domain name: stripe.com
Stripe's investors include Sequoia Capital, Andreessen Horowitz, and PayPal co-founders Peter Thiel, Max Levchin, and Elon Musk.
Address is 3180 18th Street, Suite 100, San Francisco, CA 94110.
More about Stripe: Stripe is the breakthrough startup of 2014: "... For Stripe, the year  started off with the news that it had raised $80 million in funding at an eye-popping valuation of $1.75 billion and ended with the news that it had raised another $70 million at double that valuation. In between, the startup scored a number of high-profile partnerships including with Apple, Twitter, Alipay and others... Stripe used some of its funding to invest in international efforts; the service is now available in 18 countries. It also continued to build out its suite of supplementary services, including launching a tool that lets businesses charge customers in whatever currency they're comfortable with. "Everyone is kind of focused on the fact that we do payments and basing a lot of their assumptions about our business on that," Cordova says. "In reality, we are building the products and tools that help businesses run efficiently... without needing a 50 person tax and compliance team." That is what Stripe will be working to solve globally in 2015 and beyond. "We don't really see anybody else approaching the problem the way that we do and thinking about building the platform of Internet commerce," Patrick told me in our earlier interview. "We want to increase the GDP of the Internet."