TextSecure vs Sendinc

Uses Curve25519, AES-256, and HMAC-SHA256. The security of these algorithms has been tested over many years of use in hundreds of different applications. Messages sent via TextSecure are end-to-end encrypted, which means that they can only be read by your intended recipients. We make it easy for you to verify that you are communicating with the right people and that no MITM attack has occurred. The keys that are used to encrypt your messages are stored on your device alone, and they are protected by an additional layer of encryption if you have a passphrase enabled.

TextSecure is free and open source, enabling anyone to verify its security by auditing the code. TextSecure is the only private messenger that uses open source peer-reviewed cryptographic protocols to keep your messages safe.

To pass EFF's security review TextSecure had to encrypt data in transit, the encryption had to be end-to-end, the app needed to provide forward secrecy, app's source code has to be open to independent review, users have to be able to verify contact's identities even with the service provider compromised, app's cryptographic design has to be well documented and app's source code has to have been audited in the last 12 months.

Sendinc allows you to securely send emails and attachments up to 10mb with 256-bit SSL encryption. The messages are then destroyed 7 days later by default.

Your recipient only needs the link sent not another password to share. Messages are decrypted with an encryption key only available in the link sent to the recipient after they sign into Sendinc.

Sendinc operates without any downloadable programs. This is beneficial because it allows you to send secure emails from any computer without needing to download the program again and leaving a trail of what downloadable program you used.