Danish start-up Pleo raised $150 million in a financing round co-led by Bain Capital Ventures and Thrive Capital. : Danish start-up Pleo, which sells corporate expense management software and linked "smart" payment cards, has boosted its valuation to $1.7 billion in a $150 million equity financing round. The investment, led by Bain Capital Ventures and Thrive Capital, makes Pleo the latest privately-held tech company in Europe to surpass the coveted $1 billion "unicorn" valuation.