Mr. Moskovitz founded the social-networking Web site with Mark Zuckerberg, who is now Facebook's chief executive, while they were both students at Harvard University several years ago.
Justin Rosenstein, a Facebook engineering manager, will also leave the company to join Mr. Moskovitz in starting a new software business. In a message left on Mr. Moskovitz's Facebook page, the two said they have been working on software for business users and wanted to incorporate the software into Facebook.
"But at some point it became clear that doing so wouldn't be good for Facebook or for us," he wrote. Mr. Moskovitz wrote that he sees the new venture as complementary to Facebook.
Several other executives have left Facebook over the past 18 months, including Owen van Natta, who served as chief revenue officer and chief operations officer; Adam D'Angelo, its former chief technology officer; and Matt Cohler, vice president of product management.
"Dustin has always had Facebook's best interest at heart and will always be someone I turn to for advice," said Mr. Zuckerberg in a statement.
And the email from Moskovitz:
At various times in our progress, people have come up to me to deliver a now familiar question: “did you ever imagine Facebook would be this big?” And I give a familiar answer: “well… yea, actually”. Frankly, Mark and I knew even at the beginning this was something the world needed. We went into the college market as a stepping stone - identifying dense nests in the graph that would lead us to the rest of the world. We could see far enough in the future to know there would be an impact, we just didn’t know exactly what it would be. Now I can look back on our progress and see the ways the world has changed, the ways we have changed it. We’ve altered the future in a score of ways, from making it easier to look up phone numbers and email addresses to making it more difficult for terrorists to isolate impressionistic youth in the middle east. At the same time we’ve built a competent and vibrant organization, driven by a passion to push the world more open.
In the process of helping to build a company, I found I had another passion: making companies themselves run better. It’s easy to confuse this with a desire to manage, but even when I tried to do that I found myself drawn back to code for the solutions to my problems; I didn’t want to construct efficiencies, I wanted to engineer them. Communication is the key to scale in any size organization and technology is the key to communication. I’ve seen us unblock ourselves time and again with new tools to increase transparency and passive information flow and many times it was the fruit of my own labors. While working on improving Facebook’s tools, however, I came to a very difficult conclusion: doing this for all the companies of the world was not the same project as doing it for one of them. This idea is one that needs an organization that was built to do it, with every fiber of its DNA engineered in a way that producing an extensible enterprise platform becomes little more than the logical consequence of an organism executing its own nature. Further, the things we’ve scoped for Facebook’s product team to do are the right things to be doing and I wouldn’t have agreed with asking the company to divert significant resources to approach a project so different and so boundless in scope. Every time we introduce something new, we do it at an opportunity cost and this is too large a detour to take when we are already moving swiftly in the right direction.
And Facebook is moving in the right direction. When Facebook has a billion members (and 800 employees? maybe 900?) and someone leans over to ask me if I ever imagined it would get that big, my answer is going to be “you’re damn right I did. how come it only has 20% of the market?”. To know that this is Facebook’s future and decide not be a part of it is the hardest thing I’ve ever had to do, but it’s allowed me to have a broader perspective for the future. Like you, I’ve worried about the people leaving the company but it took becoming one of them to understand that this is just another part of the ecosystem (you should just take my word for it though). I’m not leaving the movement - I’m becoming a new part of it. The inevitable flux of the men and women behind these organizations is what moves the industry forward in the same direction in a way that cross-company collaboration alone never will. As the world moves to modular stacks and applications built up from a smorgasbord of platforms instead of single toolkits, then the companies that build the parts will need to act more and more like cooperative teams in a single larger organization. As Justin would undoubtedly say, I am simply viewing the industry from a different level of abstraction. These changes are difficult and sad, and that’s certainly an understatement for me… but change brings new things and this particular change will bring a new ally to our mission - I think we can all be pretty pumped about that.
Whether I work here or not, I’ll forever bleed Facebook blue. Facebook has been my passion and my purpose for the past 5 years. Our new project is not a replacement for what we build here, but instead both a complement and a compliment, and we have every intention of making it feel like a natural extension of Facebook’s product and purpose. Similarly, my timing in leaving is not an indication that I have lost faith in our ability to succeed, but an affirmation in my confidence in the company’s enduring success irrespective of changing faces.
Justin and I going to be around for at least another month and I am really looking forward to going deeper on this idea with everyone and how we can continue to work closely with Facebook. I’ll always be really proud of the work we’ve done and grateful for the opportunity to work with such a uniquely remarkable team. We’ll also be at the Q&A later to help continue the conversation right away.