FastOTP-VN is a personal OTP gateway for developers and small teams that need to send SMS OTPs to users in Vietnam — fast, inexpensive, and without complicated brandname procedures.

The issues with Firebase or traditional SMS gateways:

• You have to register a brandname and wait for approval for several days

• High costs, lack of transparency for individuals

• Too heavy for an MVP or small side project

FastOTP-VN addresses exactly those points:

• Register an account → top up wallet → get API key → send OTP on the same day

• Supports all Vietnam mobile prefixes (Viettel, Mobifone, Vinaphone, Vietnamobile, Gmobile...)

• API response ~1 second, integrates into existing web/mobile without needing to change architecture

• API key is encrypted per app, with a dashboard to monitor logs and verify status in real-time

• Pay-as-you-go pricing, no fixed subscription, no hidden fees

Suitable for: solo developers, small startup teams, products in the MVP stage that need OTP to run very quickly without getting bogged down by procedures.

🌐 fastotp-vn.one