Every processor.
Graded on evidence.

Wave (Wave Financial)

Payment Processor

B-

Wave is a Toronto software company, started in April 2010, that gives away accounting and invoicing to very small businesses and makes its money when those invoices get paid. H&R Block bought it for $405 million in a deal that closed on 1 July 2019, and it has been a subsidiary ever since. Payments run at 2.9% plus 60 cents for Visa, Mastercard and Discover, 3.4% plus 60 cents for American Express, and 1% with a $1 minimum for bank payments, with no monthly fee on the free Starter plan; a $19-a-month Pro plan waives the 60-cent card fee on the first ten transactions each month and adds features. Card money lands in one to two business days, bank payments in one to seven, and eligible accounts can pull an instant payout to a debit card for a further 1%. Since November 2020 Wave has served the United States and Canada only. Its US card processing is powered by Adyen and Stripe, which Wave discloses in its own terms.

Riverside Payments

ISO

C+

Riverside Payments is an independent sales organisation in Vancouver, Washington, registered with the Better Business Bureau since 2014 and a registered ISO of Wells Fargo Bank, N.A. of Concord, California. It sells merchant accounts to small and mid-sized US businesses through a field sales force, pairing card processing with point-of-sale hardware from Clover, Dejavoo, TouchBistro, Aldelo and NCR. Its pitch is built on two promises that recur throughout its marketing: free and secure point-of-sale or credit card machines, and help getting out of a contract with your existing processor. It publishes no rates, no fees and no contract terms. The public record is where the difficulty lies: the BBB records 256 complaints against the company in the last three years, 71 of them closed in the last twelve months, with consistent themes of savings that did not materialise, difficulty cancelling, and equipment that turned out to be financed through a separate, non-cancelable 48-month third-party lease rather than supplied free.

PaySimple

Payment Processor

B-

PaySimple is a Denver payments-and-billing platform for service businesses — the kind that invoice, take deposits and bill the same customers month after month rather than ring up a counter. Its own about page dates the business to 2006 and puts it at more than 22,000 businesses; the site footer carries a 2005 copyright and the Better Business Bureau file records a December 2006 start, so the exact birth year depends on which document you read. What matters more is the lineage: the company Eric Remer founded as PaySimple is the company that was incorporated as EverCommerce in 2016 and listed on Nasdaq in 2021. PaySimple was not bought by EverCommerce so much as it became it, and the brand now sits inside that group as one product among many — the BBB file is registered to "EverCommerce Solutions Inc., DBA PaySimple Inc." PaySimple is a registered ISO of Fifth Third Bank and of Wells Fargo Bank. Pricing is published in full and unusually plain: $79.95 a month with every feature included, 2.9% plus 30 cents on cards, 1% plus 30 cents on ACH, no contract and no cancellation fee.

Merchant Lynx Services

ISO

C

Merchant Lynx Services is a Florida independent sales organisation, operating from Palm Beach Gardens as the trading name of Groundhog Enterprises, Inc., which the Better Business Bureau records as having started in April 1999. It is a registered ISO/MSP of Esquire Bank, N.A. of Jericho, New York and a registered ISO of Deutsche Bank AG, New York, and it sells card processing, its own Lynx POS system, check guarantee, gift cards, digital check imaging and merchant cash advances to small and mid-sized businesses across retail, hospitality, healthcare, education, automotive and government. The company advertises itself as an Inc. 5000 business and claims a ranking of 21st among US acquirers. The terms behind that sales pitch are published on its own website and are unusually onerous: the merchant agreement runs an initial three-year term, renews automatically for successive three-year terms unless cancelled with 90 days' written notice, and carries a $495 early-termination fee that can be deducted straight from settlements. Equipment leases are separately non-cancelable. The BBB rates the business F and revoked its accreditation.

Bluefin

Payment Gateway

B

Bluefin is an Atlanta company that sells payment security rather than payment processing. Founded in 2007 and originally trading as Capital Payments, LLC doing business as Bluefin Payment Systems, it built its business on PCI-validated point-to-point encryption — technology that scrambles card data inside the terminal at the moment of the tap, so that what travels through the merchant's systems is already worthless to a thief. Around that it has assembled a gateway (PayConex), a decryption service sold to other processors and gateways (Decryptx), a tokenization platform for personal, health and card data (ShieldConex) and, more recently, a proxy layer called PointConex that adds validated encryption without forcing anyone to recertify their processor integrations. Bluefin says it now supports more than 40,000 customers across 60 countries through over 300 integration partners. Its headquarters is in Atlanta, with offices in Waterford, Ireland and Vienna, Austria; the Vienna presence came with its November 2022 acquisition of TECS Payment Systems. The Better Business Bureau rates it A+ and has accredited it since July 2017.

Sezzle

Payment Processor

B-

Sezzle is a Minneapolis buy-now-pay-later provider founded in 2016; Charlie Youakim, Paul Paradis and Killian Brackey are the co-founders named most consistently, though accounts of the full founding team differ. It began as a next-business-day ACH product and pivoted to instalments in 2017, listed on the Australian Securities Exchange on 30 July 2019, began trading on Nasdaq as SEZL on 17 August 2023 and left the ASX in January 2024. For the quarter ended 30 June 2026 it reported gross merchandise volume of $1.3 billion, up 37.9% year on year, total revenue of $149.7 million, up 51.7%, and net income of $40.8 million. For a merchant the bargain is the standard BNPL one but unusually cleanly stated: the shopper pays Sezzle a down payment, Sezzle pays you the full order value less your merchant rate, and Sezzle then carries both the fraud risk and the repayment risk for the six weeks that follow. What Sezzle does not do is tell you what that costs. There is no published merchant rate anywhere on its site — the fee is in the agreement you sign — and there are three separate ancillary charges most merchants only meet after signing.

QuickBooks Payments (Intuit)

Payment Processor

B

QuickBooks Payments is Intuit's card and bank-payment service, sold as an add-on to QuickBooks Online rather than as a standalone merchant account. Intuit was founded in 1983 and is headquartered in Mountain View, California; money movement is provided by Intuit Payments Inc., licensed as a money transmitter by the New York State Department of Financial Services, and the card acquiring itself runs through JPMorgan Chase Bank, N.A. and Paymentech, LLC under the commercial entity merchant agreement Intuit publishes. Rates are published in full and, as of the figures Intuit dated 30 April 2026, are 2.5% for in-person payments, 2.99% for invoices and other card and digital-wallet transactions, 1% for ACH bank payments, 3.5% for keyed cards, and 2.99% for buy-now-pay-later through Affirm. There is no monthly fee for Payments itself, no minimum and no long-term contract. The defining trade-off is reconciliation: nothing else puts card, ACH, PayPal, Venmo and Affirm volume straight into your books with no matching step, and nothing else in this price band has quite the same reputation for freezing deposits.

PNC Merchant Services

Payment Processor

C+

PNC Merchant Services is the card-acceptance arm of PNC Bank, and PNC describes it on its own site as an alliance between the bank and Fiserv — PNC owns the customer relationship and support, Fiserv provides the processing and the Clover hardware. It publishes flat rates, which most bank programmes do not: 2.60% plus $0.10 for a swiped, dipped or tapped card and 3.45% plus $0.15 for online, telephone or manually keyed transactions, with next-business-day funding on Visa, Mastercard, Discover and American Express when the money lands in a qualifying PNC business checking account. What it does not publish is the rest of the agreement — the monthly and annual account fees, the term length, and the liquidated-damages provision that applies if you leave early. That gap is not academic: in November 2021 PNC Merchant Services agreed to a settlement of up to $14.5 million to resolve two class actions brought by merchants over annual fees, early-termination fees and paper statement fees.

Melio

Payment Processor

B-

Melio is a US business bill-pay and accounts-payable platform founded in 2018 by Matan Bar, Ilan Atias and Ziv Paz, headquartered in New York with an R&D centre in Tel Aviv. It is not a card acquirer: instead of helping you take money from customers, it moves money out to your suppliers, letting you pay any vendor by ACH, cheque, wire or card even when that vendor accepts none of those, and syncing the result into QuickBooks, Xero or NetSuite. Xero announced its acquisition of Melio in June 2025 and completed it on 15 October 2025 for US$2.5 billion upfront in cash and equity, with up to a further US$0.5 billion payable over three years. Xero's announcement put Melio at 80,000 customers, more than US$30 billion of payments processed in FY25 and US$153 million of FY25 revenue. Melio publishes its entire fee schedule, which is rare in this market and the single strongest thing about it. Against that sits a Better Business Bureau rating of F and a large, consistent body of complaints about accounts suspended mid-payment with funds already in transit.