Protect your store.
Perfect your checkout.
From the first visit to the final click on “Place order”, Blockly keeps your store safe and your checkout working for you: fraud and bots blocked and checkout rules that fit your business.
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1Small leaks, big losses
Most stores lose money in two quiet places. Each of our apps fixes one of them, properly.
Fraud eats your margin
Chargebacks, bots and fake orders cost far more than the order value — fees, lost stock and a damaged merchant account.
Solved by Blockly Fraud Filter
Checkout leaks revenue
Wrong shipping options, risky COD orders and a checkout with no upsells or trust signals quietly lower your conversion.
Solved by Blockly Checkout CustomizerSoonOne shield. Three layers of protection.
- 01Scan
Every visit, inspected
IP, country, ISP, VPN, proxy, Tor and bot signals are checked in milliseconds — before a visitor ever reaches your products.
- 02Block
Threats bounce off
Risky traffic is stopped at the edge, and fraud orders are scored and auto-cancelled — all built on Shopify Functions.
- 03Protect
Checkout stays clean
Real customers glide through a checkout tuned with your own rules, upsells and trust signals. No theme edits.
One team. Every app you need around checkout.
Free to start, built natively on Shopify, and supported by the people who wrote them.
Blockly — Fraud Filter
Block IP, country, VPN/proxy, Tor, bots and fraud orders — built with Shopify Functions.
- Block by IP, country, ISP & referrer
- VPN / Proxy / Tor detection
- AI fraud-order scoring & auto-cancel
- Checkout-level blocking (email, phone, address)
Blockly — Checkout Customizer
Validate orders, customize shipping & payment methods, add checkout components and track conversion — no code.
- Checkout validation rules (email, phone, ZIP, cart…)
- Hide, rename & reorder shipping and payment methods
- Upsells, trust badges, banners & custom fields
- Checkout funnel analytics & estimated tax
Native to Shopify, from checkout to Flow
No theme edits, no scripts injected into checkout. Our apps run on Shopify Functions and Checkout Extensibility, and work with every payment method your customers already use — from Shop Pay and PayPal to Apple Pay, Google Pay and Klarna.
Shopify FunctionsShopify Plus
Shopify Flow
Shop Pay
PayPal
Apple Pay
Google Pay
KlarnaLoved by Shopify merchants
From first-time founders to high-volume brands, merchants use our apps to stop losses and sell with confidence.
Blockly dropped my chargeback rate to almost zero. The AI filter catches things I never would have spotted.
I blocked two countries in 30 seconds — haven't had a fraudulent order from those regions since. Best free Shopify app.
The VPN detection is next-level. We sell digital products and were getting hammered by fraudsters. Blockly stopped it immediately.
Frequently asked questions
Everything you need to know about choosing, installing and running our apps.
Use Blockly Fraud Filter to block fraud, bots, VPNs and risky orders. Use Blockly Checkout Customizer to add validation rules, customize shipping and payment methods, and add checkout components like upsells and trust badges.
Every app can be installed for free. Blockly Fraud Filter has a fully functional free plan with optional paid tiers; see the pricing page for details.
Yes. They are built by the same team on Shopify Functions and Checkout Extensibility, so they run side by side without conflicts or theme edits.
No. Rules run server-side on Shopify infrastructure via Shopify Functions, and checkout components use native checkout UI extensions.
Yes. Blockly was formerly known as Shieldy. Blockly Fraud Filter is the same app that was listed as Shieldy on the Shopify App Store — same team, same features, new name.
Most features work on every Shopify plan. Some checkout UI components (for example on the information and shipping steps) require Shopify Plus — this is a Shopify platform limitation.
Start free today.
Grow with every order.
Pick the app you need, install in minutes, and upgrade only when it pays for itself.
- Free plans
- No code
- Built for Shopify