SiamPay

SiamPay is an online payment gateway that helps businesses in Thailand accept and manage digital payments across web, mobile, and additional selling channels. SiamPay supports card payments and alternative methods such as internet banking, cash-based over-the-counter payments, and China-focused payment options. The platform also offers add-ons such as tokenization for returning customers, recurring billing, payment links, and checkout branding features that merchants can enable as needed.

SiamPay Overview

SiamPay is operated by AsiaPay (Thailand) Limited and is positioned as a one-stop payment platform for Thai merchants. It is designed to support businesses of different sizes with a single gateway integration, plus administration tools for day-to-day payment operations.

SiamPay highlights multi-payment method support, multi-channel processing, multi-language checkout, and multi-currency processing.

Payment Acceptance Channels

SiamPay describes multi-channel processing that covers these acceptance contexts:

• Online (Web): Redirect to a secure payment page and return to a merchant-defined results page.

• In-App (mCommerce): Mobile-optimized checkout for smartphones and tablets.

• MOTO / Call Center: Mail-to-order and call center acceptance.

• Retail / On-The-Go: AppPay acceptance on a smartphone or smart payment terminal, including cards or QR codes.

Supported Payment Methods

SiamPay provides service pages and FAQ details covering these payment types and schemes.

Cards

• Visa

• Mastercard

• American Express

• JCB

Bank Account Payments In Thailand

• Internet banking payments in THB, with support for major Thai banks.

Cash Payments

• PayCash, allowing customers to pay in cash through participating bank and non-bank payment centers across Thailand.

China Payments

• China UnionPay

• Alipay

• WeChat Pay

Digital Wallets And Local Wallet Options

SiamPay lists support for services such as ShopeePay, Rabbit LINE Pay, TrueMoney Wallet, and PayPal.

Checkout pages can be presented in multiple languages, and the gateway supports multi-currency processing so customers can pay in THB, USD, or other supported currencies, while merchants receive settlement in their registered currency for cross-border card usage.

Checkout And Billing Flows

SiamPay supports multiple ways for merchants to collect payments, from standard hosted checkout to recurring billing.

Secure Hosted Checkout

SiamPay’s core flow uses a secure payment page to collect sensitive payment credentials. Merchants pass order and customer parameters needed for processing, and the customer completes payment on SiamPay’s page, reducing the need for merchants to handle card numbers within their own environment.

Payment Links And QR Code Payments

SiamPay provides a direct payment link feature to collect payments via email. For retail acceptance, AppPay supports QR-based payments alongside card acceptance on supported devices.

Tokenization For Returning Customers

MemberPay is SiamPay’s tokenization solution. It replaces sensitive card data with tokens that can be retrieved for subsequent purchases, supporting faster repeat checkouts while reducing exposure to raw card data.

Recurring Billing

SchedulePay is SiamPay’s recurring payment service, intended for subscription-style use cases where merchants need automated periodic collection.

Value-Added Commerce Modules

SiamPay offers optional modules that can be paired with payment acceptance:

• E-Voucher for creating and issuing digital vouchers and coupons.

• EventPay for event booking and payment processing.

• Online registration and hotel reservation tools for specific booking and form-based scenarios.

• Custom Payment Page to apply corporate branding at checkout and integrate selected SiamPay add-ons.

Risk, Security, And Compliance

SiamPay highlights layered security and anti-fraud controls designed for card-not-present payments.

PCI DSS And Transport Security

SiamPay states it is PCI DSS compliant, and its materials describe encrypted storage behind firewall controls, with TLS encryption used at the browser level for data in transit.

3-D Secure Support

SiamPay references 3-D Secure programs including Verified by Visa, Mastercard SecureCode, J/Secure (JCB), and American Express SafeKey.

PayAlert Fraud Management

PayAlert is SiamPay’s risk and fraud management service, described as a real-time system to identify, filter, and analyze suspicious transactions. SiamPay materials describe controls such as transaction filtering by IP and other attributes, plus validation against positive and negative lists for cards and IP addresses.

Reporting And Merchant Operations

SiamPay provides a merchant administration environment for reconciliation and operations:

• Merchants can track transaction status and download reports for accounting purposes.

• Gateway operations include void, capture, and refund requests, plus email-based payment notifications.

• Multi-level user administration supports role-based access in the back office.

Developer Integration

SiamPay publishes a PayGate integration guide covering client-side and server-side integration models, secure hash support for request validation, and datafeed handling so merchants can receive transaction outcomes for downstream order management and reconciliation. SiamPay also publishes a merchant user guide focused on operating the merchant administration environment.

Pricing And Onboarding Considerations

SiamPay does not publish a public price table. In its FAQ, it describes its commercial model as including an annual fee, a set-up charge, a transaction commission on received payments, and a chargeback handling fee. It also states there are no hidden costs like remittance fees or foreign exchange charges, and that rebate arrangements may be available for high-volume businesses. For certain debit payment contexts, SiamPay notes that a rolling reserve may be applied on a case-by-case basis instead of requesting an upfront deposit.

SiamPay provides indicative timelines in its FAQ:

• Standard plan approval is described as about 2 weeks.

• Premier plan approval is described as about 3 to 4 weeks.

• Implementation is described as about 2 to 5 working days, depending on technical readiness and complexity.

SiamPay also lists accepted currencies in its FAQ, including AUD, BND, CNY, EUR, HKD, IDR, JPY, KRW, MOP, MYR, NZD, PHP, THB, GBP, and USD, among others.

Conclusion

SiamPay is a Thailand-oriented payment gateway that combines card acceptance with alternative payment options such as internet banking, cash payments, and China payment methods. It supports hosted checkout, multi-channel acceptance (including mobile and MOTO contexts), and value-added capabilities such as tokenization, recurring billing, payment links, and branded checkout. For merchants that need a single integration plus operational reporting and fraud controls, SiamPay provides a structured gateway platform that merchants can tailor using SiamPay’s optional modules and service plans.