OPNsense ndi gwero lotseguka, FreeBSD-based firewall and routing software yopangidwa ndi Deciso, kampani ku Netherlands yomwe imapanga hardware ndikugulitsa phukusi lothandizira OPNsense. Ndi foloko ya pfSense, yomwe idapangidwanso ndi m0n0wall yomangidwa pa FreeBSD. Idakhazikitsidwa mu Januware 2015.