Dopplr was a free social networking service, launched in 2007, that allowed users to create itineraries of their travel plans and spot correlations with their contacts' travel plans in order to arrange meetings at any point on the...
See More ir journey. Additional features included allowing the user to calculate the carbon footprint their journeys have produced. The site was named after Christian Doppler, discoverer of the Doppler effect. The company was based in the "Silicon Roundabout" area of London.Notable staffMarko Ahtisaari: CEODan Gillmor: Founding TravellerSaul Klein: BoardLisa Sounio: Chairman of the BoardTaneli Tikka: COOInvestorsFirst-round angel investors in the site included Martin Varsavsky, Joichi Ito, Reid Hoffman, Saul Klein and Marko Ahtisaari. Second-round investors in fall 2008 were: Tom Glocer, Esther Dyson, Tyler Brûlé, Joshua Schachter, and Brian Behlendorf.