About Guardtime

Who we are

The world's largest blockchain company by revenue, headcount and actual customer deployments. A team of over 130 cryptographers,  developers and security architects, with decades of experience defending networks from nation-state attack.  We underpin an entire government and our customers include the largest global defense and telecom vendors. 

What we do

We solve hard problems for enterprise and government customers leveraging our KSI® blockchain stack. Our key insight is that the most valuable application of blockchain is for supply chains - software, physical and information supply chains that are within and across organizations.  We work with clients to understand those supply chains and build solutions to harden them, eliminating inefficiencies and providing mathematical certainty for their integrity  - track and trace at the digital and physical item level.

Our Philosophy 

The Guardtime stack is the Unix philosophy applied to blockchain - abstraction and encapsulation  into layers that do one function well. The idea that you can take a cryptocurrency protocol and apply it to enterprise problems is just dumb.

Our Mission

Google's mission to organize the word's information and make it universally available. Our mission is to validate that information and make it universally reliable.


Office locations


The Netherlands

Pinnacle Tower Rapenburgerstraat 177/S, 
1011 VM Amsterdam 
The Netherlands

Irvine, CA

United States

5151 California Ave, Suite 210
Irvine, CA 92617 
United States



A. H. Tammsaare tee 60 
Tallinn, 11316 



Küüni 5b 
Tartu, 51004 

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