$2
per user / month starting price
Zero
reusable credentials after login
1,000+
app integrations via SAML SSO
Days
not months to deploy
Why static passwords fail at scale
Passwords leak, get reused, and are harvested at massive scale — turning every breach into fuel for credential stuffing and replay attacks. Static credentials are the root cause of over 80% of enterprise breaches.
Rainbow Secure Passwordless OTP removes reliance on static credentials entirely, replacing them with one-time credentials with short validity and require human cognitive participation to complete.
-
Why Passwordless OTP Matters
Passwordless OTP removes reliance on static credentials, reducing phishing, credential theft, and reuse attacks. By combining one-time codes with human cognition and multi-channel delivery, it delivers stronger security with less friction—improving trust, usability, and adoption across modern digital platforms.
-
Passwords Create Reusable Attack Currency
Passwords leak, get reused, and are harvested at scale—turning every breach into fuel for credential stuffing and replay attacks.
-
Attackers Scale Faster Than Defenders
AI-powered bots, automation frameworks, and high-speed credential attacks exploit static secrets instantly. Identity must disrupt automation—not depend on it.
-
Legacy MFA doesn't solve the problem
SMS OTP and push approval MFA are interceptable via AiTM proxy attacks and exhaustible via MFA fatigue campaigns. Rainbow Secure's cognitive OTP eliminates both vectors: codes can't be replayed without the visual formatting context, and there are no push notifications to abuse.
From login request to verified access Rainbow Secure — in seconds
A simple four-step flow that's invisible to legitimate users and structurally impenetrable to automated attacks.
📧 OTP Delivered
A one-time code is sent via Email, SMS, App notification, or TOTP to the user's registered channel.
🎨 Cognitive Challenge
The code arrives with simple color and style formatting instructions — easily completed by the real user, unexecutable by bots.
🧠 Human Verification
The user enters the formatted code. AI monitors the session for device, location, and behavioral risk signals simultaneously.
✅ Access Granted
Session is established. The code expires immediately — unreplayable, non-transferable, and worthless to any interceptor.
Why Rainbow Secure OTP is in a class of its own
Every OTP vendor delivers a code. Only Rainbow Secure adds a cognitive layer that makes that code meaningless to anyone who intercepts it.
Color & Style OTP — impossible to automate
Every OTP delivery includes simple color and style formatting instructions. Real users complete them naturally in under two seconds. Bots, phishing kits, and replay scripts cannot correctly interpret or execute the formatting challenge within session time limits.
Even if an attacker intercepts the code via SMS hijack or email breach, they receive a string of digits with zero context for what the cognitive transformation looks like. The attack is structurally broken.
Get Quote
🤖 Bot & AI attack immunity
Automated credential stuffing and brute-force tools have no mechanism to reproduce the visual interaction dimension. The attack surface powering 90% of enterprise breaches is structurally removed.
🔍 Real-time risk monitoring
Rainbow Secure monitors every login in real time, detecting and blocking brute-force attempts, credential stuffing, phishing, and session replay activity as it happens.
🔐 No new attack surface created
No static passwords to store, rotate, or reset. No hardware tokens to lose. No push notifications to fatigue. Users authenticate smoothly while organizations remove the largest root cause of identity breaches.
Features of Rainbow Secure OTP / Passwordless Authentication
Users receive a one-time code via email or SMS.
Each OTP message includes color and style formatting guidance requiring a simple visual step—adding a cognitive verification layer that bots and automated scripts cannot mimic.
Removes password resets, lockouts, and password-based phishing exposure.
Websites, SaaS applications, WordPress, custom applications, and enterprise IAM workflows.
Codes expire quickly, are tied to device and session context, and cannot be reused.
- Simple, Fast, One-Time Codes
- Formatted OTP with Color & Style Instructions
- No Passwords to Manage
- Works Everywhere
- Phishing-Resistant Delivery
Benefits of Rainbow Secure Passwordless Authentication
Eliminate Credential-Based Vulnerabilities
Neutralizes brute-force, phishing, credential stuffing, replay, and password-guessing attacks by removing reliance on reusable static passwords.
Simplify User Login Experience
Users no longer manage complex passwords, making authentication faster and more intuitive.
Reduce IT Costs
Fewer support tickets, fewer lockouts, and lower operational overhead tied to password management.
Built for industries where a breach is catastrophic
Rainbow Secure Passwordless OTP satisfies authentication requirements across major regulatory frameworks — without manual audit overhead.
Healthcare & Life Sciences
No static passwords means no stored credential exposure. Automatic audit trails for every authentication event satisfy HIPAA technical safeguard requirements. Pairs with RBAC for minimum necessary access enforcement.
Pharma & Biopharma
OTP-based electronic signature workflows satisfy FDA 21 CFR Part 11 requirements for electronic records and signatures. Full audit trail on every authenticated event with immutable log export.
Defense & Government
Split OTP satisfies NIST 800-171 multi-factor authentication requirements. Online and offline MFA capability meets DFARS-covered environment requirements where internet connectivity cannot be assumed.
Fintech & Payments
Cognitive OTP eliminates the fraud vector of intercepted OTPs in wire transfers and privileged admin access. Step-up authentication for transaction approval without hardware tokens or SMS OTP exposure.
Enterprise SaaS
All authentication events export to SIEM platforms. Pre-built SOC 2 compliance reports generated automatically — no manual overhead for your compliance team during audit cycles.
Data Privacy
Flexible SaaS or Private Azure hosting options provide full data residency control. No third-party credential storage. Log retention controls meet regional data privacy requirements.
Rainbow Secure OTP vs. Passkeys vs. Legacy SMS OTP
Passkeys are an improvement over passwords — but they don’t eliminate all attack vectors. Here’s how the approaches compare.
| Capability | SMS OTP (Legacy) | Rainbow Secure OTP ✦ | FIDO2 Passkeys |
|---|---|---|---|
| No static password required | ✓ Yes | ✓ Yes | ✓ Yes |
| SIM swap / SS7 attack resistance | ✕ Vulnerable | ✓ Cognitive layer blocks replay | ✓ Device-bound |
| AiTM phishing proxy resistance | ✕ Interceptable | ✓ Cognitive binding blocks replay | ⚠ Origin-bound only |
| Post-authentication session protection | ✕ None | ✓ AI ITDR monitors session | ✕ Not covered |
| Works without device enrollment | ✓ Yes | ✓ Yes | ✕ Requires enrolled device |
| Works offline / air-gapped environments | ✕ No | ✓ Offline TOTP available | ⚠ Device only, no server |
| Split OTP for high-assurance workflows | ✕ No | ✓ Native capability | ✕ No |
| No hardware token required | ✓ Yes | ✓ Yes | ⚠ Depends on implementation |
| HIPAA / 21 CFR / NIST 800-171 ready | ⚠ Partial | ✓ Full compliance support | ⚠ Partial |
