A serial entrepreneur, David's latest venture, Handwrytten, is bringing back the lost art of letter writing through scalable, robot-based solutions that write your notes in pen. Developed as a platform, Handwrytten lets you send notes from your CRM system, such as Salesforce, the web site, apps, or through custom integration. Used by major meal boxes, eCommerce giants, nonprofits and professionals, Handwrytten is changing the way brands and people connect.Prior to his current initiatives, David founded Cellit, a mobile marketing platform and mobile agency. Under David’s leadership, Cellit became a leading player in the mobile marketing space and invented the concept of mobile customer relationship management (Mobile CRM). Cellit developed one of the most robust and widely-used mobile marketing platforms in the world, delivering millions of SMS and MMS messages to consumers on a daily basis. With a marquee client roster including Abercrombie and Fitch, Toys R Us, Sam's Club, Chicago Tribune, For Rent Media Solutions, Pizza Hut and more, Cellit was recognized as one of the top 500 fastest growing companies in America, as #262 on the Inc. 500 in 2010, delivered many award-winning mobile campaigns, and built one of the best teams in the mobile industry. Cellit was sold to HelloWorld (f/k/a ePrize) in January of 2012. David is also a frequent speaker on messaging technology and has presented for the Direct Marketing Association, South By Southwest, Advertising Research Foundation, and the National Restaurant Association. David has been featured on the front page of the Washington Post, and has been interviewed by Direct Marketing News, Crain’s Chicago Business, the American Express OPEN network, AMA's Marketing News, Bloomberg Radio, and others. He has been quoted in numerous articles, including The Wall Street Journal, USA TODAY, Variety, Startup Nation and US Banker Magazine. David writes for Inc. Magazine with his column “Stepping Away from the Day to Day”.