Silent Network Auth
SIM verified · no OTP sent · Airtel
340ms
Device Intelligence
Priya's iPhone · returning · clean
Trust 94
UPI SIM Binding
₹2,499 · ICICI ••5821 · SIM verified
Authorised
Address Auto-fill
Priya Sharma · Noida 201301
1 tap
120M+
Authentications per month
10–20%
Conversion uplift
<4s
Median time to verified
230+
Operators supported
Powering identity for India's hyperscale apps
Bajaj Markets
Meesho
Navi
ixigo
OLX
Classplus
Inshorts
Astrotalk
Dashverse
Textbook
Kuku FM
Seekho
Snabbit
EloElo
Story TV
Frnd
The Journey

One user. Every checkpoint.

From the first tap to every transaction, OTPless handles identity invisibly - without an OTP in sight.

01
Trust Layer
First open
Risk-scored before a pixel renders. Returning user? Instant trust.
12ms
02
Auth Layer
Sign up
SIM-verified through the carrier. No OTP box ever shown.
340ms
03
Context Layer
Checkout
6 form fields completed from the SIM. Friction gone at peak intent.
1 tap
04
Auth Layer
Payment
SIM binding via SNA authorises the payment. Zero codes. Zero fraud.
0 OTPs
05
Context Layer
Recovery
SIM-matched recovery. No SMS, no reset link, no support ticket.
SIM
Use Cases

Built for the moments that move metrics.

Real-world identity stacks running in production, across India's category leaders.

Fintech
SIM-bound auth, end to end.
Silent Network Auth verifies the SIM presence in the device at every checkpoint without any permission. Device Intelligence scores risk in parallel. The whole funnel becomes one trusted thread which makes account takeover difficult for the fraudster.
+20%
Conversion uplift
E-commerce
Checkout that completes itself.
Address auto-fill populates name and address, and Mobile Auth intelligent router verifies the phone number instantly. No typing. Single click checkout.
+10%
Checkout conversion
Streaming
Sign-in that earns the subscription.
Silent Network Auth for first, WhatsApp or SMS Auth for fallback, Device Intelligence for trust. Friction at the paywall disappears - paid subscriber goes up.
+5%
Paid subscription lift
Edtech
One tap. Right back in class.
Auto-login holds the session. SNA re-verifies in the background when it session expires. Students focus on learning, not on the login screen.
40%
AUTO LOGIN
Auto-login SNA
→ Classplus
Silent Network Auth

In a blink. Zero-tap silent auth.

SNA verifies SIM possession in the background by talking directly to the carrier. No OTP screen. No SMS to fetch. No "didn't receive a code" panic. The user does nothing — and they're authenticated.

~2s · 0 user taps · How SNA works →
9:41
S snabbit
STEP 1 OF 2

Enter your
mobile number

MOBILE NUMBER
🇮🇳 +91 ▾ 98765 43210
SIM detected · Airtel · 4G
S snabbit
STEP 1 OF 2

Enter your
mobile number

MOBILE NUMBER
🇮🇳 +91 ▾ 98765 43210
AIRTEL · 4G
Verifying with Airtel
No code needed — confirming on the network
Hi, Aisha
Mumbai · Bandra West
A
Signed in via your SIM
🧹
Cleaning
🛠️
Repair
💇
Salon
🍳
Cook
Book a service
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.

99%+ login success · Explore Mobile Auth →
ROUTING ENGINE · LIVE SCENARIO 1 / 4 · SNA SUCCESS
  • Silent Network Auth
  • WhatsApp
  • SMS / RCS
  • Voice
EVALUATING…
// one call — every fallback handled
await otpless.verify({
  phone: '919899038845'
})
Device Intelligence

Verify the user. Trust the device.

Mobile Auth confirms who is logging in. Device Intelligence tells you what they're logging in from — every login carries an allow, step-up, or block verdict, scored in under 200ms.

142ms · 40+ signals fused · Explore Device Intelligence →
Risk verdict · live 142ms · >40 signals fused
Verdict
Allow
trusted_device · consistent_ip · clean_history
8
/ 100 risk
Emulator detectedBlueStacks / Nox / Magisk
SIM swap < 7 daysCarrier port lookup
VPN / datacenter IPASN reputation
Multi-account velocity12 phones · same fingerprint
Impossible travelMumbai → Lagos in 14m
Tap signals → watch the verdict shift.
Customer Outcomes

The numbers our customers ship with.

* Metrics measured against pre-OTPless baselines.

24h
To go live
"From talks to go live in 24 hours. We evaluated multiple vendors before going with OTPless - 4–5% higher success rates compared to others, which at our scale is significant. Their team was in our office throughout integration. Support was instant."
PP
Prashant Pandey
Engineering Manager · Navi
25M+
Logins / month
"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."
Arjit Verma · Associate Director · Meesho
94.1%
Login success
Ankit Bhatia
Product Head · Seekho
6M+
Logins / month
Vishesh Upparamani
PM · Classplus
98%+
Login success
"Astrotalk partnered with OTPless to simplify login, reduce operational complexity, and support international scale. Zero-touch flows and intelligent routing delivered measurable impact on conversion, cost, and experience."
Siddharth Singh
CTO · Astrotalk
20×
Lower intl. cost
"OTPless made login effortless for our users and simpler for our team. WhatsApp zero-tap and smart fallback boosted conversions and cut our international auth costs by 20×."
Sagar Gaonkar · CTO · EloElo
↑2×
Security posture
Lirico Nurcahyadi
Head of Tech · OLX Indonesia
Lower
SMS spend
Mudit Yadav
PM · Pickrr (Shiprocket)
Integration

One call. Every channel routed for you.

The platform decides the channel by operator health, country, and device — so your code stays the same wherever it ships.

SignInActivity.kt android · kotlin
import com.otpless.main.OtplessManager
import com.otpless.dto.HeadlessRequest
import com.otpless.dto.HeadlessResponse

// 1. Init the OTPLESS view in your sign-in activity
private val otplessView = OtplessManager
    .getInstance().getOtplessView(this)

// 2. Build the verify request — just a phone number
val request = HeadlessRequest()
request.setPhoneNumber("91", "7069914791")

// 3. Start headless auth — SDK picks the best channel
otplessView.startHeadless(request, ::onHeadlessCallback)

private fun onHeadlessCallback(res: HeadlessResponse) {
    if (res.statusCode == 200 &&
        res.responseType == "ONETAP") {
        val token = res.response.optString("token")
        // → verify token on your backend
    }
}
// build.gradle  implementation 'io.github.otpless-tech:otpless-android-sdk:2.5.3'
onHeadlessCallback · ONETAP
340ms
auths[0] · primary
channelSILENT_AUTH
statusSUCCESS
identityValue917069914791
verifiedAt1778612141195
phoneDetail
operatorJIO
homeOperatorVI
countryIN · +91
portedtrue
deviceFingerprinting.riskAssessment
Session risk HIGH · 95 / 100
⚠ isAppTampered ⚠ debuggingEnabled
device: iQOO I2410 · Android 16 asn: Bharti Airtel · Haryana
SOC 2 Type II
Audited annually
ISO 27001
ISMS certified
GDPR
EU & UK compliant
DPDP Act
India compliant
Frequently asked

Common questions.

What is OTPless?
OTPless is an identity and trust layer for mobile apps. One SDK runs every identity moment — authentication, device intelligence, address pre-fill, payment authorisation and fraud signals — without sending one-time passwords.
How is OTPless different from SMS OTP?
Instead of sending a code, OTPless verifies a user’s SIM directly with their carrier using Silent Network Authentication, and falls back across WhatsApp, SMS and Voice automatically. Verification typically completes in under four seconds with 99%+ login success.
Which platforms does OTPless support?
iOS, Android, Web, React Native, Flutter and a server-side API — all from a single integration that takes around 30 minutes.
Is OTPless compliant and secure?
OTPless is SOC 2 Type II and ISO 27001 certified and supports GDPR and India’s DPDP Act. Network-layer verification makes it resistant to SIM-swap, OTP phishing and credential stuffing.
Start with OTPless

Ready to ship the identity layer your product deserves?

Book 30 minutes — we'll show you SNA on your number and ship a working integration before the call ends.

SOC 2 · ISO 27001 · 500M+ events / quarter