OTP vs Password: Which is Safer in 2026?
OTP and password compared as authentication factors: phishing risk, brute force, sharing, regulatory positioning. Why the answer is "use both" for high-stakes flows.
StartMessaging Team
Updated
The wrong question. Passwords and OTPs defend different things. The right question is which to use for which step.
Overview
- Password — knowledge factor; vulnerable to leaks, reuse, phishing.
- OTP — possession factor; vulnerable to SIM swap, real-time phishing.
- Combined — covers both attack categories.
Side-by-Side Comparison
| Password | OTP | |
|---|---|---|
| Phishing | Vulnerable | Vulnerable to RT proxy |
| Reuse risk | High | None (single use) |
| Memorability | Low | N/A |
| Cost | Free | Rs 0.25 / send |
| SIM swap | Not affected | Compromised |
Why “Use Both” Wins
Password + OTP = 2FA. The attacker must compromise two independent attack surfaces. Read our 2FA explainer.
India Context
- RBI AFA effectively requires the second factor.
- Most consumer apps use phone-OTP only (no password) for ease.
- Banking and SEBI-regulated apps use password + OTP.
FAQ
Pick the combination that fits the value of the action: OTP-only for casual logins, password + OTP for sensitive flows.
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StartMessaging Team
StartMessaging Team