A CGD Working Paper examines the impact of Ukraine’s ambitious procurement reform on outcomes amongst a set of procurements that used competitive tendering. The ProZorro system placed all of the country’s government procurement online, introduced an auction approach as the default procurement method, and extended transparency. The reform was introduced with a dramatic increase in the proportion of government procurement that was conducted competitively. This paper examines the impact of ProZorro and reform on contracts that were procured competitively both prior to and after the introduction of the new system. It finds some evidence of impact of the new system on increasing the number of bidders, cost savings, and reduced contracting times.