Piazza

DocuSign is a San Francisco based company that provides electronic signature technology and digital transaction management services for facilitating electronic exchanges of contracts and signed documents. DocuSign’s features include authentication services, user identity management and workflow automation.

Stripe is an American technology company based in San Francisco, California. Its software allows individuals and businesses to make and receive payments over the Internet.

Typeform is a Barcelona-based online software as a service company that specializes in online form building and online surveys.

PayPal Holdings, Inc. is an American company operating a worldwide online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like cheques and money orders. The company operates as a payment processor for online vendors, auction sites, and other commercial users, for which it charges a fee in exchange for benefits such as one-click transactions and password memory.

Zappos.com is an online shoe and clothing retailer based in Las Vegas, Nevada. The company was founded in 1999 by Nick Swinmurn and launched under the domain name Shoesite.com. In July 2009, Amazon acquired Zappos in an all-stock deal worth around $1.2 billion at the time.

Amazon.com, Inc. is an American electronic commerce and cloud computing company founded by Jeff Bezos in 1994.