This information applies to version(s): 1, 2, 3
DxO PhotoLab 5, 6 & 7 ELITE Edition users already have access to DeepPRIME and DeepRIME XD (PhotoLab 6 & 7), so purchasing the additional software is not necessary unless you wish to have the denoising capabilities available in its own software and/or enhanced batch processing with the option to shuffle the order of images and priority within a batch.
For users of DxO PhotoLab ESSENTIAL Edition, DxO PureRAW will allow you to use the newest DxO Labs denoising algorithm, but it may be more beneficial to you to just upgrade in your customer account to DxO PhotoLab 7 ELITE Edition.