Chime is now worth $14.5 billion

Chime, the start-up that delivers banking services through mobile phones, has closed a fundraising that values the company at $14.5 billion, CNBC has learned exclusively.

That lofty figure makes Chime the most valuable American fintech start-up serving retail consumers. In this latest round, a Series F that raised $485 million, Chime more than doubled its valuation from December and is worth almost 900% more than just 18 months ago, when it hit a $1.5 billion valuation.

Read more: CNBC