Blox: Block Customer Blacklist vs Checkout Defense: Fake Emails
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 27, 2026 for Blox, Nov 4, 2026 for Checkout Defense.
The short answer
- Both list a free plan. Paid plans start at $19/month for Blox and $15/month for Checkout Defense.
- Blox lists 14 features Checkout Defense’s listing doesn’t mention, including Auto-cancel, Bots, Chargeback analytics.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · Block or hold orders from any customer
- · Cluster customers with multiple accounts
- · Community blocklist auto-protection
- · Discover your worst customers
- · For stores under 100 orders per month
- · Past chargebacks imported automatically
Standard
- · Block or hold orders from any customer
- · Cluster customers with multiple accounts
- · Community blocklist auto-protection
- · Discover your worst customers
- · Past chargebacks imported automatically
- · Stop fraud before fulfillment
Growth
- · Block or hold orders from any customer
- · Cluster customers with multiple accounts
- · Community blocklist auto-protection
- · Discover your worst customers
- · Past chargebacks imported automatically
- · Stop fraud before fulfillment
Unlimited
- · Block or hold orders from any customer
- · Cluster customers with multiple accounts
- · Community blocklist auto-protection
- · Discover your worst customers
- · Past chargebacks imported automatically
- · Stop fraud before fulfillment
Free
- · Logs every order it would block
- · Upgrade to turn blocking on
- · Watch mode for fake checkout emails
Checkout Defense
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureBlox stops repeat chargebacks, refund abuse, and serial returners before they place another order. On install, Blox imports your order and chargeback history automatically, so customers with past chargebacks are identified from day one. Customers using multiple emails or accounts are merged into one profile. When one merchant flags a fraudster, the community-powered blocklist protects every Blox store.
Cut fake orders and promo abuse from disposable email addresses. Checkout Defense checks the email at checkout and signup against a list of 7,500+ disposable domains, refreshed weekly and checked inside the app with no third-party service. Turn each checkpoint on or off, add allow or block domains, and tag risky signups for review.
- Block or hold orders from bad customers you've already identified.
- Discover bad customers that you didn't even know existed.
- Auto group customers with multiple accounts (e.g. different emails).
- Easily block any customer without needing complex fraud rules.
- Block burner emails at checkout — cut fake orders and chargebacks.
- Stop promo and discount abuse — one burner can't burn an offer 50 times.
- Tag risky signups and newsletter subscribers automatically for review.
- 7,500+ disposable domains, refreshed weekly — checks run locally.
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Blox |  Checkout Defense |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Blox | Checkout Defense |
|---|---|---|
| App Store rating | 4.7 ★ | Not published |
| App Store reviews | 22 | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Blox | Checkout Defense |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $19/month | $15/month(ahead) |
| Longest free trial | 30 days | 7 days |
| Plans listed | 4 | 2 |
Listing
| Measure | Blox | Checkout Defense |
|---|---|---|
| Shopify category rank | #27 | Not enough data |
| Shopify App Charts | #10 on Pricing moves in Fraud | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Feb 24, 2025 | Jun 26, 2026 |
| Languages | 1 | 1 |
| Developer | Blox | TrackbackLabs |
FAQ
Blox and Checkout Defense: common questions
- Is Blox or Checkout Defense cheaper?
- Both list a free plan. Paid plans start at $19/month for Blox and $15/month for Checkout Defense. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Blox lists 14 the others don’t mention, such as Auto-cancel, Bots, Chargeback analytics, Chargebacks. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 27, 2026 for Blox, Nov 4, 2026 for Checkout Defense; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 27, 2026 for Blox, Nov 4, 2026 for Checkout Defense. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.