Eventbrite, a web-based company that tracks event invitations, ticketing and RSVPs for large events, has brought in $6.5 million in equity, debt, rights and security from Sequoia Capital, according to a filing with the SEC. Based in San Francisco, it is also backed by European Founders Fund. Bebo founders Michael and Xochi Birch and YouTube co-founder Jawed Karim have also contributed to Eventbrite’s now $9.5 million in financing.