I have been using LeadKnack for about 2 years for lead generation for my real estate investment business. In my opinion, I would say that they are one of the top lead generation companies if you need leads for wholesale deals, flips, buy and hold deals and even listing's. They do require a 2-campaign minimum on some of their packages, but I was able to get all of the money that I invested back, plus more! They actually care about your success, I can definitely tell that by how responsive and involved they are throughout the whole process. I don't have the time or resources to generate leads on my own, so I will certainly be using them for years to come!