-Commerce

Customer account creation, login, payment confirmation, and return initiation all trigger OTP verification on Indian e-commerce platforms. Peak OTP volumes occur during sale events — Flipkart Big Billion Days and Amazon Great Indian Festival generate OTP request volumes 15–20x normal daily traffic in a matter of hours. Providers without elastic infrastructure throttle and fail during these events.

Healthcare

Apollo, Practo, and thousands of smaller clinic management systems use OTP for patient login, prescription access, lab report delivery, and telemedicine session initiation. ABDM (Ayushman Bharat Digital Mission) mandates OTP-based verification for health ID creation and health data access consent.

Education and Ed-Tech

Student account creation, exam portal login (NTA, state boards, UPSC), and online proctored exam initiation all require OTP verification. India's exam season — January to May — creates sustained high-volume OTP demand across thousands of concurrent exam takers.

Logistics and Delivery

OTP-based delivery confirmation (Delivery OTP) has become standard across Indian logistics companies — Delhivery, Ecom Express, Xpressbees, and all major courier partners. A failed delivery OTP means a missed delivery event and a customer escalation. Delivery OTPs are time-critical: the delivery agent is standing at the door.

Government and Public Sector

DigiLocker, Aadhaar e-KYC, UMANG, and state government portals all use OTP-based citizen authentication. These systems must maintain near-zero failure rates given the scale of users and the critical nature of the services accessed.

OTP Fraud Prevention: Protecting Your Business in 2026

SMS pumping fraud — where fraudsters trigger thousands of fake OTP requests to premium-rate numbers — has become one of India's most prevalent forms of CPaaS fraud in 2026. Airtel launched AI-powered fraud detection specifically targeting OTP fraud in early 2026, reflecting how serious this threat has become.

TechTo Networks' fraud prevention layer includes:

Request rate limiting: Configurable per-IP and per-device request limits. If a single IP triggers more than X OTP requests in Y minutes, the IP is automatically flagged and requests are held for human review.

Phone number pattern analysis: Fraudulent AIT traffic typically targets number ranges with high premium-rate revenue. TechTo's fraud engine maintains a live blocklist of known AIT-associated number ranges, updated daily.

Velocity checks: If a specific mobile number receives more than 3 OTP requests in 10 minutes across your account, an alert is triggered and subsequent requests require additional verification at the application layer.

Geographic anomaly detection: If OTP requests originate from IP addresses inconsistent with your user's typical geographic pattern — for example, a loan app whose users are all in India receiving requests from Eastern European IPs — the anomaly is flagged immediately.

Conversion tracking: TechTo tracks OTP-to-verification conversion rates per originating IP. A source generating OTP requests with 0% verification conversions is a fraud signal — legitimate users verify their OTPs.

Frequently Asked Questions About OTP Service Providers in India

What is an OTP service provider? An OTP service provider is a platform that generates one-time passwords, delivers them to mobile users via SMS, voice call, or WhatsApp, and verifies the entered code against the generated value. In India, OTP service providers must be DLT-registered and route messages through TRAI-compliant infrastructure.

Is DLT registration mandatory for sending OTP SMS in India? Yes, DLT registration is mandatory for all commercial OTP SMS in India under TRAI's TCCCPR 2018 regulations. You must register your business entity, sender ID (header), and OTP message template on a TRAI-approved DLT portal before sending a single OTP. Messages sent without DLT compliance are blocked by all four Indian telecom operators. The process takes 5–10 business days. TechTo Networks assists with DLT registration as part of onboarding.

How fast should OTP delivery be? Premium OTP service providers deliver SMS OTP in under 3 seconds for 95% of messages (P95). Anything beyond 5 seconds measurably increases user abandonment — users either abandon the flow or trigger repeated resends, inflating your costs. Always test providers during peak evening hours (6–9 PM IST) to verify real-world P95 performance, not just average speed.

What is Tier-1 routing for OTP and why does it matter? Tier-1 routing means your OTP provider connects directly to the telecom operator's SMSC without passing through intermediary aggregators. Each intermediary adds 1–3 seconds of latency and an additional failure point. For OTP delivery — where every second affects conversion — Tier-1 routing is essential. TechTo Networks uses Tier-1 direct routes with Jio, Airtel, Vi, and BSNL.

What is SMS pumping fraud and how do I protect against it? SMS pumping (Artificially Inflated Traffic or AIT) is a fraud where attackers trigger fake OTP requests to premium-rate numbers, generating fraudulent revenue from inflated SMS volumes. Protection requires AI-powered rate limiting, IP geolocation analysis, number pattern blocklisting, and velocity monitoring. TechTo Networks includes all of these in its OTP fraud prevention layer at no additional cost.

Can I send OTP via WhatsApp instead of SMS? Yes. WhatsApp OTP is increasingly used in India as a fallback channel when SMS delivery is delayed. WhatsApp OTP requires an approved Meta Business Account and a verified WhatsApp Business API connection. TechTo Networks supports WhatsApp OTP alongside SMS OTP from a single API, with configurable automatic fallback from SMS to WhatsApp after a defined timeout.

What happens if my OTP template is rejected on DLT? A rejected DLT template means your OTP messages will be silently blocked — the API call will appear successful but the subscriber receives nothing. Common rejection reasons include missing sender ID suffix, missing "do not share" instruction, promotional language, and incorrect variable formatting. TechTo Networks validates your template against DLT requirements before submission and assists with rejection remediation.

How much does OTP SMS cost in India? OTP SMS pricing in India ranges from ₹0.12 to ₹0.22 per OTP depending on the provider, route quality, volume, and whether DLT charges are included. Beware of providers advertising ₹0.10–₹0.12 — these typically use aggregator routes with higher failure rates, and DLT charges are added separately. TechTo Networks' Tier-1 OTP SMS starts at ₹0.18 with DLT charges included.

Why Indian Businesses Choose TechTo Networks for OTP

TechTo Networks is built for the specific challenges of OTP delivery in India — not adapted from a global product.

Direct Tier-1 routes with Jio, Airtel, Vi, and BSNL mean your OTPs do not pass through aggregators. P95 delivery under 8 seconds across all operators, including peak hours.

Full DLT compliance automation. Entity registration assistance, real-time template validation, header management, and NCPR scrubbing handled at the platform level. You do not need to understand the DLT portal to send compliant OTPs.

AI-powered fraud prevention. Rate limiting, velocity monitoring, number pattern analysis, and geographic anomaly detection protect your OTP budget from SMS pumping attacks.

Multi-channel with automatic fallback. SMS primary, Voice and WhatsApp fallback configured in a single API call. No separate integrations.

Transparent pricing. ₹0.18 per OTP via SMS, DLT charges included, no hidden fees. Volume discounts from 1,00,000 OTPs per month.

24/7 support with a dedicated account manager. Not a ticketing queue — a named contact who knows your integration and can escalate delivery issues in minutes.

TRAI, RBI, and ABDM compliant infrastructure. Covering the regulatory requirements for fintech, banking, healthcare, and government OTP use cases.

Ready to send your first OTP in under 3 seconds?

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TechTo Networks Pvt. Ltd. | TRAI DLT Registered | Tier-1 Operator Routes | Kerala, India