Cybersecurity for payments: Global Protection for
Fintechs, Online Stores, Platforms, SaaS & Apps, Stablecoins, Banks & BaaS, PayFacs & MoR
in real time.
The protection layer on the payer's screen. The payment request is verified in the instant, and any attack or alteration is blocked without affecting your transactions.
The problem is in the news
The blind spot
Your infrastructure is secure. The screen where your customer pays is not.
The attack doesn’t break into your server or pass through your fraud screening. It changes the payment after the page reaches the buyer’s browser: it swaps the QR code, copies the card, alters the payment details. To you and to your customer, the screen looks identical.
Credit card · $59.90
- Fields
- Number, expiry and CVV
- Data sent to
- payments.yourgateway.com
- Scripts on the page
- 4 authorized
- Amount
- $59.90
Proteside checks
Blocked:
card data sent to an unauthorized domain.
The legitimate payment goes through
Credit card · $59.90
- Fields
- Number, expiry and CVV
- Data sent to
- + cdn-metrics.app
- Scripts on the page
- 5, one unknown
- Amount
- $59.90
Your server is intact, your fraud screening approves and your gateway processes as usual. The diversion happens between what you issued and what the customer confirms, the one stretch none of them can see. That is where Proteside works.
See how the check worksHow it works
Four layers between the scam and your payment
A single installation on your payment page. No need to switch providers, no friction for genuine buyers.
- 1
Record
Proteside learns what’s legitimate on your page: the QR code and payment key you issued, the form fields, the authorized scripts and where data is allowed to go.
- 2
Check
In the payer’s browser, on every payment, it compares what’s on screen, and what gets copied, with what you issued.
- 3
Block
If anything doesn’t match, the swap is blocked before the payment is confirmed. Legitimate payments go through as usual.
- 4
Prove
Every attempt becomes an alert and an auditable record, the same trail that demonstrates PCI DSS requirements 6.4.3 and 11.6.1.
Use cases
The moment of payment is the same. Your business isn’t.
Pick your profile to see how Proteside fits your business, and the right way to get started.
- I run an online storeOnline storesProtect your store’s checkout in minutes, with a free trial.See solution
- I run a large businessEnterpriseMultiple brands, domains and countries under one protection.See solution
- I run an e-commerce platformE-commerce platformsOne integration protects the checkout of every merchant you host.See solution
- I’m a PSP, gateway or payment facilitatorPayment providersProtect the payment screen for your entire merchant portfolio.See solution
- I’m a Merchant of RecordMerchant of RecordProtect the checkout you run on behalf of every seller.See solution
- I run a fintechFintechsLock down the screen where money changes hands.See solution
- I run a bank or BaaS platformBanks & BaaSOne layer for your bank and for every client on your infrastructure.See solution
- I run a SaaS with paymentsVertical SaaSProtect the payments that run inside your product.See solution
- I need to meet PCI DSSPCI DSS complianceClose out 6.4.3 and 11.6.1 with automatic evidence.See solution
Case study
Already protecting the moment of payment
We serve more than 270 merchants in 69 countries. An attack on the payment screen of any one of them becomes everyone’s problem. Proteside blocks these attacks before the payment is diverted, and our customers feel that security. In the payments industry, trust is everything.
Thomas RileyCISO ·Tokeflow.com 
- Payment Orchestrator
50+ protected payment methods
One layer for every payment method in the world, on your page
Each payment method has its own typical scam: a swapped QR code, a fake form, a tampered payment code, a replaced wallet address. The check is the same for all of them, from the corner shop to an instant payment on another continent.
- Boleto
BTC (Bitcoin)
USDT (Tether USDT)
ETH (Ethereum)
USDC (USD Coin)
SOL (Solana)
PYUSD (PayPal USD)
BNB
USDS (Sky USDS)
XRP
DAI
TRX (TRON)
USDe (Ethena USDe)
POL (Polygon)
FDUSD (First Digital USD)
LTC (Litecoin)
EURC (Circle EURC)
ADA (Cardano)
USDG (Global Dollar)
AVAX (Avalanche)
GRAM (Gram)
DOGE (Dogecoin)
Comparison
Protecting scripts is just the starting point.
Proteside goes further and protects the payment.
Payment page security tools take care of scripts and PCI DSS. Proteside does that and goes further: it compares the QR code, the payment code and the wallet address shown on screen with what your server issued.
| Proteside | Feroot | c/side | Jscrambler | |
|---|---|---|---|---|
| Script inventory and authorization (PCI DSS 6.4.3) | Offers | Offers | Offers | Offers |
| Detects changes (PCI DSS 11.6.1) | Offers | Offers | Offers | Offers |
| Blocks malicious scripts in the browser | Offers | Offers | Offers | Offers |
| Checks that the Pix QR code and copy-paste code on screen are the ones your server issued | Offers | Not in public information | Not in public information | Not in public information |
| Checks the boleto (Brazilian bank slip) line before payment | Offers | Not in public information | Not in public information | Not in public information |
| Checks instant-payment QR codes worldwide (UPI, PromptPay, DuitNow, PayNow, QR Ph, FPS, CoDi) | Offers | Not in public information | Not in public information | Not in public information |
| Checks the crypto wallet address shown and copied by the customer | Offers | Not in public information | Partially | Not in public information |
- Offers
- Partially
- Not in public information
Comparison based on each vendor’s public website and documentation, reviewed in October 2026. Brand names belong to their respective owners.
Compliance
The same layer that blocks the attack produces the evidence your auditor asks for
Since March 31, 2025, PCI DSS has required an inventory and authorization of every script on the payment page (6.4.3) and detection of unauthorized changes (11.6.1). Proteside delivers both as a by-product of protection.
6.4.3: scripts under control
Automatic inventory, authorization with a written justification and a change history for every script.
11.6.1: tampering detected
Continuous monitoring of the payment page with real-time alerts, far beyond the weekly minimum.
Audit-ready evidence
An exportable report for your QSA, acquirer and financial partners. No spreadsheets, no screenshots.
Frequently asked questions
What is Proteside?
Proteside is a cybersecurity layer for the moment of online payment. In the payer’s browser, it checks that the payment details on screen (card form, QR code and payment key, boleto payment code, wallet address or instant-payment QR code) are exactly what the seller issued, and it blocks any swap before the payment is confirmed.
Which payment methods does Proteside protect?
Pix, credit cards, debit cards, boleto, stablecoins and other cryptocurrencies, digital wallets and payment links, plus instant payments in other countries: UPI (India), PayNow/SGQR (Singapore), DuitNow (Malaysia), PromptPay (Thailand), QR Ph (Philippines), FPS (Hong Kong), CoDi (Mexico) and Transferencias 3.0 (Argentina). One installation covers every method shown on the page.
Is Proteside a fraud prevention tool?
No. Fraud prevention assesses whether the buyer can be trusted. Proteside makes sure the payment page hasn’t been tampered with and that a legitimate buyer’s money goes to the right place. The two layers complement each other.
Do I need to change my gateway, payment provider or platform?
No. Proteside works on top of what you already use: any e-commerce platform, custom checkout, payment link or web application.
Does Proteside slow down checkout or block legitimate sales?
No. Checks run in the background and only step in when what’s on screen doesn’t match what was issued. Genuine buyers notice no difference.
Does Proteside help with PCI DSS?
Yes. It automatically produces evidence for requirements 6.4.3 (inventory and authorization of payment page scripts) and 11.6.1 (detection of unauthorized changes), in a format ready for your QSA and acquirer.
How much does Proteside cost?
The Store and Business plans have public pricing based on checkout pageview volume, with a 14-day free trial, and are listed on the pricing page. Enterprise businesses, platforms, payment providers and partners buy by volume or per active store, with a tailored proposal.
Does Proteside collect buyers’ personal data?
Not to check integrity. The check compares the payment details on screen with those that were issued, without storing card numbers or sensitive buyer data. Data handling follows Brazil’s data protection law (LGPD), with privacy by design.
Before your next payment, check who’s protecting your customer’s screen
Choose the path that fits your business: start a free trial for your store or book a demo built on your real payment flow.