Encipher.it - Encrypting email with Encipher.it is a simple way to protect your sensitive data.
SpamTitan - Comprehensive Email Protection. 99.99% Spam Detection. Blocks phishing, viruses, malware and other email threats.
Lockbin - Lockbin is a web application for sending private email messages and files.
MailCleaner - Cloud & on-premise anti spam software for businesses
secserv.me - Create client-side encrypted message. Chat anonymously client-side encrypted.
Vade Secure - Email security to protect against email-borne phishing, spear phishing, malware, and ransomware. Email security and management based on artificial intelligence.