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QuickAuth Transactional SMS API
What it is
QuickAuth Transactional SMS API brings authentication and business messaging for WhatsApp, SMS, RCS, and email together through one API. For OTP delivery, it can try WhatsApp first and switch to DLT-registered SMS if WhatsApp does not deliver. Its SDK supports OTP auto-read or autofill on Android and iOS; the HTTP API includes webhooks, retries, and fallback, with SDKs for web, React Native, iOS, Android, and Flutter. Bulk WhatsApp campaigns can use a pool of WABAs, with sender and template health checked between waves. Campaign tools track template button taps and support audience segmentation. The service describes fraud controls using suspicious-prefix scoring, sending-pattern checks, IP and device quotas, and optional device fingerprinting. QuickAuth says data is stored in Mumbai, phone numbers are hashed, and OTPs are deleted five minutes after verification. A free tier is available without a credit card. Paid custom-volume quotes are provided within 24 hours, based on volume and messaging requirements; no fixed price list is published. The company says DLT setup is included at no extra charge.
For and against
For
- Free tier does not require a credit card
- WhatsApp OTP can fall back to SMS
- SDK supports OTP autofill on Android and iOS
- Includes webhooks, retries, and delivery status
- DLT registration is included at no extra charge
Against
- Paid pricing requires a custom quote
- No fixed price list is published
- Quotes depend on volume and messaging requirements
The verdict
QuickAuth combines OTP routing with API and SDK access for several messaging channels. A free tier is listed, while paid custom-volume pricing requires a quote.
Who it suits
QuickAuth suits businesses integrating OTP delivery or messaging across WhatsApp, SMS, RCS, and email. Its campaign features may also fit teams sending bulk WhatsApp messages and tracking audience response.
Plans and prices
Custom volume pricing
Volume-based pricing · DLT registration included · authentication and bulk WhatsApp combined in one INR agreement
Read 4 Oct 2026 · quickauth.in
On the record
- 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 · read 4 Oct 2026
- Bulk messaging
- Bulk WhatsApp campaigns can use a pool of WABAs, with sender and template health rechecked between waves.quickauth.in · read 4 Oct 2026
- Campaign analytics
- The platform says it tracks WhatsApp template button taps per recipient and campaign and offers audience segmentation.quickauth.in · read 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 · read 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 · read 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 · read 4 Oct 2026
- Free tier
- The site states that a free tier is included and no credit card is required.quickauth.in · read 4 Oct 2026
- OTP autofill
- Its SDK supports OTP auto-read or autofill on Android and iOS.quickauth.in · read 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 · read 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 · read 4 Oct 2026
- Product
- QuickAuth provides one API for authentication, WhatsApp, SMS, RCS, and email messaging.quickauth.in · read 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 · read 4 Oct 2026
