Block bad addresses in checkout, no Plus required.
Address Verifier hard-blocks rule violations in checkout on any Shopify plan, verifies deliverability at $0.04 an order, and has a free plan for the rules. Here's how it compares with Clearer.io's Address Validator, line by line.
Honest, sourced, and dated. Clearer.io details current as of June 2026.
Address Verifier and Clearer.io's Address Validator both flag undeliverable Shopify addresses. What differs: carrier verification is $0.04 per order versus $0.06, a free plan handles rule-based blocking (PO boxes, missing house numbers) that Clearer.io has no equivalent for, and those rules hard-block in checkout on any plan, where Clearer.io's in-checkout prompt needs Shopify Plus. Clearer.io serves merchants in 27 countries and has the longer track record.
Both apps do the same core job: stop a shipping address that can’t be delivered before it costs you a reship. The differences come down to price, what you get for free, and what happens before the order is placed.
On any Shopify plan, Address Verifier hard-blocks the rule violations you care about, like PO boxes and missing house numbers, right in checkout. It runs as a Shopify validation function, so the order can’t be placed with a flagged address in the first place. The deeper carrier check confirms an address is deliverable, not just well-formatted, and suggests the corrected version. That one runs after purchase on the Thank-You page, or in checkout if you’re on Shopify Plus. Clearer.io works the same way on Plus, but on a standard plan it gates the in-checkout prompt off, so its checks wait until after the order is placed.
On price, carrier verification is $0.04 per order versus $0.06, and both apps give you the first 100 free. The other gap is the free tier. Address Verifier’s rule-based blocking costs nothing, forever, so you can stop PO boxes without paying a cent. Worth being precise, though: the free plan covers the rules, not the carrier verification. That deeper check is the Pro plan, at $0.04 per order with the first 100 orders free. Clearer.io has no rules-only free tier at all.
None of that makes Clearer.io a weak app. It’s mature, well-supported, and serves merchants in 27 countries, where Address Verifier is built for merchants in the US, Canada, the UK, Australia, and New Zealand. If you sell from outside those five, Clearer.io may be your only option of the two. For merchants in those markets who want cheaper verification, a free way to block bad addresses, and in-checkout blocking on any plan, Address Verifier is the more direct fit.
Address Verifier vs Clearer.io, line by line.
| Address Verifier | Clearer.io Address Validator | |
|---|---|---|
| Price per verified order | $0.04, first 100 orders free | $0.06, first 100 orders free |
| Free plan | Free forever for rule-based blocking (no carrier verification) | Free to install, then usage-priced after 100 orders; no rules-only free tier |
| Block rule violations in checkout | Every plan, before the order is placed, via Shopify's validation function | In-checkout prompt needs Shopify Plus; standard plans check after purchase |
| Where verification runs | Post-purchase on any plan; in checkout on Shopify Plus | Post-purchase on any plan; in checkout on Shopify Plus |
| Available to | US, Canada, UK, Australia and New Zealand merchants | Merchants in 27 countries |
Price per verified order
$0.04, first 100 orders free
$0.06, first 100 orders free
Free plan
Free forever for rule-based blocking (no carrier verification)
Free to install, then usage-priced after 100 orders; no rules-only free tier
Block rule violations in checkout
Every plan, before the order is placed, via Shopify's validation function
In-checkout prompt needs Shopify Plus; standard plans check after purchase
Where verification runs
Post-purchase on any plan; in checkout on Shopify Plus
Post-purchase on any plan; in checkout on Shopify Plus
Available to
US, Canada, UK, Australia and New Zealand merchants
Merchants in 27 countries
The reasons merchants switch.
A third less per order
Carrier verification is $0.04 per verified order versus $0.06, and both apps give you the first 100 free. You're charged once per order, however many times the address is re-checked.
A free plan for the rules
Rule-based blocking (PO boxes, missing house numbers, and the rules you set) is free forever, with no subscription. Clearer.io has no rules-only free tier. It's free to install, then usage-priced once you pass your first 100 orders.
Stops bad addresses before the order, on any plan
Address Verifier hard-blocks rule violations right in checkout on every plan, using Shopify's validation function, so a PO box never makes it onto the order. Clearer.io's in-checkout prompt needs Shopify Plus. On a standard plan, its checks run after the order is placed.
Your revenue comes first
We suggest a corrected address. We never silently overwrite one. And if our service is ever unreachable, checkout fails open: the sale goes through and the order is flagged for you, never blocked.
Pricing, head to head.
Address Verifier
First 100 orders free · no monthly fee
A free plan covers rule-based blocking forever. Verification is one charge per order, however many times the address is re-checked.
Install on ShopifyClearer.io
As of June 2026
Per order, flat worldwide, with the first 100 free and no rules-only free tier. The fee applies once a shipping address reaches the second checkout step, so abandoned checkouts can count on the in-checkout (Shopify Plus) setup.
A single failed redelivery runs $10–$25 in carrier fees and reships. At $0.04 per order, one delivery you save pays for hundreds of verified checkouts.
When Clearer.io is the better pick
- You sell from outside our five markets. Address Verifier is built for merchants in the US, Canada, the UK, Australia, and New Zealand, while Clearer.io serves merchants in 27 countries.
- You want the longest track record. Clearer.io has validated Shopify orders since 2017, with a large review base behind it.
Switching questions, answered.
Is Address Verifier cheaper than Clearer.io?
What's free, and what isn't?
Can I block bad addresses in checkout without Shopify Plus?
Does it work with Shop Pay and other express checkouts?
Do you cover the same countries as Clearer.io?
Try it on your next 100 orders, free.
Install Address Verifier, switch on the rules you want, and every address gets checked before it ships. No code, no theme edits.