Every processor.
Graded on evidence.

Montonio

Bank / A2A Payments

B

Montonio is an Estonian checkout company, founded in Tallinn in 2018, that sells online payments and shipping to small and mid-sized ecommerce stores in Estonia, Latvia, Lithuania, Poland and Finland. It began with open-banking bank payments, where the shopper picks their bank in the checkout and pays straight from their account. It now also bundles card and wallet payments, Inbank-funded pay later and financing, payment links and a multi-carrier shipping module. Its payment services run under a Bank of Lithuania payment institution licence held by Montonio Finance UAB. As of October 2026, Baltic merchants pay a monthly plan fee of €11.99, €14.99 or €39.99 before VAT. On top of that, a bank payment costs €0.05 to €0.20 and an EU consumer card costs 1.29% + €0.20 or 1.49% + €0.25, depending on the plan. In November 2025 Montonio began moving card processing from Stripe to Adyen; under Adyen, daily card payouts arrive two business days after the sale. Montonio says it serves more than 8,000 merchants with a team of about 65, and it is backed by Index Ventures. The price list is unusually complete and the bank-payment rates are low. On the other hand, the plans make card acceptance compulsory below the €39.99 tier, the general merchant terms are not published, and every card dispute costs €20, which Montonio's help centre now says is not refunded even if you win.

HiPay

Platform / Acquirer

B-

HiPay is a French payment service provider based in Levallois-Perret, outside Paris, that handles online, in-store and marketplace payments for mid-size and large European merchants. Its operating company, HiPay SAS, has been an authorised payment institution under France's banking supervisor, the ACPR, since August 2011, and passports that licence across the EU. The parent, HiPay Group, was spun out of the French digital media company HiMedia in June 2015 and trades on Euronext Growth Paris (ticker ALHYP). It processed €9.55 billion in 2025 for revenue of €74.8 million, and has reported a profit for three years running, though it booked a €1.4 million net loss in the first half of 2026. HiPay publishes no prices: its pricing page sends you to a sales form, and every rate, fee, payout schedule and contract term is negotiated per merchant. What it sells is a single contract covering cards, a long list of European local payment methods such as Bancontact, Bizum, MB Way, Bancomat Pay and Wero, PAX payment terminals and Tap to Pay in store, its own fraud tool (HiPay Sentinel), and a marketplace product built on escrow accounts. Retail is its core, and regulated online gambling is a fast-growing segment. Its Trustpilot score of 1.8 is dragged down by consumers disputing charges from merchants that use HiPay, not by reviews from merchants.

Pricing clarity

1.5

Feature set

4.0

Ease of use

3.0

CoinGate

Payfac / Aggregator

B-

CoinGate is a crypto payment gateway run from Vilnius, Lithuania, by UAB Decentralized. The company was registered in 2014 as UAB Virtualios Valiutos and began trading in 2015. Customers pay in crypto at checkout, and the merchant settles in euros, pounds, US dollars, a stablecoin or crypto. On 16 December 2025 the Bank of Lithuania authorised it as a crypto-asset service provider under the EU's MiCA regulation and licensed it as a payment institution. As of October 2026 the Standard plan charges 1% per payment with no monthly or setup fee. Crypto and SEPA withdrawals are free, with a 50 EUR minimum withdrawal, and SWIFT withdrawals cost 0.50% with a 50 EUR minimum fee. Automatic settlement runs weekly. Enterprise pricing is negotiated by volume. CoinGate's own pricing policy says the exchange rate on a payment includes a risk margin on top of the 1% fee, and it does not publish the size of that margin. Merchants must be based in a country on CoinGate's supported list, and that list does not include the United States. Trustpilot withholds CoinGate's rating for a breach of its guidelines and says it has removed fake reviews from the profile. Recent one-star reviews there describe payments held for compliance checks.

Toss Payments

Payfac / Aggregator

B-

Toss Payments is the online payment gateway (PG) business of Viva Republica, the company behind South Korea's Toss finance app. It began as LG Uplus's electronic payments division, which Viva Republica agreed to buy in December 2019. LG Uplus spun the division off as a new company in August 2020, after postponing a planned 1 June split, and it launched as Toss Payments on 3 August 2020. It is headquartered in Gangnam, Seoul, and serves Korean online businesses. It also offers PayPal and overseas-card acceptance for selling abroad. As of October 2026 the published price is 3.4% on credit and debit cards for merchants on the general tier, 2.0% on bank transfers (minimum ₩200) and ₩400 per virtual-account payment, all plus 10% VAT. On top of that comes a ₩220,000 joining fee and a ₩110,000 annual fee. Smaller merchants that qualify under Korean law get preferential card rates applied automatically. Contracts run for two years and renew automatically for two more unless either side gives written notice a month before the end. In July 2026 Viva Republica filed a decision to absorb Toss Payments by merger, with a scheduled merger date of 30 November 2026, subject to regulatory approval. Toss Payments will then cease to exist as a separate company, and its contracts pass to Viva Republica, which said in the filing that it has no plans to change or discontinue the business. It has not said whether the Toss Payments name will continue. In September 2026 Toss Payments disclosed that 4,131 payment records from one merchant had been viewed without authorisation, and the Financial Supervisory Service opened an on-site inspection.

Przelewy24

Platform / Acquirer

B

Przelewy24 is a Polish online payment gateway run by PayPro S.A. of Poznań, a national payment institution supervised by Poland's financial regulator, the KNF. The Danish group Nets took control of PayPro in 2019, Nets merged into Italy's Nexi in 2021, and Nexi's June 2025 report lists PayPro as wholly owned. It gives a Polish online shop the payment methods Polish shoppers expect in one integration: BLIK, pay-by-link bank transfers, Visa and Mastercard cards, Google Pay and Apple Pay, plus instalments and buy-now-pay-later through partners. As of October 2026 the standard fee for BLIK, bank transfers and PLN card payments is 1.29% + PLN 0.30 per transaction, with VAT added where the law requires it. There is no monthly fee, refunds are free, and the PLN 59 activation fee is refunded once you complete 10 transactions in your first two months. Funds are available by the end of the next business day, and four PLN payouts a month to a Polish bank account are free. The contract has no fixed term and either side can end it on one month's notice. Pricing and terms are unusually well published. The weak points are payments outside Poland, which cost more and need foreign-currency accounts, broad rights to hold funds (up to 180 days on card transactions under review), a PLN 100 fee it can charge on each chargeback, and a Trustpilot score of 1.3 that is mostly payer complaints but includes merchants describing frozen funds and slow verification.

Primer

Gateway / Orchestration

B-

Primer is a London payments orchestration company founded in 2020 by former Braintree staff Gabriel Le Roux and Paul Anthony. It does not process payments itself. A merchant connects its own accounts with processors such as Adyen, Stripe or Braintree, and Primer sits on top: one checkout and API, a card vault that is independent of any one processor, no-code workflows that decide where each payment goes, automatic fallback to a second processor when the first declines, 3D Secure, network tokens, and reporting and reconciliation across every provider. Newer add-ons include an AI assistant called Companion, a fee breakdown tool called Costs Overview, and Global Accounts for holding and converting currencies, which Primer provides through a partner. Primer publishes no prices. As of October 2026 there is no pricing page; fees are set in a signed order form, charged on billable events such as payments, settled transactions, 3DS checks or workflow actions, and topped up to a minimum commitment if usage falls short. The contract runs for a minimum term and then renews for a year at a time unless you give 30 days' notice. Primer raised a $100 million Series C in May 2026 and says it has raised $174 million in total. It is built for mid-size and enterprise merchants running more than one processor, not for small businesses looking for a first card account.

Pricing clarity

2.0

Feature set

4.5

Ease of use

3.5

Vipps MobilePay

Platform / Acquirer

B

Vipps MobilePay is the bank-owned Nordic mobile wallet formed in November 2022 when Norway's Vipps and Denmark's MobilePay merged. It is the payment app most consumers in Norway and Denmark already carry, and a large one in Finland, so for a Nordic business it is less a choice of processor than a payment method customers expect to see. The merchant agreement is signed directly with Vipps MobilePay AS, a Norwegian e-money institution supervised by Finanstilsynet, with branches in Copenhagen and Helsinki. Prices are published per country and charged per transaction, with no monthly fee for the payment products. As of October 2026 online payments cost 2.99% + NOK 1 in Norway, 0.59% + DKK 1 in Denmark (rising to 0.89% + DKK 1 on 1 January 2027) and 2.49% + EUR 0.20 in Finland; in-person payments through a Vipps/MobilePay number or the mobile point-of-sale cost 1.75% in Norway and Finland and 0.99% in Denmark. The merchant terms exclude VAT unless stated. There is no fixed term: either side can end the agreement on two months' notice. Funds settle daily by default. The weaknesses are scope and reputation. It is a Nordic wallet, not a general card acquirer, it sold its multi-method Checkout product to Kustom in 2026, and consumer reviews on Trustpilot are poor. MobilePay will be renamed Vipps in Denmark, Finland and Greenland on 12 January 2027.

Stone

Platform / Acquirer

B

Stone is the small and mid-size business brand of StoneCo, the Nasdaq-listed (STNE) Brazilian payments and banking group. The merchant agreement is with Stone Instituição de Pagamento S.A., which the Banco Central do Brasil authorises as a card acquirer (credenciadora) and e-money issuer. Stone sells card terminals (maquininhas), a tap-on-phone app called TapStone, payment links, e-commerce processing, a free business account (Conta PJ) and working-capital credit. As of October 2026 it publishes some rates: TapStone at 0.87% for debit and 1.90% for one-off credit (crédito à vista), and payment links at 2.99% for one-off credit. Terminal rates are personalised: the terminal page advertises debit from 0.74% and credit from 2.99%, and you get your own rates after an assessment. The contract has no fixed term and the merchant can end it on 30 days' notice without penalty. StoneCo's cheaper micro-merchant brand, Ton, is a sibling sold separately, with its own published plans.

Pine Labs

Payfac / Aggregator

B-

Pine Labs is an Indian merchant payments company based in Noida. It began in 1998, is best known for the card terminals found at Indian shop counters, and has listed on the NSE and BSE since 14 November 2025. It rents in-store terminals and UPI soundboxes, runs an online payment gateway called Pine Labs Online (formerly Plural), and offers debit and credit card EMIs at the till through partner banks and brands. Its other lines include payouts, cross-border card acceptance and prepaid gift cards. The Reserve Bank of India lists Pine Labs Limited as an authorised payment aggregator for online, physical and cross-border (inward and outward) payments. Pricing is the weak spot. As of October 2026 the online gateway shows only 0% MDR on UPI and asks you to contact sales for everything else. Terminals carry 'starting at' monthly prices from ₹75 to ₹450, but the page does not say whether GST is included. Online payments settle T+1 by default, with early-batch and same-day settlement available. The published online terms have no fixed term, but they let Pine Labs hold 30% of payouts for 15 days after either side gives notice to end the service, and 100% for up to 120 days after a breach. Merchant complaints describe rental charges that continued after a terminal was surrendered, charges merchants say were not disclosed at sign-up, and delayed settlements.