What are some alternatives?
Symantec Email Security.cloud - Symantec Email Security.cloud provides always-on, inbound and outbound email security against malware, targeted attacks, and advanced threats
Intelligent Syncing from PieSync - Two-way sync between your CRM, ESP & Cloud Apps
Cisco Email Security - Cisco Email Security protects against ransomware, business email compromise, spoofing, and phishing.
FullContact for iOS - Better contact management for your iPhone and iPad
NeoCertified Secure Email - NeoCertified is a solution that provides secure email encryption for businesses and organizations across all industries, including healthcare, finance, legal, non-profit and education.
ContactRescue - Magically get your address book up-to-date and accurate