B2B PO Guard — Require PO vs PO Validator B2B
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026.
The short answer
- Both list a free plan. Paid plans start at $19.99/month for B2B PO Guard and $4.99/month for PO Validator B2B.
Head to head
Free
- · 1 live PO rule, up to 50 orders/mo
Pro Monthly
- · Beyond Free: deposits + review routing
Advanced Monthly
- · Beyond Pro: Plus payment hiding
Free
- · Built-in errors in EN, DE, FR, and ES
- · Required PO field enforced at checkout
Starter
- · Everything in Free
- · Minimum and maximum length validation
- · Regex patterns for ERP and SAP formats
- · Required prefix rule (e.g. "PO-")
Pro
- · 24/7 email support
- · Character rules: whitelist, no spaces
- · Custom error messages per language
- · Custom feature requests welcome
- · Everything in Starter
- · Personal onboarding session
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featurePurpose-built for what native B2B terms don't check: PO number format, prefix, regex, and uniqueness rules, previewed live before you publish. Set deposit percentage guardrails and route orders above a threshold for manual review and approval, with approver email alerts. Works alongside native Net Terms - D2C and no-company checkouts stay untouched.
B2B merchants must attach a Purchase Order number to every order, but Shopify provides no native way to enforce this. Buyers skip the PO field or enter invalid data, causing fulfillment delays and ERP mismatches. PO Validator solves this with server-side validation via Shopify Functions. Buyers cannot complete checkout without a valid PO number.
- Require and validate PO numbers with B2B checkout guardrails.
- Set deposit and Net term rules while keeping D2C checkouts unchanged.
- Route selected B2B orders for review and keep rollback proof.
- Server-side checkout validation that buyers cannot skip or bypass
- Flexible rules: length limits, required prefix, and regex for ERP formats
- Character rules: whitelist allowed characters and block unwanted spaces
- Regex rules: validate PO formats against ERP and SAP number patterns
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 |  B2B PO Guard |  PO Validator B2B |
|---|---|---|
| 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 | B2B PO Guard | PO Validator B2B |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | 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 | B2B PO Guard | PO Validator B2B |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $19.99/month | $4.99/month(ahead) |
| Longest free trial | 7 days | 7 days |
| Plans listed | 3 | 3 |
Listing
| Measure | B2B PO Guard | PO Validator B2B |
|---|---|---|
| Shopify category rank | #116 | #261 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Jun 8, 2026 | Jun 8, 2026 |
| Languages | 1 | 3 |
| Developer | momiji-shop | byKlemm |
FAQ
B2B PO Guard and PO Validator B2B: common questions
- Is B2B PO Guard or PO Validator B2B cheaper?
- Both list a free plan. Paid plans start at $19.99/month for B2B PO Guard and $4.99/month for PO Validator B2B. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- 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 13, 2026; 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 13, 2026. 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.