Blockify vs Cordon vs Blocky: Shopify Blockers Compared

TL;DR: Blockify, Blocky, and Cordon all block unwanted traffic on Shopify, but they are not built the same way. Blockify and Blocky are established, popular apps built around country and IP blocking backed by IP lists. Cordon makes a live detection decision per visit using commercial VPN, proxy, and datacenter data, verifies crawlers instead of trusting user-agents, and hashes every IP it logs. For a simple country block, any of the three works; if proxies and scrapers are costing you money, detection quality decides it.

Search the Shopify App Store for a country blocker and Blockify and Blocky appear near the top. Both are established apps with large install bases. Cordon is the newer entrant, so a fair question is: what actually differs, and does it matter for your store?

Feature checklists are a bad way to answer that, because every app in this category claims country blocking, VPN detection, and bot protection. The real differences live in how each capability is implemented, so this comparison uses seven evaluation criteria you can apply to any traffic-blocking app. Where I describe Blockify and Blocky, I go by their public App Store positioning as of July 2026. I build Cordon, so read those sections accordingly and verify the claims on a trial.

1. Detection quality: IP lists vs live data

This is the criterion that separates the category. There are two ways to decide whether an IP belongs to a VPN, proxy, or datacenter. The first is the IP-list approach: maintain a database of known VPN and proxy addresses and check visitors against it. Based on their public positioning, this is how Blockify and Blocky work, along with most of the category. It is cheap, fast, and fine for datacenter VPNs whose ranges rarely change. The second is live detection: query a commercial fraud dataset at request time, continuously updated from real-world signals. This is what Cordon does for VPN, proxy, and Tor detection.

The gap shows up with residential proxies, which route bot traffic through thousands of real home connections, each used for minutes before rotating. By the time an address lands on a static list, the proxy network has moved on. Scraper operators pay for residential proxies precisely because they defeat list-based blockers. The mechanics are in how scrapers steal your product catalog.

2. Where the blocking happens

Ask any blocker vendor one question: does the block decision happen before or after the page renders?

Most Shopify blocking apps work through JavaScript that runs after the page loads. The visitor receives your full HTML, product data, and prices, and then a script decides whether to show a block screen. For a human, that is usually good enough. For a scraper, it is useless: the data already arrived in the initial response, and a bot that never executes JavaScript never sees the block.

Cordon makes a sub-50ms detection decision and, on the Plus plan, moves enforcement to a Cloudflare edge worker so the decision happens before your page is served. If the detection service ever hiccups, Cordon fails open: real customers shop normally. That is the correct default, because a false block costs a sale while a missed block usually costs nothing.

3. Performance cost

Every script you add to your storefront costs Lighthouse points, and Lighthouse points correlate with conversion. Check two things on any blocking app: how the script is injected and how heavy it is. Older apps in this category were built on script tags, which load render-blocking JavaScript on every page; Shopify has been pushing the ecosystem toward lighter theme app extensions instead.

Cordon is a theme app extension from day one: no script tags, a small asset, an embedded admin. The detection call resolves in under 50 milliseconds and never blocks rendering. Details are on the features page.

4. SEO safety: verified crawlers vs trusted user-agents

Here is the failure mode that quietly kills stores: a merchant enables aggressive bot blocking, the app blocks Googlebot, and organic traffic bleeds out for weeks before anyone connects the two events.

The root cause is user-agent trust. A user-agent string is a self-declared label: anyone can send Googlebot in a header. An app that decides "bot or not" from the user-agent alone gets it wrong in both directions, blocking real crawlers and admitting fake ones.

The correct approach is verification: confirm that a visitor claiming to be Googlebot actually comes from Google's published infrastructure. Cordon does this for search engines (Google, Bing) and known good bots (GPTBot, ClaudeBot, PerplexityBot, Ahrefs), and these verified crawlers are always allowed. You cannot block them even by accident, which is exactly the point. A "Googlebot" arriving from a Hetzner server is flagged as a spoofed crawler instead. Ask any vendor whether they verify crawlers or just pattern-match user-agents; the long version is in do bot blockers hurt SEO.

5. Privacy and GDPR

A visitor log full of raw IP addresses is a log full of personal data under GDPR: retention obligations, access requests, and privacy-policy questions most merchants would rather not own.

Cordon stores visitor IPs as SHA-256 hashes with a salt that rotates daily. You still see patterns in the live visitor log (repeat offenders within a day, network origin, what was blocked and why), but yesterday's hashes cannot be joined to today's, and nothing in the log identifies a person. If you sell into the EU, ask every vendor how they store IPs and for how long.

6. Scraper-specific detection

Country and VPN blocking do not stop scrapers, because commercial scrapers run from datacenters and proxies in whatever countries you allow. Catching them takes dedicated signals:

• Request velocity: humans browse a few pages per minute, scrapers hit hundreds.
• Headless browser markers: automation tools leave fingerprints normal browsers do not.
• Spoofed-crawler detection: the fake-Googlebot check from the SEO section, applied as a block signal.
• Datacenter detection: almost no real shopper browses from an AWS, Alibaba, Tencent, or Huawei Cloud server.

Cordon ships all four, plus one-rule ASN blocking to remove an entire hosting provider's address space at once. Based on their public listings, Blockify and Blocky position primarily around country, IP, and fraud filtering rather than scraper-specific detection, so if scraping is your main problem, test this specifically. See stop content scraping for how the layers combine.

7. Pricing structure

Pricing in this category varies by features and traffic, so compare plans against your actual monthly visitor count rather than the headline price. Cordon's plans are on the pricing page: a free plan with basic country and bot blocking, Starter at $9/month (10k visitors), Growth at $19/month (100k visitors, adds VPN/proxy/Tor), Pro at $49/month (5M visitors, adds datacenter and scraper detection), and Plus at $99/month (adds the Cloudflare edge worker and anti-scraping mode), with a 7-day free trial on every paid plan. For Blockify and Blocky, check their current App Store listings; quoting prices that may change would not be fair or useful.

Comparison table

Verdict: who should pick what

If you only need a country block, you have several fine options, and Blockify and Blocky both have the track record to prove they handle that use case. Cordon does it too (200+ countries, one-click flag picker, presets like "Block China"), but a simple country block alone is not a reason to switch apps.

If you are losing money to proxy fraud or scrapers, detection quality becomes the whole decision. Residential proxies evade static lists by design, and scrapers ignore JavaScript blocks by design. You need live detection data, request-level signals, and enforcement before the page is delivered. That is the case Cordon was built for; merchants seeing checkout fraud through VPNs should start with block VPN checkout fraud.

Whatever you pick, run the trial against real traffic and check three things: does the visitor log show blocked scrapers you recognize, did your Lighthouse score hold, and can you still fetch your homepage as Googlebot from Search Console. Deeper head-to-head pages: Cordon vs Blockify and Cordon vs Blocky.

Frequently asked questions

What is the best Blockify alternative for Shopify?

It depends on the problem. If you only need to hide your store from a few countries, several apps handle that fine, including Blockify and Blocky themselves. If you are losing money to residential proxies, VPN fraud, or scrapers, you need live commercial detection data instead of static IP lists, which is the case Cordon was built for.

Do Blockify and Blocky use the same detection method as Cordon?

Based on their public listings as of July 2026, both are IP-list based blockers focused on country and IP blocking with fraud filtering. Cordon queries live commercial VPN and proxy detection data per visit instead of matching a downloaded list, which matters most for residential proxies that rotate faster than lists update.

Can a traffic-blocking app hurt my Shopify SEO?

Yes, if it blocks search engine crawlers. A blocker that trusts user-agent strings fails in both directions: real Googlebot gets caught by an aggressive rule, or a scraper pretending to be Googlebot walks in untouched. Cordon verifies crawlers against their published identities and never blocks verified search engines, on any setting.

Is it GDPR-compliant to log visitor IP addresses?

IP addresses are personal data under GDPR, so storing them raw creates real obligations. Cordon stores SHA-256 hashed IPs with a daily-rotating salt, keeping the log useful for spotting patterns without holding identifiable data. Ask any vendor how they store IPs before you install.

How much do Shopify traffic-blocking apps cost?

Most apps in the category sit between free and roughly $50/month depending on features and traffic. Cordon has a free plan, paid plans from $9 to $99/month priced by visitor volume, and a 7-day free trial on every paid plan.

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To test the live-detection approach against your own traffic, install Cordon from the Shopify App Store. The free plan covers basic country and bot blocking, and every paid plan starts with a 7-day trial.