Alternativas ao nvlope para OpenPGP com licença comercial

• OpenPGP
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Android Wear iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) PHP Windows Mobile Java Mobile S60 Android TV Chrome MetaMask Cloudron OpenPGP
• Licença comercial
  Qualquer licença Licença gratuita Licença Open Source Licença comercial