The verdict
Square takes it, 2–1 on rounds.
On the published figures and the independent review sites, Square takes 2 of 6 rounds. Treat that as a starting point and check the current figures on both pages, because prices and plans move.
Choose Square if…
- • You want Square's edge on what customers say on trustpilot and how fast your money reaches the bank
Choose Adyen if…
- • You want Adyen's edge on the fixed fee on every sale
Round by round
- Round 1What customers say on TrustpilotSquare winsAdyen5/10
1.3 out of 5
TrustScore from 445 reviews on Trustpilot
- 1.3 out of 5, against 3.7 out of 5
Source: trustpilot.com ↗
Square wins this round on independent review-site data, not on its own claims.
- Round 2The fixed fee on every saleAdyen winsSquare5/10
30¢ per online sale
Square Free ($0/mo. per location)
- 30¢ per online sale, against 13¢ processing fee
Source: squareup.com ↗
Adyen8/1013¢ processing fee
Standard pay-per-transaction pricing, US Visa/Mastercard (Interchange++; rate shown is Adyen's markup)
Source: adyen.com ↗
Adyen wins this round on what the published sources say.
- Round 3How fast your money reaches the bankSquare winsAdyen5/10
1-2 days
Standard pay-per-transaction pricing, US Visa/Mastercard (Interchange++; rate shown is Adyen's markup)
- 1-2 days, against Next business day (free)
Source: adyen.com ↗
Square wins this round on what the published sources say.
- Round 4What it costs just to have an accountTieAdyen7/10
No monthly fee
Standard pay-per-transaction pricing, US Visa/Mastercard (Interchange++; rate shown is Adyen's markup)
Source: adyen.com ↗
Nothing to separate them here.
- Round 5Charging customers on a scheduleTieAdyen7/10
Yes (tokenization)
Standard pay-per-transaction pricing, US Visa/Mastercard (Interchange++; rate shown is Adyen's markup)
Source: docs.adyen.com ↗
Nothing to separate them here.
- Round 6Card readers for selling in personTieAdyen7/10
Yes (Adyen terminals)
Standard pay-per-transaction pricing, US Visa/Mastercard (Interchange++; rate shown is Adyen's markup)
Source: adyen.com ↗
Nothing to separate them here.

