Before SoftEther went open source, it was sold commercially as early as 2004. It was renamed PacketIX VPN around 2005 and is still sold commercially under that product name at <a href="https:&#x2F;&#x2F;www.softether.jp&#x2F;1-product&#x2F;11-vpn" rel="nofollow">https:&#x2F;&#x2F;www.softether.jp&#x2F;1-product&#x2F;11-vpn</a> (it&#x27;s up to v4.0).<p>I remember reading that there was a 10-year agreement that finally ended at the start of 2014, allowing the original developer to go open source. The source tree is different from PacketIX&#x27;s though, so some of the features are still not available yet in the open source version.