OptiMail vs Z Address Validator ‑ Smart
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 22, 2026 for OptiMail, Oct 14, 2026 for Z Address Validator.
The short answer
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Pay as you go
- · Automated UK address checks
- · Customer address self-correction
- · Dashboard and daily reports
- · Mover and goneaway detection
- · No monthly subscription
- · Pay only for positive matches
Pro plan
- · Detects special addresses
- · Editable email format
- · First 100 orders are free!
- · Free to install
- · No coding required
- · Send email alerts to recipients
Basic plan
- · First 100 orders are free!
- · Free to install
- · No coding required
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureShoppers often let their phone fill in their address at checkout, and it can be one they saved before they moved. Shopify checks the address is real. OptiMail checks your customer still lives there. Every UK order is checked for movers and goneaways as soon as it’s placed.
ZQ Address Validator, powered by UPS Address Validator and FedEx Address Validator technology, ensures accurate shipping information for all addresses worldwide. It catches typos, missing details, and incorrect data at checkout, reducing shipping errors, lost packages, and reshipment costs while improving customer satisfaction.
- Checks UK delivery addresses after checkout
- Prompts customers to review their address
- Highlights possible mover and goneaway records
- Helps reduce failed delivery and reshipping costs
- Real-time address validation enables customers to enter accurate address info
- Incorrect address entries will trigger an error alert
- Automatically suggest correct address based on input, one-click import
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 |  OptiMail |  Z Address Validator |
|---|---|---|
| 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 | OptiMail | Z Address Validator |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 1 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | OptiMail | Z Address Validator |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | No monthly plan listed | No monthly plan listed |
| Longest free trial | Not listed | Not listed |
| Plans listed | 1 | 2 |
Listing
| Measure | OptiMail | Z Address Validator |
|---|---|---|
| Shopify category rank | #445 | #300(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | May 12, 2026 | Jun 9, 2025 |
| Languages | 1 | 1 |
| Developer | BBS | ZQ TECH CONNECT INC. |
FAQ
OptiMail and Z Address Validator: common questions
- 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 22, 2026 for OptiMail, Oct 14, 2026 for Z Address Validator; 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 22, 2026 for OptiMail, Oct 14, 2026 for Z Address Validator. 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.