An investigation by PETA revealed that the animals are chained, whipped, beaten and forced to spend long hours picking coconuts.
PETA cites animal abuse at 57 coconut processing operations in nine provinces of Thailand.
The organisation has called for a boycott of the meal-delivery service until it adopts 'more ethical' sourcing practices.
HelloFresh operates in a number of countries around the world - including New Zealand.
Last year, HelloFresh delivered almost 1 billion meals and reached 7.2 milllion active customers.
However, in a statement to FMCG, the company claims it has received "written confirmation" from all its suppliers that they do not obtain coconut milk from slave monkeys.
