Kru beat off competition from two other agencies and has signed up for a three-year deal. There is no incumbent on the account.
The company will be responsible for supporting more than 1,200 annual events held by Givergy’s managed event service.
Jonathan Douglas, chief operating officer of Givergy, said: "We managed things in house successfully for a number of years but, our ever-increasing demand by charities has meant that it was time to handover the reigns to staffing specialists that are recognised for a service of excellence.
"This enables our team to get back to the job in hand – helping our charity clients raise more through our technology.
"We needed to be meticulous in our agency selection process however as having the right staff at our events is paramount; it was clear that Kru Live were the best fit for our brand and most importantly our clients and we are hugely excited by the partnership."