?- PayPal Holdings Inc.
- Visa Inc.
- MasterCard Incorporated (MasterCard)
- Amazon Payments Inc. (Amazon.com Inc.)
- Alphabet Inc.
- Apple Inc.
- Mobiamo Inc.
- Paytm (One97 Communications Limited)
- Stripe Inc.
- Alipay.com Co. Ltd
- Fiserv Inc.
- Wordplay Inc. (Fidelity National Information Services)
- ACI Worldwide