PTB Ventures

Joust, Inc. is a company based in Austin, Texas, that develops a real-time software platform designed for social competition. Founded in 2013, Joust connects users with their friends and engages them through a variety of interactive features, including challenges, contests, polls, surveys, predictions, and competitions across diverse topics such as sports, entertainment, and politics. The platform aims to foster social interaction and engagement by allowing users to share their interests and participate in friendly competition. Additionally, Joust provides business banking and merchant services tailored for the self-employed, utilizing a chartered community bank to address the financial needs of independent workers.

Learning Machine, established in 2017 and headquartered in New York, specializes in blockchain-based digital credentialing systems. It enables governments, companies, and educational institutions worldwide to create, issue, and manage secure, tamper-proof digital records using the Blockcerts open standard. The company's flagship product, the Learning Machine Federated Issuing System, facilitates large-scale issuance of blockchain records, empowering individuals with self-sovereign identity and streamlining processes like recruitment, enrollment, and credential verification. As of 2020, Learning Machine operates as a subsidiary of Hyland Software.

Element Inc., established in 2012 and based in New York, specializes in developing and distributing mobile-based software for biometric identity solutions. The company's platform enables various applications, including building immunization platforms, facilitating connected diagnostics, providing digital identities for healthcare providers, and enabling access to financial services. Element focuses on regions like Asia and Africa, where proper identification is often lacking, to promote inclusivity and sustainable development. The company was co-founded by Yann LeCun, a prominent figure in the deep learning field and current AI head at Facebook.

Callsign Ltd. is a UK-based company that specializes in creating an advanced online transaction platform focused on digital trust. The company leverages proprietary technology that mimics human identification to deliver secure and accurate user recognition. This AI-driven authentication platform enables businesses to identify genuine users with an impressive accuracy of 99.999%, effectively blocking malicious actors while maintaining user privacy and safety. Through its innovative solutions, Callsign enhances the user experience by allowing seamless access to services, even amidst potential cyber threats and data breaches. The company aims to underpin digital trust across various sectors, including financial institutions, government entities, and commerce globally.

DISC Holdings Limited is a company focused on developing mobile blockchain-based payment applications aimed at facilitating fiat transactions for unbanked and underbanked citizens in the United Kingdom. Founded in 2015 and based in Cobham, the company was previously known as GovCoin Limited before rebranding in January 2017. DISC Holdings specializes in creating a secure platform that enables the trusted exchange of data, thereby reducing costs and enhancing security. This platform empowers individuals to maintain control over the ownership and use of their transaction and identity information. As of June 2018, DISC Holdings operates as a subsidiary of Rivetz Corp.