NTUA conducted a research titled “The Impact of Ridesharing Services in Athens” to investigate ridesharing socio-economic impact in Athens. The research concludes that the introduction of ridesharing in Athens has a significant positive impact to social welfare of the city improving environment quality, traffic conditions, road safety and economic growth, mainly due to the travel demand swift from private cars to ridesharing services. The emergence of ridesharing service in Greek islands is also discussed.