Previously backed by Stanford-StartX Fund, Firefly installs digital advertising screens on taxis to provide drivers with greater income and collect urban data for municipal authorities.

Firefly, a US-based outdoor advertising screen supplier backed by Stanford-StartX Fund, has secured $21.5m in a seed round led by venture capital firm NFX, VentureBeat reported on Thursday. Fellow VC firm Pelion Venture Partners also featured in the round, as did Decent Capital and angel investor Jeffrey Housenbold, managing director of telecoms firm SoftBank’s Vision…

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