Head to head
Compared side by side on published facts and the same six criteria every review is graded on — generated from the live directory, not a sales page.
CARDZ3N
Payment Processor · 3.0/5 mean
CARDZ3N is a global payment processing platform that supports multi-channel payments, including credit cards, ACH, crypto, and BNPL, tailored to both standard and high-risk merchants.
Read the full review →Square
POS System · 3.8/5 mean
Square offers simple, transparent payment processing ideal for small businesses. Flat-rate pricing, no monthly fees, and excellent software make it a top choice — but account holds and limited support are key concerns.
Read the full review →Square holds the higher standing — by grade, then mean category score. The row-by-row picture below is what should actually decide it for your business.
Both graded against the same six criteria. How we grade · Last fact-checked August 19, 2026 and September 2, 2026.
| Criterion | CARDZ3N | Square |
|---|---|---|
| Pricing transparency | 2.0 | 4.0wins this criterion |
| Feature set | 4.0 | 4.0 |
| Ease of use | 4.0 | 5.0 |
Straight from each provider's published documentation. Where a number isn't published, we say so rather than estimate.
| Metric | CARDZ3N | Square |
|---|---|---|
| Online rate | Not disclosed | 3.3% + $0.30 for Square Online and invoices on the free plan; 2.9% + $0.30 through the Payments API, or on Plus and Premium |
| Monthly fee | Not disclosed | Not disclosed |
| Payout | Not disclosed | Next business day |
| Contract | Likely long-term contracts | Month-to-month |
| In-person rate | Not disclosed | 2.6% + $0.15 (free plan); 2.5% + $0.15 (Plus); 2.4% + $0.15 (Premium) |
| Keyed rate | Not disclosed | 3.5% + $0.15 |
| International rate |
From the CARDZ3N review
Square offers transparent flat-rate pricing, month-to-month terms, and free POS software that small low-risk merchants can start using immediately — the profile CARDZ3N itself is not aimed at. CARDZ3N remains the better route for high-risk businesses Square declines and for merchants needing crypto, ACH, SEPA, or BNPL in one mix.
Pick Square if you are a small low-risk seller who wants flat rates and instant setup
Ideal for
Not recommended for
Ideal for
Not recommended for
The full reviews carry the pricing narratives, contract analysis and everything else behind these numbers — or let the matching funnel score the whole directory against your business.
| Customer support | 3.0wins this criterion | 1.0 |
|---|
| Contract terms | 2.0 | 5.0wins this criterion |
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| Industry reputation | 3.0 | 4.0wins this criterion |
|---|
| Not disclosed |
| Additional 1.5% on cards issued outside your account's country |
| Chargeback fee | Not disclosed | None |
|---|
| Last fact-checked | August 19, 2026 | September 2, 2026 |
|---|