← Reach · Communication

Send SMS to lakhs in minutes — DLT-compliant, 99% delivered.

Promotional, transactional and OTP SMS at carrier-grade scale. Sub-second OTPs, smart sender-ID routing, every Indian language, full delivery analytics.

Live in 48 hours. Direct operator routes — no middlemen, no surprise mark-ups.

Get Custom SMS Quote Chat on WhatsApp

✓ DLT-registered ✓ 99%+ delivery ✓ Sub-second OTPs ✓ All Indian languages ✓ TRAI-compliant

Quick check — 30 seconds

Is Bulk SMS the right channel for you?

✓ Yes, use SMS if…

You need OTPs delivered in under 5 seconds reliably
You want to reach customers without smartphones / data plans
You send transactional alerts — order updates, EMI reminders, lab reports
Your audience is in Tier-2 / Tier-3 India where WhatsApp reach varies
You need a regulator-compliant audit trail for messages

✗ Maybe not, if…

You want to send images, PDFs, videos or buttons — use WhatsApp Business API instead
You need two-way conversations with customer replies — WhatsApp or IVR fits better
You only have a handful of contacts (under 1,000) — manual messaging may suffice
Your message is under 160 characters very rarely — long copy gets truncated or split-billed

Why SMS still matters

When delivery has to happen.

99%+

delivery rate on direct operator routes — works on every phone, even without internet.

< 5s

average OTP delivery latency on the dedicated authentication route.

5M+

SMS in a single campaign — no throttling, no batching delays, carrier-grade scale.

2.3×

SMS reach in Tier-2/3 India vs internet-only channels.

Pick the right route

Three SMS categories. Three rules.

India's TRAI mandates strict category rules. Pick wrong → templates rejected, messages bounce. We map every campaign to the correct lane on day one.

Transactional

Order updates, EMI reminders, alerts

Customer-triggered or service-related notifications. No 24×7 send window restriction.

Sent any time — including DND-registered numbers (with proper category)
6-character alpha sender ID (e.g., DIGSTU, AMZN, ICICIB)
DLT template registration required (we handle)
Used for: shipping updates, payment receipts, account alerts, lab reports
Lowest cost per-SMS tier

Promotional

Marketing offers, discounts, launches

Outbound marketing to opted-in customers. Send window restricted (9 AM – 9 PM).

9 AM – 9 PM only as per TRAI
Skips DND registered numbers automatically
Numeric sender (e.g., 800xx) or DLT-approved alpha header
Used for: sale announcements, loyalty offers, festival campaigns, lead generation
Higher per-SMS cost than transactional

Service / OTP

Authentication, login OTPs, 2FA

Time-sensitive auth codes on dedicated low-latency infrastructure.

Sub-5-second delivery on dedicated OTP route
24×7 — no time restrictions
Service Implicit / Service Explicit / Auth sub-categories
Used for: banking OTPs, login 2FA, password resets, payment confirmations
Carrier-grade redundancy with auto re-route on flaps

When to use what

SMS vs WhatsApp vs Email — quick comparison.

Factor	Bulk SMS	WhatsApp Business API	Email
Works without internet	Yes	No (needs data)	No (needs data)
Delivery rate (India)	99%+	~95% (opted-in)	~80% (inbox + spam)
Open rate	~95% (most read)	90%+	~18%
Time to deliver OTP	< 5 seconds	~ 5–10 seconds	30+ seconds (often spammed)
Rich media (image / PDF / video)	No	Yes	Yes
Two-way replies	Yes (long-code / shared number)	Yes	Yes
Per-message cost (India)	Lowest	Mid	Lowest at scale
Best for	OTPs, alerts, mass reach	Engagement, support, commerce	Detailed content, B2B

Most growing businesses use SMS for guaranteed delivery (OTPs, transactional) and WhatsApp for rich engagement (offers, support, catalogue). We help you set up the right mix.

What you actually get

Send. Authenticate. Track. Sab ek dashboard pe.

Send to lakhs in minutes

Mass campaigns or 1:1 personalised drops — at scale, without rate-limits or throttling surprises.

Bulk upload via CSV / Excel with column mapping
Personalisation — name, city, order ID, dynamic offers
Schedule for later — choose date, time, time-zone
Drip flows — sequenced sends triggered by user action
All Indian languages — Hindi, Marathi, Gujarati, Tamil, Telugu, Bengali, Kannada, Punjabi
URL shortener + click tracking built in
Smart sender-ID rotation across volume
2-way SMS for surveys + replies (long-code support)
5M+ SMS per campaign — no throttling
Unlimited contacts & sender IDs — no per-list cap

Authenticate with sub-5s OTPs & 2FA

Mission-critical authentication on a dedicated, redundant route — built for banking, payments, login flows, and 2-factor security.

Dedicated OTP infrastructure — no contention with marketing traffic
2FA / 2-factor authentication codes for logins, payments, password resets
Direct operator binds for sub-second delivery
Auto-failover across multiple operators
OTP-specific Service / Auth category templates
Numeric verification with retry + resend logic
PCI-aware logging — no PII stored beyond compliance window
Webhook callbacks on delivery confirmation

Track every message, every click

Full visibility from send → delivered → clicked → converted. Audit-ready logs for regulators and CFOs.

Real-time delivery dashboard — sent, delivered, failed, pending
Per-operator breakdown — see which carriers throttle
Click analytics on shortened URLs
Campaign A/B testing — copy variants, send-time optimisation
Bounce / unsubscribe handling with auto opt-out registry
CSV exports + scheduled email reports
DLT-compliant audit trail for every send

Setup workflow

First campaign live in 48 hours.

DLT register

We register your business on the TRAI DLT portal — entity registration, sender ID, header. Usually live in 24 hours.

Templates approved

We design your transactional, promotional and OTP templates and submit for DLT approval. Most go through in 24–48 hours.

Test & verify

Test batch to your team's numbers across operators. Verify formatting, link tracking, sender ID display, latency.

Go live

Full campaign goes out. Real-time dashboard handed over. Our team is on WhatsApp for the first 30 days.

In the wild

SMS that pays for itself.

BFSI

OTPs without drop-offs

Login, payments, transfers — sub-5s OTP delivery on dedicated infra. Auto-failover across operators means no transaction stuck because one carrier flapped.

E-commerce

Order journey, end-to-end

Order placed → confirmed → shipped → out-for-delivery → delivered → review request. Every step automated, branded with your sender ID, tracked.

Healthcare

Appointment + lab report nudges

Booking confirmation → reminder 24h before → reminder 1h before → lab report ready link. No-shows drop, front-desk freed up.

Education

Admissions, fees, parent updates

Form submitted → confirmation → payment link → admission status → parent attendance updates. Hindi + English. Reaches every parent, even on basic phones.

Real Estate

Lead alerts to brokers

Site enquiry → instant SMS to broker with name, project, budget — broker calls back within 5 minutes. First-response wins the deal.

Government & Public

Citizen advisories at state scale

Multilingual public-service messages — health, weather, civic alerts — reach every citizen including non-smartphone users. Carrier-grade infrastructure.

Integrations

Plug SMS into your stack.

REST API, webhooks, and native connectors. Trigger SMS from any signup, order, transaction or workflow event.

REST API

Webhooks

Shopify

WooCommerce

Razorpay

Zoho CRM

HubSpot

Salesforce

LeadSquared

Tally

Custom ERP

Zapier

Pricing model

Per-message rate-card. No mark-up surprises.

SMS pricing in India varies by route, operator and volume tier. We bill at direct operator rates with a transparent platform margin — every line item visible on your monthly invoice.

Transactional

Order + alert SMS

Lowest-cost tier. Customer-triggered or service-related notifications.

DLT entity + template registration included at signup
One alpha sender-ID (e.g., DIGSTU) included
Per-SMS rate quoted on volume tier
No setup fee for entity already on DLT

Promotional

Marketing campaigns

Mid-tier pricing. Sent only 9 AM – 9 PM, skips DND-registered numbers.

Numeric or alpha sender-ID per campaign
Per-SMS rate higher than transactional
URL shortener + click analytics included
Personalisation, scheduling, A/B testing included

Service / OTP

Authentication route

Dedicated low-latency infrastructure. Volume-discounted at scale.

Sub-5s delivery SLA on dedicated route
Auto-failover across multiple operators
Per-OTP rate fixed by category
Carrier-grade redundancy + 99.9% uptime

Per-SMS rates depend on your monthly volume bracket (10K, 1L, 10L+) and route mix. We send a written rate-card within 24 hours of your enquiry. No hidden fees, no auto-renewal traps, no minimum commitment.

Get Your Rate-Card Quick Quote on WhatsApp

All Digisetu prices exclusive of 18% GST. Operator rates are pass-through, billed at the official telecom rate.

FAQ

DLT, sender IDs, delivery — answered.

What is DLT and why is it required for Bulk SMS in India?

DLT (Distributed Ledger Technology) is the registry mandated by TRAI (India's telecom regulator) for all commercial SMS senders. Every business entity, sender ID and message template has to be registered before any operator will deliver messages. Without DLT, your messages get blocked at the carrier. We handle the entire DLT registration for you — usually live in 24 hours.

What's a "sender ID" and how do I get one?

Sender ID is the 6-character alpha header customers see on the SMS (e.g., DIGSTU, ICICIB, AMZN). You pick three options at DLT registration; we submit and get one approved. Numeric short-codes (like 800xx) are also available for promotional campaigns. Each sender ID costs a small monthly rental on the DLT portal.

How long does DLT registration take?

For a standard private limited / LLP / proprietorship with valid GST and PAN: 24 hours for entity registration, and another 24–48 hours for sender-ID + first batch of templates. From contract to first live SMS, we target 48 hours total.

Can I send SMS in Hindi or other Indian languages?

Yes — Hindi, Marathi, Gujarati, Tamil, Telugu, Kannada, Bengali, Punjabi, Marwadi, all major Indian languages. Note that non-English SMS uses Unicode encoding which makes each SMS shorter (70 characters per part vs 160 for English). We help you balance copy length with character cost.

What's the difference between DND and non-DND numbers?

DND (Do Not Disturb) is TRAI's customer opt-out registry for unwanted promotional SMS. Promotional messages skip DND-registered numbers automatically. Transactional and Service / OTP categories deliver to all numbers, including DND. We classify your campaigns into the right category to ensure delivery.

Why are some words / phrases blocked in templates?

DLT auto-rejects templates that look spammy or violate TRAI guidelines (excessive caps, "FREE", "GUARANTEED", unsubstantiated claims, certain financial product terms). Our copywriters write templates that pass on the first attempt — our average first-attempt approval rate is around 92%.

What's the SMS character limit?

English SMS: 160 characters per part; longer messages get split into multiple billed parts (160 / 306 / 459…). Unicode (Hindi etc.): 70 characters per part. We optimise template length to keep each message in single-part if possible, and clearly show split-billing in your usage report.

Can I see who clicked the link in my SMS?

Yes — short URLs in your messages are tracked. You see total clicks, unique clicks, click-through-rate, and click-time distribution per campaign. Per-recipient click tracking is available on request.

What happens if the operator route flaps?

Our platform monitors per-operator delivery rates in real time. If a route degrades, we automatically switch to a backup carrier without you doing anything. You'll see this in the dashboard as "auto-failover" events — and your customers don't notice a thing.

Is there a minimum order or annual commitment?

No annual commitment, no monthly minimum. Pay for what you send, recharge as you grow. Volume discount tiers kick in automatically once you cross 1L / 10L / 50L SMS / month.

Often paired with

SMS + these = full-stack reach.

Ready to send your first 1 lakh SMS?

Send us your business name + GSTIN. We start DLT registration the same hour and have your first batch live within 48 hours. Bina commitment, bina set-up fee.

Apply for Bulk SMS Chat on WhatsApp

✓ DLT registration included ✓ No setup fees ✓ No annual commitment ✓ Live in 48 hours