"FrontierCities - European Cities driving the Future Internet" (FrontierCities) is a proposal presented to the FI-PPP Phase 3 CP-CSA Call. The project builds on the FI-PPP Phase I and II work, and is directly linked to the work carried out in FI-Phase II use cases INSTANT MOBILITY, and OUTSMART. While building upon Phase II, FrontierCities is however in line with the significant change in focus required under Phase III, and represents an ambitious, market-focussed project. Core objectives are to solicit and select high-calibre grant applications from SMEs and webdevelopers through a mix of strategies and market the results to a pan-European audience of cities. The project's biggest work focus and resource allocation is on supporting grantee projects to secure market uptake and/or commercialisation of their technology applications and services to both cities and wider private sector uptakers and enablers (corporations, investors).The FrontierCities consortium has significant experience across the various stages of the grant cycle, and has consolidated annual income of more than 1.1 billion euros. In addition to targeting higher-potential cities w.r.t smart mobility uptake, it brings together an innovative dual approach of a pan-European focus in parallel with four local geographical focal points in B, I, SI, and UK. The consortium's innovation support has the capacity to deliver pan-European reach through the involvement of Europe's largest innovation and commercialisation support network (EBN Network), combined with a range of local innovation actors and business enablers. A quality technology support dimension is ensured by three organisations previously involved in FI-PPP, including University of Surrey and Engineering SpA. Vertical Technology support (WP2) and Marketing (WP3) are included to ensure top quality support to grantees and to the market uptake work (WP6). A first set of impact indicators are set, which will be updated following the Call results.