Clef (app)

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Clef is a San Francisco based technology company, known for developing a mobile app that creates a two-factor authentication for websites.[1][2] It allows users to access sites with a single login password management service which stores encrypted passwords in private accounts.[3][4] It has a standard verification method that requires access to data on the mobile phone to confirm the user's identity.[5][6] The application requires a Wi-Fi or mobile network and user can log in by waving the phone at the screen.[7][8]

Clef was founded in 2013 by Mark Hudnall, B Byrne and Jesse Pollak.[9][10] It raised $1.6 in seed funding on 20 November.

Clef is available for all sort of content management system and easy to use with any website or application. It is most popular with WordPress community. Clef plugin was active over 1 million websites until they surprisingly announce on March 7, 2017, that they will no longer support this plugin after June 6, 2017.

The Clef plugin made logging into WordPress easy and more secure thanks to two-factor authentication. Clef is sunsetting and now users need to find an alternative.

Clef Plugin CEO recommends in his blog to transitioning away from Clef as a login method as soon as possible.[11]


  1. ^ Kyle Russell (19 February 2015). "Clef Offers Two-Factor Authentication Without All The Codes". TechCrunch. Retrieved 21 July 2016.
  2. ^ Andy Greenberg (26 June 2016). "So Hey You Should Stop Using Texts for Two-Factor Authentication". Wired. Retrieved 21 July 2016.
  3. ^ Nicole Perlroth (18 December 2013). "New Clef Plug-In Lets You Forget About Your Password". NyTimes. Retrieved 21 July 2016.
  4. ^ "Login to your WordPress Website without Typing the Password". Labnol. 7 May 2015. Retrieved 21 July 2016.
  5. ^ Marisa Kendall (4 October 2016). "Oakland drawing more tech startups". East Bay Times. Retrieved 21 July 2016.
  6. ^ Ben Dickson. "5 authentication methods putting passwords to shame". TheNextWeb. Retrieved 21 July 2016.
  7. ^ David Nield (22 February 2015). "Clef wants to change the way we log into websites". GizMag. Retrieved 21 July 2016.
  8. ^ Krystle Vermes (5 July 2016). "Startups & Technology That Will Probably Kill The Password". SnapMunk. Retrieved 21 July 2016.
  9. ^ Kim Mai Cutler (24 September 2015). "Oakland To Tech: Please Don't Screw This Up Like Last Time". TechCrunch. Retrieved 21 July 2016.
  10. ^ Mariah Carle (2 April 2014). "Oaktech: Oakland mobile start-up Clef ends need for password". OaklandLocal. Retrieved 21 July 2016.
  11. ^ [1]