There are articles that compare various noise reduction tools. Here is a comparison I performed that I thought I would share. I welcome recommendations for better noise reduction tools. I started with a noisy image (underexposed). I tried Adobe Camera Raw (ACR), Capture One (C1) and DxO PhotoLab 2. In each case, I tried to eliminate every adjustment except exposure, contrast, sharpening and noise reduction. There is no way to apply the same adjustments to the image when you're using different RAW tools, so the results are somewhat subjective. Adobe Camera RAW: Capture One: DxO PhotoLab 2: DxO blew me away. It removed noise, didn't create artifacts at the edges (such as where the bird and the background meet) and revealed some detail that I swore was not in the original image. For a while, I wondered if it was just "making up" detail until I raised the noise level on the other two and saw that the ACR and C1 version also had the detail, but if I removed the image noise, I removed the details. No amount of fiddling with the "Noise", "Detail" and "Threshold" sliders restored the detail without also raising the image noise. C1 was second in quality, in my opinion. ACR was the worst. C1 revealed the same fine detail as DxO with a bit nicer contrast, but any attempt to lower the noise would wipe out the details. I use DxO's "Prime" noise reduction, which is only available in the Elite edition ($199). I also tried Topaz DeNoise AI. The results were pretty pathetic and not worth posting. I like C1 for the workflow and speed. I like DxO for its noise reduction. It may also be superior in its lens corrections. The two together are a pricey combination.