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SecondFactor
Stronger Authentication for a Safer World
SecondFactor is an OTP API for vibe-coders and product teams that delivers and verifies OTPs over SMS, WhatsApp, RCS, and Viber through a single integration. It's built for two-factor authentication (2FA), and OTP verification. It fits fintech, tech-enabled marketplaces, and international platforms that send OTPs to users in more than one country.
Top comment
SecondFactor is an OTP API for vibe-coders and product teams that delivers and verifies OTPs over SMS, WhatsApp, RCS, and Viber through a single integration. It's built for two-factor authentication (2FA), and OTP verification. It fits fintech, tech-enabled marketplaces, and international platforms that send OTPs to users in more than one country. The cost of OTP Delivery rises as you add countries, channels, and destinations. Even with these complications, the OTP often fails to arrive, causing valuable customers to abandon sign-up, or a purchase. This is where SecondFactor comes in: the Intelligence Engine identifies the destination country and operator, checks which channels are available, and uses automatic routing to send the OTP over the lowest-cost eligible channel. If the delivery isn’t confirmed within 8 seconds, automatic fallback moves to the next eligible channel. Your backend doesn't generate, store, or check the code itself. Instead, SecondFactor generates the code, picks the optimal channel, delivers the OTP and verifies it. The SecondFactor dashboard consists of every OTP's destination, channel, delivery status, and cost, in one place across all channels.With multiple SDKs alongside LLM-friendly API, integration with AI agents like Claude, Copilot, Cursor, etc. becomes seamless. If you are moving from another OTP provider, you keep a simple send-and-verify integration instead of rebuilding your verification workflow. With credible coverage of 130+ destinations, including the USA, UK, Germany, France, India, Mexico, Peru, Brazil, and many more, sending international OTPs is efficient, and reliable. Our clients – Rara Global Ventures, Lambda Payments, Janaki Technology, and Eventra – have experienced and appreciated the reliability of our service. Get started with SecondFactor and get your $5 in free credits. Test real OTP in the Playground.
About SecondFactor on Product Hunt
“Stronger Authentication for a Safer World”
SecondFactor was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #324 on the daily leaderboard. SecondFactor is an OTP API for vibe-coders and product teams that delivers and verifies OTPs over SMS, WhatsApp, RCS, and Viber through a single integration. It's built for two-factor authentication (2FA), and OTP verification. It fits fintech, tech-enabled marketplaces, and international platforms that send OTPs to users in more than one country.
On the analytics side, SecondFactor competes within API and Developer Tools — topics that collectively have 620.4k followers on Product Hunt. The dashboard above tracks how SecondFactor performed against the three products that launched closest to it on the same day.
Who hunted SecondFactor?
SecondFactor was hunted by SecondFactor. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of SecondFactor including community comment highlights and product details, visit the product overview.