Not exactly, the technology in Holganix is completely the opposite of the one in the Agrotain products (Hydrexx, Umaxx and Uflexx).
Holganix contains bacteria (along with many other things) that are able to make nitrogen available in the soil and the Agrotain products contain a material that inhibits bacteria from doing their jobs in the soil (breaking down urea to make it available).
The possibility of them interfering with each other is almost 100%.
I agree with the last statement. We have been analyzing this product for over a year. It shows promise. I like the way they are positioning it as a bridge product that can reduce other chemicals being used and not a cure all. We are going to try it in a bigger way this year. Did some tests last fall that looked good.