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Developer(s) True Software Scandinavia AB
Development status Active
Operating systems Android, BlackBerry OS, iOS, Series 40, Symbian and Windows Phone
Type Telephone directory, Caller ID, Social intregration, Spam blocker, Crowdsourcing

Truecaller is a global phone directory application for smartphones and feature phones, and accessible via a Web site, developed by True Software Scandinavia AB. It finds contact details globally given name or telephone number, and has an integrated caller ID service using Crowdsourcing to achieve call-blocking functionality and social media integration to keep the phonebook up-to-date with pictures and birthdays. The name Truecaller comes from the app being able to show the True name of the Caller. The client is available for Android, BlackBerry OS, iOS, Series 40, Symbian, BlackBerry, and Windows Phone.


Truecaller was developed by True Software Scandinavia AB, a privately held company in Stockholm, Sweden founded by Alan Mamedi and Nami Zarringhalam in 2009.[1]

It was initially launched on Symbian and Microsoft Windows Mobile on 1 July 2009. It was released for Android and Apple iPhone on 23 September 2009, for RIM Blackberry on 27 February 2012, for Windows Phone on 1 March 2012, and for Nokia Series 40 on 3 September 2012.As of September 2012 Truecaller had five million users[2] performing 120 million searches of the telephone number database every month.[3] As of January 22, 2013 Truecaller reached 10 million users.[4]

In February 2014, Truecaller received $18.8 million in funding from Sequoia Capital, Open Ocean, Stefan Lennhammer, and an unnamed private investor. It also announced a partnership with Yelp to use Yelp's API data to help identify business numbers when they call a smartphone.[5]

Features and functionality

The service is a global telephone directory that has caller ID, social media integration and call-blocking functionality.[6][7] The application covertly uploads users' phone books and makes them part of its crowd-sourced database.[8]

The service gains global coverage from its crowd-sourced data, which enables it to work even in countries such as the UK and India where public data is not available.[9] The app is available in more than 100 countries worldwide.[10]

Truecaller is available for Android,[11] Apple iPhone,[12] RIM BlackBerry, Nokia Symbian,[13] Windows Phone 7, and Windows Mobile smartphones,[14] Windows Phone 8

On 18 September 2012 Techcrunch announced that Open Ocean Capital,[15] a venture capital fund led by former MySQL and Nokia executives (including Michael Widenius,[16] founder of MySQL), were investing US$1.3 million in Truecaller to push Truecaller’s global reach.[17] Truecaller said that it intended to use the new funding to expand its footprint in "key markets"—specifically North America, Asia and the Middle East.[18]

Server Security Issues

On 17 July 2013, Truecaller servers were allegedly hacked into by the Syrian Electronic Army.[19] The group claimed on its twitter handle to have recovered 459 GiBs of database, primarily due to an older version of Wordpress installation on the servers. On 18 July 2013, Truecaller issued a statement on its blog stating that their servers were indeed hacked, but claiming that the attack did not disclose any passwords or credit card information.[20]

Languages and localization

As of 2012 Truecaller was available in 12 languages and locales: English, Arabic, Swedish, German, French, Chinese, Swedish, Italian, Portuguese, Russian, Spanish and Turkish.


True Software Scandinavia AB won the gold mobile at the annual Swedish mobile awards (Mobilgalan) in November 2011 for Truecaller.[21] Due to privacy laws, Truecaller was previously not available in the United Kingdom,[22] but later became operational there.


  1. ^ Sredaktion, Dagens P (2012-02-14). "Erövrar världen med 500 miljoner mobilnummer". 
  2. ^ "Truecaller når 5 miljoner medlemmar | Applovin' - Allt om appar". 2012-09-04. 
  3. ^ "Open Ocean investerar i svenska Truecaller - Forum". 2012-09-19. 
  4. ^ "Big in India, Swedish phone directory service Truecaller hits 20M user milestone". Gigaom. 2013-01-22. 
  5. ^ Crook, Jordan (2014-02-06). "Truecaller Lands $18.8M Series B From Sequoia, Partners With Yelp To Verify Business Numbers". Tech Crunch. 
  6. ^ "Swedish Startup Truecaller celebrates 1 Million mobile users". Scandinavian Startups. 2011-03-23. 
  7. ^ "Se vem som ringer med Truecaller | Smartare Vardag". 2011-09-08. 
  8. ^ Gilbert, Zach (2012-02-27). "Get all the information on who’s calling – TrueCaller for BlackBerry now available". Crackberry. 
  9. ^ "CallerID app banned in Britain - reverse number lookups are illegal". TechEye. 2010-05-05. 
  10. ^ "Nya versioner av Truecaller ute nu! | Nyheter om Nokia". 2012-09-27. 
  11. ^ "Truecaller - Android-apps op Google Play". Retrieved 2012-10-10. 
  12. ^ "Truecaller - worldwide number search and spam filter for iPhone, iPod touch, and iPad on the iTunes App Store". 2012-09-27. 
  13. ^ "Nokia Store: Download Truecaller, See who is calling and many other games, wallpaper, ringtones and mobile apps on your Nokia phone". Retrieved 2012-10-10. 
  14. ^ "Search and find people worldwide". Truecaller. 2012-10-01. 
  15. ^ "Home | Open Ocean - Leading Investor in Community and Open Source Business". Open Ocean Capital. 2012-09-19. 
  16. ^ "Miljonregn över svenska Truecaller". IT24. Retrieved 2012-10-10. 
  17. ^ Clayton, Nick (2012-09-20). "Truecaller Collects $1.3 Million for Crowd-Sourced Phone Book". Tech Europe - WSJ. 
  18. ^ "Open Ocean Invests $1.3M To Push Crowdsourced Directory Truecaller’s Global Reach". TechCrunch. 2012-09-18. 
  19. ^ "Truecaller Server hacking". 
  20. ^ "Truecaller Statement post hacking". 2013-07-18. 
  21. ^ "Guldmobilen Mobilgalan 2011" (in Swedish). 2011-11-14. 
  22. ^ "Mobile Entertainment Forum". Mobile Entertainment Forum. Retrieved 2012-10-10. 

External links