As of my knowledge update in September 2021, the top 10 financial technology companies in terms of valuation are:
1. Ant Group – Valued at $150 billion (Private)
2. Stripe – Valued at $95 billion (Private)
3. Klarna – Valued at $45.6 billion (Private)
4. Robinhood – Valued at $40 billion (Public)
5. Coinbase – Valued at $76 billion (Public)
6. Chime – Valued at $14.5 billion (Private)
7. Plaid – Valued at $13.4 billion (Private)
8. Adyen – Valued at $73 billion (Public)
9. Revolut – Valued at $33 billion (Private)
10. Brex – Valued at $7.4 billion (Private)
Please note that valuations can change rapidly, and there might be fluctuations in the rankings depending on the updated information available.