W2C2P
WAuthorize.Net
WBillDesk
WBitPay
WBKash
WBlik (payment system)
WCash App
WE-commerce credit card payment system
WEdy
WEWay
WFlooz.com
WFortumo
WGNU Taler
WGoogle Pay
WGoogle Pay Send
WIP Payments
WMastercard
WMeeza
WMi-Pay
WMonzo
WN26
WNagad
WNaver Pay
WRonald "Ron" Oliveira
WOpayo
WPaya, Inc.
WPayconiq
WPayoneer
WPayPal
WPayU
WRecargaPay
WRed Dot Payment
WSage Group
WStripe (company)
WSystemSpecs
WTouch 'n Go eWallet
WUnPAY
WVerifi
WVerve International
WWooCommerce
WXsolla
WZelle (payment service)