Chain, which has raised $43m from investors including Visa, Orange, Nasdaq, Fiserv, Capital One and Citi, could be acquired for $500m in cash and tokens.

The Info Edge-backed restaurant listings platform has entered talks with investors including Ant Financial for a round that would value it at $2bn.

RWTH Aachen's Silexica has now raised $28m altogether for its software optimisation package for embedded supercomputer applications such as autonomous vehicle technologies.

Axel Springer Media for Equity was among the investors as the financial coaching service closed its latest round at $11m.

Immuno-oncology drug developer iTeos Therapeutics has secured funding in a 6 Dimensions Capital-backed series B round.

UCL has backed digital tuition platform Matr with funding and its support in creating a university-accredited qualification for training online teachers.

App development tool supplier Nginx has now raised $103m altogether, with a series C round that followed a Telstra-backed series B.

The CAA-backed tour activity booking platform took its overall funding to about $40m with a Cathay Innovation-led round.

Online advertising platform AppNexus is in talks with AT&T over a deal that would follow more than $340m of funding from backers such as WPP, Microsoft, News Corp and Deutsche Telekom.