Launch Bulk SMS, WhatsApp Business API, RCS, Voice IVR and Outbound Dialer campaigns from a single dashboard and a single REST API. DLT, TRAI and DPDPA compliant by default — sub-3s OTP, 99.9% uptime, carrier-grade infra.
Every number below is live in production for brands like Paytm, Swiggy, Meesho and 15,000 more — measured, published, never cherry-picked.
Your stack on the left, 2Factor's unified gateway in the middle, every messaging channel on the right — all orchestrated with a single integration.
From sub-3-second OTPs to interactive RCS carousels — pick the right channel for every customer conversation, without juggling vendors or stitching APIs.
DLT & TRAI-compliant bulk SMS gateway for OTP, transactional and promotional SMS across India — sub-3-second OTP delivery with direct operator interconnects, Unicode and 22 regional languages.
Explore Bulk SMSReach 500M+ Indian users with the verified green-tick WhatsApp Business API — also called Cloud API / WhatsApp Business Platform — with chatbots, team inbox & Flows.
Explore WhatsApp APIBranded RCS (Rich Communication Services) with your logo, colours, cards & carousels on the native Android SMS app — with auto-fallback to SMS when RCS isn't available.
Explore RCSFull cloud telephony stack — voice OTP in 15+ Indian languages, smart IVR & call routing, virtual numbers, call tracking & conversational AI — all on one dashboard.
Explore Voice & IVRAutomated voice broadcasts for surveys, reminders & collections, with dynamic TTS, DTMF capture and press-1 transfer to your agents in real time.
Explore OBDA single OTP API that tries WhatsApp → SMS → Voice → Email in sequence, so your user always gets the code. 99.5% first-attempt success across India.
Explore 2FA / OTPA quick, honest answer to India's most-asked CPaaS question. Use the table below as a rule of thumb; 2Factor's unified API lets you combine channels with smart failover when a single channel isn't enough.
Best for OTPs, transactional alerts, compliance notifications and any message that absolutely must reach every phone — feature or smartphone — in India.
Best for conversational marketing, rich notifications, customer support and in-chat commerce with India's 500M+ daily WhatsApp users. Includes chatbots, Flows and payments.
Best for branded promotional messaging with your logo, colours, carousels and quick-reply buttons — right inside the native Android SMS app, with automatic SMS fallback.
Best for OTP delivery when SMS is unavailable, regional-language voice prompts, inbound IVR routing and customers who prefer a phone call over text.
Answers to the high-intent questions CTOs, growth leads and developers type into Google and AI assistants every day — written in plain English, optimised for AI citations.
Sign up for a bulk SMS API provider like 2Factor, complete DLT registration (Jio/Airtel/Vi/BSNL) for your Header and templates, then POST to /API/V1/SMS/SEND with your API key, recipient number and DLT template ID. First SMS in under 5 minutes; bulk throughput of millions per hour.
Partner with a Meta BSP like 2Factor.in, submit your verified Facebook Business Manager, domain-verified website and notable brand proofs. Green-tick approval typically takes 4–6 weeks. Once live, you can send WhatsApp template messages, build chatbots, deploy Flows and accept in-chat payments.
Get WhatsApp Business API →Transactional / OTP SMS on 2Factor starts at ₹0.12 per SMS; promotional SMS from ₹0.11. WhatsApp Business API is billed per-conversation at Meta's 2026 rates (authentication ~₹0.115, utility ~₹0.115, marketing ~₹0.78), with zero platform markup. Voice OTP from ₹0.25 per minute.
Compare CPaaS pricing →DLT (Distributed Ledger Technology) is a TRAI-mandated registry for every entity sending commercial SMS in India. You must register your business entity, Header (sender ID) and every message template on your chosen operator DLT portal. 2Factor offers free end-to-end DLT onboarding, including scrubbing, template approval and sender-ID go-live.
DLT FAQ →For raw speed and universal delivery, SMS wins (sub-3s, works on any phone). For cost on smartphones and for brand experience, WhatsApp OTP wins (sub-2s, ~₹0.115 per auth conversation, green-tick branded). The smartest answer in India is multi-channel OTP: try WhatsApp first, fall back to SMS, then Voice — 99.5%+ success at the lowest blended cost.
Activate multi-channel OTP →Yes. 2Factor is India-first and channel-complete: a truly unified API across SMS + WhatsApp + RCS + Voice + OBD (most competitors cover only 1–2 channels), zero platform markup on WhatsApp, direct DLT-compliant SMS routes, India-resident data & support, and typically 20–40% lower total cost than Twilio for Indian traffic.
See full comparison →Direct telco interconnects, AI-powered routing and developer-friendly APIs — all from a single dashboard.
Plug our REST & webhook APIs into your app in minutes. Clear docs, SDKs for Node.js, Python, PHP, Java, .NET and Go, plus 24×7 developer support.
// Send an OTP with a single API call
const res = await fetch(
"https://2factor.in/API/V1/OTP/SEND",
{
method: "POST",
headers: { "X-API-Key": key },
body: JSON.stringify({
to: "+919876543210",
channel: "SMS",
template: "LOGIN_OTP"
})
}
);
const data = await res.json();
console.log(data.status); // "sent"ISO 27001 certified. SOC 2 aligned. DLT, TRAI & DPDPA compliant out of the box. Dedicated IPs, VPC peering and custom SLAs for enterprises.
Enterprise features available to every customer, from day one.
India's fastest OTP delivery powered by direct telco interconnects and intelligent fallback.
TLS 1.3, AES-256 encryption at rest, role-based access and audit trails for every action.
Delivery, conversion and engagement dashboards for every channel, campaign and template.
White-label the platform for your clients with custom domains, branding and reseller billing.
Drag-and-drop campaign designer for SMS, WhatsApp & OBD — no engineering required.
Real humans, always. Phone, email, chat and dedicated Slack for enterprise customers.
From fintech to logistics, 2Factor helps teams send billions of mission-critical messages every year.
Login OTPs, transaction alerts, KYC verification & collection reminders delivered with regulatory compliance.
Abandoned cart recovery, order updates, cash-on-delivery confirmations and promotional campaigns.
Dispatch alerts, delivery OTPs, driver OBD calls and real-time shipment tracking notifications.
Class reminders, fee alerts, student OTP sign-ins and personalized WhatsApp engagement.
Appointment reminders, teleconsult links, prescription alerts and HIPAA-ready voice confirmations.
Booking confirmations, itinerary updates, feedback surveys and multi-language voice alerts.
We migrated our entire OTP stack to 2Factor within a weekend. Delivery rates jumped from 91% to 99% and latency dropped by half. The dev team is incredibly responsive.
WhatsApp Business API through 2Factor transformed our customer support. Response times dropped 65% and CSAT scores are at an all-time high. The team was critical during our green-tick onboarding.
OBD campaigns for our collections team have become massively more efficient. Press-1 connect routes calls directly to our agents, and the real-time dashboard gives us full visibility.
If you're buying SMS from one vendor, WhatsApp from another and Voice from a third, you're paying for glue code, delivery gaps and finger-pointing. Here is a factual comparison of a point-solution stack vs the 2Factor CPaaS.
| Capability | Point solutions3–4 vendors · stitched | 2Factor CPaaSOne API |
|---|---|---|
| Channels covered | SMS or WhatsApp or Voice — one per vendor | SMS + WhatsApp + RCS + Voice + OBD + Email OTP on one API |
| Integration effort | 3–4 SDKs, 3–4 dashboards, 3–4 billing systems | One REST API, one dashboard, one invoice |
| OTP delivery | Often SMS-only — no auto-fallback | Smart failover WhatsApp → SMS → Voice → Email |
| India compliance | You navigate DLT, TRAI & DPDPA across 3 providers | DLT, TRAI, DPDPA configured for every channel, in-dashboard |
| WhatsApp Business API | Separate BSP contract, separate green-tick process | Official Meta BSP — green tick managed end-to-end |
| Unified analytics | Spreadsheets stitching vendor exports | Cross-channel funnel & delivery analytics in one place |
| Pricing model | Separate minimum commits per vendor | Pay-as-you-go across all channels — starts from 100 messages |
| Support & escalation | 3 support queues, no single-point accountability | One account manager, 24×7 India support, dedicated Slack |
| Uptime SLA | Combined SLA degrades to the weakest vendor | 99.9% platform SLA · 99.99% on enterprise |
In short: a point-solution stack works when you only need one channel. For any team that uses OTPs + notifications + marketing + support — which is almost every Indian digital business — a CPaaS like 2Factor.in is typically 30–50% cheaper, 2–3× faster to integrate and materially more reliable, because failover across channels is built in from day one.
Everything teams ask before moving to a unified CPaaS — answered in one place.
channel: "auto") and smart failover (for example WhatsApp → SMS → Voice → Email) so your user always receives the message. You can also pick a specific channel per campaign or template.