Hi, I'm the founder of Academia.edu.<p>The author of the article objects to the introduction of a freemium model on Academia.edu, and specifically to the idea of advanced search being in the premium set of features.<p>Academia’s mission is to get every academic paper ever written on the internet, available for free, and to develop a more rigorous and efficient peer review system. Free access to academic research makes the world a more equitable place, and rigorous and efficient peer review accelerates the pace of scientific and scholarly research.<p>Academia launched in 2008, and now around 35 million people use the site a month. Around 19 million papers have been uploaded, and are freely available on the platform. Forty percent of Academia’s users are from developing countries and would otherwise have limited access to academic research.<p>In order to achieve Academia’s goals, Academia is working to become a sustainable operation. In order to do that, we introduced Academia Premium, which includes extra features such as Readers, Mentions, Expanded Analytics and Advanced Search.<p>- Readers tells you who is reading your papers<p>- Mentions alerts you when papers are uploaded mentioning your name<p>- Expanded Analytics provides a more detailed look at what kinds of people visit your profile and how people find your papers<p>- Advanced Search allows you to find exact keyword matches in the full text of every paper on Academia<p>In considering what features to offer in the Premium account, we decided that features related to the mission of the company should be free. This means that features related to open access (free access to uploading and downloading papers), and features related to peer review (sessions, recommendations) are free. As we add new features to Premium, we will continue to ensure that features related to the mission (open access, sessions, recommendations) are free.<p>We are grateful to all the academics who have contributed to Academia, and we will continue to serve academics from around the world.