WePay is a Y Combinator-backed startup originally formed mostly to make it easier for groups to collect money and make payments together. But it’s recently gone beyond just helping out groups, providing an ultra-simple platform for anyone to collect and manage payments online. It’s added support for event registration and ticketing, custom invoicing, donations, and e-commerce. A few weeks ago, it even rolled out a white-label payments API and lowered its prices to court third-party developers and better compete against PayPal and others.

Now the company is making it even easier for websites to collect money, sell goods, or receive donations, by offering up a way to accept payments right on a client’s website. For site owners, adding a WePay Payment Button is as easy as embedding a YouTube video — they merely add a small cut-and-paste piece of code to the site.