The untold story of Stripe, the secretive $20bn startup driving Apple, Amazon and Facebook

https://www.wired.co.uk/article/stripe-payments-apple-amazon-facebook

Tokenization: Why the Future of Payments Technology Will Be a Win for Merchants and Consumers

http://www.paymentsjournal.com/tokenization-why-the-future-of-payments-technology-will-be-a-win-for-merchants-and-consumers/

Petal raises $34 million and launches credit card for people without credit scores

https://venturebeat.com/2018/10/02/petal-raises-34-million-and-launches-credit-card-for-people-without-credit-scores/