Mageni is described as 'helps you to scan, assess and manage your vulnerabilities'. There are more than 25 alternatives to Mageni for a variety of platforms, including Windows, Linux, Online / Web-based, Mac and Self-Hosted solutions. The best alternative is Metasploit. It's not free, so if you're looking for a free alternative, you could try OpenVAS or Armitage. Other great apps like Mageni are Nessus (Paid), Probely (Freemium), Acunetix (Paid) and Cobalt Strike (Paid).