(in alphabetical order)

ICICI Bank

Paytm

PhonePe

Standard Chartered Bank

State Bank of India

(in alphabetical order)

1Pay
Airpay
Airtel Payments Bank
Amazon Pay
American Express Banking Corp
Angelic Infotech
ANQ Digital Finserv
Axis Bank
Awlencan Innovations India
Bajaj Finserv
Bandhan Bank
Bank of America
Bank of Baroda
Bank of India
Bank of India
Bank of Maharashtra
Barclays
BNP Paribas India
Canara Bank
Cashfree
Central Bank of India
Citi Bank
City Union Bank
CoinDCX
CoinSwitch- Bitcipher Labs 
Cosmos Bank
Cushman Wakefield
CSB Bank
DBS Bank
DCB Bank
Equitas Small Finance Bank
Federal Bank
Fincare Small Finance Bank
Fino Payments Bank
Fintelekt Advisory Services
Financial Intelligence Unit India
FirstRand Bank
Fullerton India
Giottus Technologies
HDFC Bank
HDFC Mutual Fund
HSBC
ICICI Bank
IDBI Bank
IDFC First Bank
IndiaIdeas.com Limited (BillDesk) 
Indian Overseas Bank
IndusInd Bank
Jammu and Kashmir Bank
Jana Small Finance Bank
JLL
JP Morgan Chase Bank
Karnataka Bank
Kotak Bank
Livquick
Mashreq Bank
MUFG
Nainital Bank
Neblio Technologies
Nextgendev Solutions
NPCI
NSDL
NSE
NTT Data
One97 Communications
Paytm Payments Bank
PayU Money
PhonePe
Punjab National Bank
Rabobank
RBL Bank
Reserve Bank of India
SabPaisa
Saraswat Bank
SBI Life Insurance
SBM Bank
South Indian Bank
Standard Chartered Bank
State Bank of India
Suncrypto
Tata AIG Life 
The Karad Urban Co-op. Bank
The Karur Vysya Bank Limited
UCO Bank
Ujjivan Small Finance Bank
Union Bank of India
UNOCoin Technologies
WazirX - Zanmal Labs
Yes Bank
Zebpay
Zerodha Broking