The organiser of Sibos, the world’s biggest banking technology conference, has taken a hard line on cryptocurrency firms exhibiting at its upcoming conference in Australia, sparking a row between the events company and the fintech sector.

Fintech firms have been told by sales representatives at Sibos that the annual gathering — which will see more than 8,000 people gather in Sydney in October — is cracking down on crypto startups presenting their products at the event, according to people familiar with the matter.