Hello! I've done some testing with some areas between the OSE and the Majestics, and found a big difference in the count of backlinks, see: Domain: imarca.com.br http://www.opensiteexplorer.org/www.imarca.com.br/a!links (Linking Root Domains: 17 | Total Links: 62) VS https://www.majesticseo.com/reports/search?folder=&q=imarca.com.br (Domains: 400 | Backlinks: 4,509) What is the conclusion to be reached with this test?
How did you build the links to your website? Did you build only to www version of both? If you have built links to both then the weight would be split and sometime not counted. A good example is - you build 100 links and 50 links to www.domain.com while another 50 going to domain.com. Those links weight would be separated and counted in half. This may be a reason that why link shows on majesticseo is a lot more than opensiteexplorer. They may count on all links to every version of your website including subdomain.