India's #1 Bulk SMS & WhatsApp Business API — Sub-Second OTP Gateway Built for Indian Cities
Engineered for high-volume Indian engineering teams and product leaders: direct telecom SMPP pipes, automated TRAI DLT Scrubbing, and Meta Cloud API integration with 99.98% uptime SLA.
Full-Stack Enterprise CPaaS Solutions
Complete multi-channel engagement stack tailored for Indian enterprises, startups & developers.
DLT-Compliant Bulk SMS
Deliver promotional, transactional, and service-implicit SMS with zero queuing. Complete support for TRAI DLT headers, PE-TM binding, and real-time delivery callbacks.
WhatsApp Business API
Automate customer support, click-to-WhatsApp ads, OTP delivery, order tracking, and broadcast campaigns with rich interactive buttons and payment links.
RCS Business Messaging
Replace plain SMS with high-converting rich cards, carousels, action buttons, verified blue badges, and zero-app interactive catalogs directly inside Android Messages.
Voice API & Automated Call OTP
Never lose a sign-up. When SMS OTPs face network delays in Tier 2/3 cities, Tekhook automatically triggers instant Voice OTP calls in regional accents.
Flash OTP Gateway
Ultra-low latency dual-path routing engine built specifically for Indian banking apps, UPI signups, quick-commerce checkouts, and gaming platforms.
Check DLT Header & Entity Compliance Status
Instantly test Header approval across Jio, Airtel, Vi & BSNL portals before dispatch.
Need DLT Entity & Header Registration in India?
New to TRAI DLT? Our dedicated compliance team helps register your Entity ID on Jio, Airtel, Vi, and BSNL portals, claim brand headers, and approve templates in under 4 hours.
Included Free for Indian Businesses:
- Free Entity ID Validation
- PE-TM Chain Binding
- Dynamic Variable Pre-Checker
- 10,000 Free Test Credits
Tekhook for Every Indian Industry
Tailored CPaaS workflows, compliance templates & growth playbooks for 10+ sectors — from Mumbai fintechs to Kota coaching hubs.
The Numbers Behind India's No.1 CPaaS
How Tekhook Works
From signup to first dispatch in under an hour — with free DLT assistance every step.
Sign Up & Get 10,000 Free Credits
Create your Tekhook India account and instantly receive 10,000 free test credits — no credit card required. Explore the dashboard, SDKs and webhook sandbox.
Register DLT Entity & Headers (We Assist Free)
Our compliance team registers your Entity ID and Sender Headers on Jio, Airtel, Vi & BSNL DLT portals, and approves content templates within 4 hours.
Integrate API or Upload Contact List
Plug into our REST API with Node.js/Python/PHP SDKs, or upload your DND-scrubbed contact list via the campaign dashboard for instant broadcast.
Launch & Monitor in Real-Time
Dispatch SMS, WhatsApp, RCS or Voice OTPs and watch live delivery analytics, DLR callbacks, and conversion tracking from the unified Tekhook dashboard.
India's Brands Grow with Tekhook
"Tekhook cut our UPI signup OTP latency from 2.1s to 0.4s. Abandoned signups dropped by 22% overnight. The DLT team handled all four portals for us."
Priya Nair
VP Engineering • NeoFin Payments
FinTech • Mumbai
"Switching COD confirmations to Tekhook Voice OTP reduced our RTO by 38%. The WhatsApp cart-recovery flow now recovers 1 in 4 abandoned carts."
Rohan Mehta
Head of Growth • ShopVeda D2C
E-Commerce • Bengaluru
"Multi-step SMS + WhatsApp reminders reduced OPD no-shows by a third. Vernacular Tamil messaging reaches our Tier 2/3 patients perfectly."
Dr. Karthik R.
Chief Digital Officer • Apex Hospitals
Healthcare • Chennai
Built Different for Indian Enterprises
Sub-Second OTP SLA
0.4s average OTP delivery across all circles with dual-path routing and automatic WhatsApp/Voice fallback — built for India's banking & quick-commerce scale.
100% DLT Compliance
Every message pre-validated against TRAI DLT. Free Entity ID, Header & template registration on Jio, Airtel, Vi & BSNL portals by our in-house compliance team.
Pan-India + Vernacular
Local circle routing across 16+ cities and 12+ Indian languages. BSNL integration reaches the deepest Tier 3 pincodes with 99% delivery.
Smart Fallback Engine
When SMS fails, Tekhook auto-retries via WhatsApp, then Voice — so mission-critical OTPs and alerts always reach your users.
Developer-First APIs
REST API with Node.js, Python & PHP SDKs, webhook sandbox, and real-time DLR callbacks. Go live in under an hour with copy-paste code.
Live Analytics Dashboard
Real-time delivery analytics, conversion tracking, campaign A/B testing and DLR audit logs — all in one unified Tekhook dashboard.
Unified Omnichannel Engagement Stack
Trigger the right message on the right channel — SMS, WhatsApp, RCS, Voice, Email or Push — from a single Tekhook API call with intelligent fallback routing.
Bulk SMS
Promo & Transactional
WhatsApp API
Official BSP Partner
RCS Messaging
Rich Cards & Carousels
Voice OTP & IVR
Multi-lingual Calls
Transactional Email
Inbox-optimized SMTP
Push Notifications
Android, iOS & Web
Ship in Hours, Not Weeks — With Tekhook APIs & SDKs
RESTful APIs, official SDKs for Node.js, Python, PHP & Java, webhook sandbox, and real-time DLR callbacks. Go live in under an hour with copy-paste code samples and Postman collections built for Indian developer teams.
REST + Webhooks
Versioned v1 API with sandbox
API Keys & OAuth
Scoped tokens & rotation
Real-time DLR
Delivery callbacks per message
Bulk Import
CSV / API contact sync
const tekhook = require('tekhook')(
process.env.TEKHOOK_API_KEY
);
await tekhook.otp.send({
channel: 'auto', // SMS → WA → Voice
sender_id: 'TEKHOK',
dlt_template_id: '17071612345678',
recipient: '+919876543210',
otp: '9482',
validity: 300, // 5 mins
fallback: ['whatsapp','voice']
});India's Fastest CPaaS — Proven by Numbers
Independently audited delivery metrics across Jio, Airtel, Vi & BSNL circles during peak Diwali & IPL campaign loads.
Mumbai & Delhi NCR Telecom Circle SLA
Real-time OTP dispatch latency measured directly across Tier 1 telecom switching centers.
TRAI, ISO 27001 & DPDP-Compliant by Design
Tekhook is built to meet the strictest Indian regulatory standards — TRAI DLT 2.0, the Digital Personal Data Protection (DPDP) Act 2023, and ISO 27001 information security. Every payload is encrypted, audit-logged, and stored in Indian data centres for data sovereignty.
Compliance Included Free
- Free DLT Entity ID & Header registration
- Template pre-approval & variable checker
- PE-TM chain binding on all 4 operators
- DPDP consent log & audit trail export
- Dedicated Indian compliance manager
From Kashmir to Kanyakumari — in 12+ Indian Languages
Local circle routing reaches every Tier 1/2/3 pincode, while Unicode SMS & WhatsApp templates support Hindi, Tamil, Telugu, Bengali, Marathi, Kannada, Malayalam, Gujarati, Punjabi, Urdu, Odia & Assamese.
Vernacular Messaging
Send OTPs & marketing campaigns in your customer's native script with full Unicode support — boosting engagement by up to 3× in Tier 2/3 markets.
28 States · 8 UTs
Direct operator integrations with Jio, Airtel, Vi & BSNL ensure last-mile delivery even in remote pincodes with rural BSNL coverage.
24×7 Indian Support
Mumbai-based support team available round-the-clock in English, Hindi & regional languages — with a 15-minute callback SLA for all enterprise accounts.
Tekhook vs Generic SMS Providers
| Capability | Tekhook | Generic Providers |
|---|---|---|
| TRAI DLT 2.0 Compliance | ||
| Sub-second OTP SLA (0.4s) | ||
| Official WhatsApp BSP Partner | ||
| Smart SMS→WhatsApp→Voice Fallback | ||
| 12+ Indian Language Unicode | ||
| Free 10,000 Test Credits | ||
| India Data Residency (DPDP) | ||
| 24×7 Mumbai-based Support |