AngelList

Followgram is a web app which extends the appealing Instagram's features, enhances the user experience and boosts your followers count. It provides users with plenty of exclusive features such as RSS feeds, photo galleries, Facebook integration as well as custom vanity URLs.

Last but not least, Followgram allows you to create a follow button for your website or blog.

Brands can activate Followgram brand pages with special features, web analytics and a customer engagement system.