Alternatives to Sfletter for all platforms with any license

Platforms

Desktop

Web / Online

Indie / Classic

Other Platforms

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  • ProtonMail icon

    ProtonMail

    Secure email with absolutely no compromises, brought to you by MIT and CERN scientists. Swiss Based ProtonMail is incorporated in Switzerland and our servers are located in Switzerland. We are outside of US and EU jurisdiction...

    Open Source Web / Cloud Android iPhone iPad

  • Tutanota icon

    Tutanota

    Tutanota is a free and open source web-mail client that focuses on privacy. There's also an Android and an iOS app. All data is stored encrypted and can not be searched, i.e. for commercial usage. It offers dead easy end-to-end...

    Open Source Web / Cloud Android iPhone iPad

  • SCRYPTmail icon

    SCRYPTmail

    SCRYPTmail is true end-to-end encrypted email service. Email and meta data, i.e sender / recipient are encrypted when you communicate within scryptmail domain. Public Source Code - all source code is available for public audit...

    Freemium Web / Cloud

  • EveryCloud icon

    EveryCloud

    EveryCloud’s cloud based spam filtering service blocks 99.99% of spam, viruses and even newsletters if required. Set spam reports to give users control and view 90 days logs of all inbound and outbound email. Filter for specific...

    Commercial Web / Cloud

    No features added Add a feature
  • Lockbin icon

    Lockbin

    Lockbin is a web application for sending private email messages and files. People use it to send things like credit card numbers or confidential information.

    Freemium Mac Windows Linux Android Android Tablet

    No features added Add a feature
  • runbox icon

    runbox

    Runbox provides secure email communication with Perfect Forward Secrecy SSL connections, Extended Validation, and options for PGP encryption. We are committed to protecting your data in accordance with Norway's strong privacy...

    Commercial Web / Cloud

    No features added Add a feature
  • Walnut Secure Email icon

    Walnut Secure Email

    Walnut Secure Email is P2P, person to person or end to end secure mail application that protects all of end-user existing accounts, including Gmail, Yahoo Mail, Microsoft Hotmail, live.com, Outlook and hosted addresses, and corporate...

    Commercial Windows Linux Android iPhone Blackberry Android Tablet ... iPad

  • Sendinc icon

    Sendinc

    Secure email made simple Sendinc enables anyone to send and receive military-grade encrypted email in minutes and requires no special technical expertise. There is no required software to purchase, download, or install. There are...

    Commercial Web / Cloud

    No features added Add a feature
  • Encipher.it icon

    Encipher.it

    Encrypting email with Encipher.it is a simple way to protect your sensitive data. You can encrypt emails or text messages and only the recipient can decrypt it with correct password. Encipher.it integrated with Gmail and many other...

    Free Web / Cloud

    No features added Add a feature
  • oneshar.es icon

    oneshar.es

    Sending confidential information such as passwords, account information and other sensitive data in emails and IM is not necessarily safe. That data is typically stored with remnants of the bits in places you don't need it to be.

    Free Web / Cloud Windows Mobile Android iPhone HP webOS Firefox OS

    • Discontinued The official website is no longer accessible and the iPhone app has been removed from the App Store.
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  • Shazzlemail icon

    Shazzlemail

    ShazzleMail is the first privacy-protective and surveillance-resistant secure email service.

    Free Personal Mac Windows Linux Android iPhone

    No features added Add a feature

Sfletter Comments

Perfect for PDF protection

Comment by StarAndrey
about Sfletter Mar 2015

I use it to protect my PDF files against leakage

Reply