FREEDOM251

Freedom251 › Transactional SMS Software

QuickAuth Transactional SMS API

Free plan AndroidAPIiPhoneWeb

Visit QuickAuth Transactional SMS API Alternatives Pricing

QuickAuth Transactional SMS API's own site

What QuickAuth Transactional SMS API is

QuickAuth Transactional SMS API provides one API for authentication and messaging through WhatsApp, SMS, RCS, and email. For OTP delivery, it can try WhatsApp first and automatically use DLT-registered SMS when WhatsApp does not deliver. SDKs for web, React Native, iOS, Android, and Flutter support OTP auto-read or autofill on Android and iOS. The HTTP API includes webhooks, server-side retries, and fallback handling. Bulk WhatsApp campaigns can use several WABAs, rechecking sender and template health between waves. Campaign reporting tracks template button taps by recipient and campaign and supports audience segmentation. QuickAuth describes fraud controls using suspicious-prefix scores, velocity and ratio checks, IP and device quotas, and optional device fingerprinting. It says data is stored in Mumbai, phone numbers are hashed, and OTPs are deleted five minutes after verification. A free tier requires no credit card; paid volume pricing is quoted on request.

Who it suits

It suits teams needing authentication, transactional messaging, or bulk WhatsApp campaigns across web and mobile apps. It is also aimed at organizations needing DLT registration support and stated fraud controls.

What it does well

  • WhatsApp-first OTP with automatic SMS fallback
  • SDKs include web, iOS, Android, Flutter
  • Webhooks and server-side retries supported
  • Free tier requires no credit card
  • DLT setup included at no extra charge

What to know first

  • Paid pricing is quoted rather than published
  • OTP deletion occurs five minutes after verification
  • WhatsApp campaigns depend on WABA and template health

Limits

The free tier is available without a credit card, but paid custom-volume pricing is quoted within 24 hours. Quotes vary with monthly volume, channel mix, template categories and fallback patterns.

Plans

PlanBilled and limitsPrice
Custom volume pricingQuoted within 24 hours based on monthly volume, channel mix, template categorization, and fallback patterns · Volume-based pricing · DLT registration included · authentication and bulk WhatsApp combined in one INR agreementOn request

As quickauth.in lists them, read 4 Oct 2026. The maker's own page has the final word.

Getting started

  1. Open the QuickAuth website
  2. Use the free tier without a credit card
  3. Contact the team for human onboarding
  4. Provide requirements for DLT, WABA and Meta verification
  5. Integrate the HTTP API or an available SDK
  6. Configure webhooks, retries and fallback for delivery

Verdict

QuickAuth combines OTP delivery, business messaging, campaign tools, and fraud controls in one API. Its free tier and broad SDK coverage are useful, while custom pricing requires a quote based on messaging needs.

Questions

Is there a free plan?

Yes. QuickAuth includes a free tier and says no credit card is required.

Which platforms and SDKs are supported?

The service supports Android, iOS, web and API use, with SDKs for web, React Native, iOS, Android and Flutter.

How much does paid use cost?

QuickAuth does not publish a fixed price list. Custom-volume quotes are provided within 24 hours based on monthly volume, channel mix, template categories and fallback patterns.

Does QuickAuth provide SMS fallback for OTPs?

Yes. OTPs can go through WhatsApp first and switch automatically to DLT-registered SMS if WhatsApp does not deliver.

What setup help is included?

The team handles DLT registration, sender IDs and template approvals at no extra charge, and says it usually starts DLT, WABA and Meta verification within a few hours.

Where is data stored?

QuickAuth says data is stored in Mumbai, phone numbers are hashed and OTPs are deleted five minutes after verification.

Facts from QuickAuth Transactional SMS API's own pages

API and SDKs
The HTTP API supports webhooks, server-side retries, and fallback, with SDKs for web, React Native, iOS, Android, and Flutter. · quickauth.in, 4 Oct 2026
Bulk messaging
Bulk WhatsApp campaigns can use a pool of WABAs, with sender and template health rechecked between waves. · quickauth.in, 4 Oct 2026
Campaign analytics
The platform says it tracks WhatsApp template button taps per recipient and campaign and offers audience segmentation. · quickauth.in, 4 Oct 2026
Data and compliance
QuickAuth says data is stored in Mumbai, phone numbers are hashed, OTPs are deleted five minutes after verification, and the service is SOC 2 Type II and aligned with India's DPDP Act 2023. · quickauth.in, 4 Oct 2026
DLT setup
QuickAuth says its team handles DLT registration, sender IDs, and template approvals, usually within 24 hours, at no extra charge. · quickauth.in, 4 Oct 2026
Fraud controls
The service describes suspicious-prefix scoring, velocity and ratio heuristics, per-IP and per-device quotas, and optional device fingerprinting to limit SMS-pumping fraud. · quickauth.in, 4 Oct 2026
Free tier
The site states that a free tier is included and no credit card is required. · quickauth.in, 4 Oct 2026
OTP autofill
Its SDK supports OTP auto-read or autofill on Android and iOS. · quickauth.in, 4 Oct 2026
OTP routing
OTP can be sent over WhatsApp first with DLT-registered SMS as an automatic fallback when WhatsApp does not deliver. · quickauth.in, 4 Oct 2026
Pricing limits
The company does not publish a fixed price list; quotes depend on monthly volume, channel mix, template categories, and fallback patterns. · quickauth.in, 4 Oct 2026
Product
QuickAuth provides one API for authentication, WhatsApp, SMS, RCS, and email messaging. · quickauth.in, 4 Oct 2026
Support
The site offers human onboarding and says its team typically starts DLT, WABA, and Meta verification setup within a few hours, with a response within 24 hours. · quickauth.in, 4 Oct 2026

Where QuickAuth Transactional SMS API stands on Freedom251

Look at these too