German-based Lavaboom was founded in 2014, promising to implement end-to-end encryption for zero-knowledge privacy and three-way authentication if you pay for the secure email service. The buzzword NSA-proof has been used to describe the service, and more recently Swiss-based ProtonMail launched. The service has a 250 MB mailbox limit and two-factor authentication, but you cant use it yet. If you are like me, youve been on that list for months and months now.”]