SMS Fraud Prevention
Stop SMS pumping.
Protect verification spend.
Automated verification requests can turn OTP delivery into avoidable SMS costs. ShieldLabs detects browser bots, masked visits and linked accounts before your product sends a code.
Start FreeVerify your account
Request a one-time code.
Browser automationProxy
Protect SMS spend
Spot risky verification requests before another message is sent.
Detect automated requests
Identify browser bots and masking around OTP flows.
Link repeat requesters
Connect requests to returning visitors and related accounts.
Keep real signups moving
Reserve verification capacity for genuine users.
Before an SMS is sent
Spot automated OTP requests.
Protect verification spend.
ShieldLabs detects browser automation and masking at the request form. Check the visitor risk result before sending another code through your SMS provider.
Web journey
Visitor requests an SMS code
Repeat verification activity
Link repeated requests.
Keep codes for real users.
Visitor identification and multi-accounting detection expose repeat requesters across sessions and accounts. Combine them with your send counts and completion records to keep OTP requests under control.
Web journey
Another account requests an SMS code
Protect signup and login
Check browser risk at either point where an OTP can be requested.
Use location context
Compare IP location and masking signals with the regions your product serves.
Keep your SMS provider controls
Pair visitor evidence with phone-number, carrier and delivery checks from your messaging stack.
The ShieldLabs platform
More than a phone number.
The visitor requesting the code.
Evaluate the web visitor with identification, bot detection, device and network intelligence, named risk signals and scoring before your SMS provider receives the verification request.
Enterprise-level functionality. Without enterprise pricing.
Accurate identification
Recognize returning visitors even when they clear cookies, use incognito mode or change their IP address. Detect linked users with different email addresses.
Identification accuracy
High-Risk Event detection
Detect account abuse out of the box by automatically identifying linked users. No fraud model training is required.
Risk signals
Get ready-made detections of automation, masking and spoofing, with named risk signals behind each result.
Bot & AI traffic detection
Detect bots, scripts and browser automation. Separate useful bot and AI traffic from abusive activity.
Risk scoring
Score every visit from 0 to 100 and classify it as trusted, suspicious or dangerous. See the signals behind each score.
Device fingerprinting
Recognize devices by their fingerprints. Identify the browser, operating system and device type. Detect headless browsers and tampering.
IP & Network Intelligence
Reveal the real IP address and geolocation behind masking. Detect VPNs, proxies and private relays.
203.0.113.42198.51.100.23Traffic quality scoring and risk analytics
Get one score for all your traffic and ready-made quality results by source, channel, referrer and UTM campaign.
Analytics dashboard
Investigate risky requests.
Understand the traffic behind them.
See identified visitors, linked accounts, bot detections, risk scores and traffic sources around verification journeys. Match those results to send and completion records in your product.
How it works
Start protecting your product.
Connect once and start receiving ready-made fraud and abuse detections.
- 01
Add the snippet or SDK
Connect your product and start identifying visitors and users.
- 02
Receive ready-made detections
Get detected fraud and account abuse in the dashboard or through API integrations.
- 03
Prevent fraud and abuse
Protect customer accounts, paid access and signup incentives in your product.
Developers
Integrate in
5 minutes.
A single API to identify, detect and score. Receive risk data through API responses and webhooks. Integrate selected data points into your business logic to prevent fraud and abuse.
Protect your users and product
Make abuse visible.
Keep genuine users moving.
Start Free FAQ
Understand the evidence.
Put it to work.
What is SMS pumping fraud?
SMS pumping is the artificial generation of verification or messaging requests that creates unnecessary SMS traffic and costs. It often starts at a public signup or OTP request form.
How does ShieldLabs help prevent SMS pumping?
ShieldLabs detects browser automation, masked connections and returning activity at the web request. Use the risk result before instructing your SMS provider to send a code.
Does ShieldLabs score phone numbers or carrier routes?
No. ShieldLabs provides visitor, device, network and bot evidence. Phone-number reputation, destination risk, delivery and carrier controls belong to your SMS provider or other tools.
Can this help with repeated OTP requests from one visitor?
Yes. Visitor identification adds context across sessions. Your product supplies request counts and verification outcomes, then uses that context to enforce send limits.
Can related accounts request codes from the same visitor?
Yes. Multi-accounting detection can expose linked accounts behind repeated verification requests. Your product retains the phone numbers, send history and verification outcomes.