Tallinn

Founded in 2011 by Kristo Käärmann and Taavet Hinrikus, the Estonian fintech unicorn company Transferwise announced on Monday the rebranding to Wise. The company has around 10 million international customers at present.
"The core experience of using Wise will remain faster, cheaper, and more convenient than anything else. Our mission remains the same. We’re still making — and always will be making — money work without borders," said Käärmann in a blog post
With offices initially in Tallinn later joined by London, where the company is headquartered, and other locations, including the United Arab Emirates.