RelevantID gathers data points from respondents’ computers which form the basis of a unique digital fingerprint for each machine. This fingerprint can then be used to make sure the same machine is not used to take the same survey more than once, or too many surveys in a short space of time.

Verity, meanwhile, works by checking a respondent’s self-reported information against public databases to ensure they are who they say they are.

ReInvention was launched in February by former Greenfield Online executives Hugh Davis and Keith Price (pictured).