Clef (app)

From Wikipedia, the free encyclopedia

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


Clef was founded in 2013 by Mark Hudnall, B. Byrne and Jesse Pollak.[9][10] It raised $1.6 million in seed funding in November 2014.[11] Clef integrated with many websites and applications, including WordPress. On March 17, 2017, Clef announced they would no longer support the plugin after June 6, 2017; Clef was acquired by Authy, another 2FA service, which later got acquired by Twilio.[12]


  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. Archived from the original on 29 August 2016. Retrieved 21 July 2016.
  11. ^ FinSMEs (2014-11-18). "Clef Secures $1.6M in Seed Funding". FinSMEs. Retrieved 2020-05-04.
  12. ^ "When two-factor authentication app Clef shuts down in June, its staff will join Authy". TechCrunch. Retrieved 2020-05-04.