David Wynne

Gauss Ventures Ltd. (Gauss Ventures) is a venture capital firm, founded in 2017. It is headquartered in London.

Curve OS Ltd. provides online payment services. It offers Curve payment card, a single card built on the MasterCard network that combines all client's cards into one. The company was founded by Shachar Bialick, Anna Mostyn Williams, and Tom Foster-Carter on April 2, 2015 and is headquartered in London, the United Kingdom.

Part of Trustly Group AB, Ecospend Technologies Ltd. is a London-based open finance technology platform provider founded in 2017. The company's client portfolio includes blue-chip private sector clients such as ITV, Toolstation, Anglian Water, and Mutual Credit Union, in addition to the UK government, for which Ecospend is the open banking provider. Ecospend's proprietary technology powers a product portfolio divided into two core areas: payments (pay-by-bank) services and data services such as affordability and identity verification solutions. Ecospend is authorized by the FCA for payments (PISP) and data (AISP) and has full API bank connectivity within the UK. On January 27, 2023, Ecospend Technologies was acquired by Trustly Group AB.

Momentum London provides management consulting services. The private company is based in London, UK.

Visa Europe Ltd. provides visa credit and debit cards. The company also provides commercial cards for government businesses. It also provides PIN, security and chip numbers for online shopping. The company is headquartered in London, the United Kingdom.