Why 2FA is important
Passwords leak constantly in data breaches. With 2FA, even if the password is stolen, the attacker still needs the second factor (usually the phone) to access the account.
Definition
Two-Factor Authentication (2FA) is a security method that requires two different forms of verification to confirm a user identity. It usually combines something the user knows (password) with something the user has (phone).
SMS 2FA vs. authenticator apps
Authenticator apps are secure but require installation and setup. SMS is universal, works on any phone, and offers lower friction for less technical users. Many companies use SMS as the primary or fallback second factor.
How to implement SMS 2FA
After password login, generate an OTP in your backend, send it by SMS via API, and ask the user to type it. Validate the code, create the session, and discard the OTP. SMSGo delivers the code with low latency and provides status webhooks.
Frequently asked questions
Is SMS 2FA secure?
Yes, and much safer than password alone. For advanced threats, combine it with authenticator apps or hardware keys, but SMS is the most inclusive choice.
Does every user need a smartphone?
No. SMS works on basic phones, making SMS 2FA accessible to almost everyone in Brazil.
Does SMSGo offer a ready-made 2FA flow?
We provide the SMS sending API and delivery webhooks. The code generation and validation flow stays in your backend, giving you full control.
How much does it cost?
You pay only for SMS sent, starting at R$0.075 each.
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