Current, a digital banking start-up that has gained momentum during the pandemic, has tripled its valuation to $2.2 billion just five months after its previous fundraising round, CNBC has learned. The company raised $220 million in a Series D led by new investor Andreessen Horowitz, according to Current CEO Stuart Sopp. The New York-based start-up's previous round in November valued it at $750 million. Current is chasing bigger competitors including Chime and Square's Cash App by providing inexpensive financial services though a mobile app.