New · Device Intelligence is here →

Reduce SMS OTP drop-offs
by 50% at Login.

OTPless replaces SMS OTP with telecom-grade Silent Network Auth, WhatsApp zero-tap, and smart fallbacks - orchestrated through one SDK. Built for high-scale B2C apps that lose revenue every time a code doesn’t arrive.

Talk to our team → See integration demo
99%+
Login success
≤ 7s
P90 verification
100M+
Auths / month
35+
Enterprise apps
Silent Network Auth - flow
1
User selects phone number 
Or entered manually.
2
Mobile Auth picks the best channel
based on Country, device, network, history.
3
Operator silently verifies the SIM
No OTP, no tap, no app switch.
4
Auth token issued in 4s
User is logged in. You ship.
runtime · 0.0s
9:41
ACME
Sign in to continue
One tap to your account · 24×7
+91Phone number
Verifying…
Trusted by category leaders
Astrotalk
Meesho
Shiprocket
Bajaj
Physics Wallah
Navi
Ixigo
Inshorts
Classplus
KukuFm
Seekho
Snabbit
YesMadam
eloelo
Customer voices · 7 stories
"OTPless completely transformed how users log in at Meesho — fast, effortless, and frustration-free. Over 25 million seamless logins every month and a 10% boost in conversion. A game-changer for both our users and our growth."
Arjit Verma · Associate Director, Strategy & Operations · Meesho
25M+
Logins / month
+10%
Conversion lift
01 / 07
Two pillars, one platform

Verify the user. Trust the device.

Mobile Auth confirms who is logging in. Device Intelligence tells you what they're logging in from — emulators, remote control, fraud rings, all of it. Both ship behind the same SDK call.

01 Mobile Auth ↓ 02 Device Intelligence ↓
01 · Mobile Auth

One API. Every channel.
Picked in real time.

Mobile Auth picks the channel that's actually working right now — by success rate, latency, and operator health per country. No priority lists. No retry logic. Just the fastest path to a verified user.

Silent Network Auth

Cellular-network handshake. No OTP, no tap, no app switch.

Live · 38 countries
Zero-tap & auto-read

One-tap deep-link or auto-read OTP. No provider keys to manage.

Live · global
Multi-provider routing

Live A/B across 3+ providers per country. RCS upgrades the bubble where supported.

Live · global
Universal fallback

For SMS-blocked regions and accessibility-first flows. Works on every handset, every network.

Live · global
Routing engine · live request · 1 of 1
⚡ Silent Network Auth PRIMARY
↳ WhatsApp FALLBACK
↳ SMS / RCS FALLBACK
↳ Voice FALLBACK
Mobile Auth idle
// one call — every fallback handled 
await otpless.verify({
  phone: '919899038845'
})
99%+Login success
≤ 4sSNA P90
~30 minSDK integration
Explore Mobile Auth → What is SNA?
BACKGROUND AUTHENTICATION

Silent Network Auth

SNA replaces the OTP screen with a cellular handshake between your app and the user's mobile operator. The SIM is verified at the network layer in under four seconds - no OTP typed, no app switched, no friction served.

User's device
APP REQUESTS LOGIN VIA SNA
Mobile operator
CHECK IF SIM IS PRESENT IN THE DEVICE
OTPless gateway
CONFIRM AUTHENTICATION
App backend
PHONE NUMBER VERIFIED
38Countries supported
≤ 4sP90 latency
0User actions
How SNA works →
02 · Device Intelligence

Know every device.
Trust every session.

Hardened against the most sophisticated attackers. Every login carries an allow, step-up, or block verdict in under 200ms — with the reason codes that drove it. Real users never see a CAPTCHA.

◇ Emulator, root & RAT detection

Catches BlueStacks, Nox, jailbroken iOS, Magisk, Frida, AnyDesk, TeamViewer, and screen-share fraud rings.

◉ Fingerprint & app integrity

Stable cross-session ID + Play Integrity / DeviceCheck. Survives reinstalls; flags cloned apps and tampered requests.

○ SIM swap & velocity

SIM age, recent-port lookup, multi-account graphs, login velocity per device and ASN.

▨ Built-in rules engine

Risk teams write declarative rules: if emulator OR risk > 70 then block.

Risk verdict · live 142ms · 38 signals
12
/ 100 risk
Allow
Continue with primary auth.
SESSION 9C1A…F3
7 categories · 41 live signals fused per verdict
142msMedian verdict
40+Signal layers
0Extra permissions
Explore Device Intelligence → Talk to risk team
Why teams pick OTPless

Most login flows lose 15-20% of users. Ours doesn't.

01 - Conversion

Drop-off, eliminated

Silent Network Auth removes the OTP screen entirely. WhatsApp and zero-tap fallbacks recover the rest. Customers see 15-20% lift on day one.

02 - Cost

Lower SMS spend

Smart routing across providers per country, with WhatsApp and SNA reducing reliance on premium SMS. Pay less, deliver more.

03 - Security

Phishing-proof by default

SNA validates SIM possession at the network layer - no OTP to intercept, no SIM-swap surface. Device Intelligence catches what auth alone can't.

Live
Telecom-grade rails compliant with RBI & NPCI
Compliance
SOC 2 · ISO 27001 · GDPR · DPDP
Coverage
Global · 200+ markets
Platforms
iOS · Android · Web · RN · Flutter

Ship login that actually works.

Custom enterprise pricing, dedicated solutions engineering, and a 30-minute SDK integration. Tell us your auth volume and we’ll route you to the right team within 1 business day.

Talk to our team → See integration demo