Compare Chrome extensions: Digify for Gmail: Encrypt, track, and unsend vs WA Self Sender - Free Messages Sender

As seen on Venture Beat, Product Hunt, Netted by the Webbys - Webby Awards:

Stay in control of your confidential messages and documents with Digify for Gmail, a free-to-install Chrome extension.

• Protect your emails and files with advanced encryption and security
• Control who can access your message/file and restrict downloading or printing
• Add a dynamic watermark that includes the recipient’s email address
• Set an expiry date or a self-destruct timer for your message/file
• Digify automatically encrypts your composed message and file attachments

Find out if your message and attachments were viewed by the right people

• View statistics to know who has viewed your message and attachment, how many times and for how long
• Track documents views, prints and downloads