Cities struggle to share high impact urban and social innovations due to a systemic flaw in the procurement system. 557,000 local governments cannot assume that their millions of decisions on procurement are well-informed - in fact we found that even the most informed cities only know 5-10% of available solutions. This comes at a high cost for the citizen, who as a majority are missing out on innovations by an average of 20-40 years. Citymart.com helps cities take leadership in shaping the common methods and needs which determine their marketplace. 82 global cities are now adopting common procurement 2.0 methods and are jointly building the worlds most complete catalogue of solutions for cities. Providers benefit by getting a new landscape of needs in real-time and at no cost, giving them a level playing field to win major opportunities in the most transparent and accountable manner.