Quant Network Joins INTEROPen | 13 Dec 2018 | London


Quant Network’s blockchain operating system, Overledger, has the ability to interconnect existing legacy systems to one another as well as to blockchain.

Quant Network, an innovative technology company, today announced that it has joined INTEROPen to accelerate the development of open standards for interoperability in the UK health and social care sector.

The health and social care sector is notorious for holding vital information on different systems that cannot communicate with one another, negatively impacting patient care and user experience. As a member of INTEROpen, Quant Network will collaborate on the design and application of technical interoperability standards, covering areas such as data exchange, data validation, defining APIs and governance. Quant Network’s blockchain operating system, Overledger, has the ability to interconnect existing legacy systems to one another as well as to blockchain. The origin of the idea for Overledger stemmed from the founder’s time in Healthcare faced with solving the same challenges.

Gilbert Verdian, Founder and CEO of Quant Network, stated that “Quant Network is pleased to be collaborating with INTEROPen. With the increased stress on health services in the UK, we believe that digital transformation is needed now more than ever. Our Overledger operating system can reduce the risks and costs involved in digital transformation with minimal disruption to patients. We are also excited about the opportunities for blockchain adoption that may come from our involvement with INTEROPen.”

Lara Verdian, Head of Healthcare services for Quant Network and Health Economist additionally noted that “it is estimated by the OECD that approximately one fifth of healthcare expenditure is wasted. Digital transformation and interoperability enabled by technical standards and blockchain technology is expected to significantly reduce this wastage, and ultimately lead to better health outcomes for patients.”


Overledger 2.x

Overledger 1.x


OAuth 2.0 standard (allowing SSO)

Proprietary (BPI Keys)


In API, seamless updates

In SDK, re-download for updates


Full abstraction across all DLTs

Partial, DLT-specific edge cases

RCG Framework

REST / JSON APIs from OVL Core

Proprietary P2P (experimental)

Time to Deploy

32 minutes (CI / CD pipelines)

1-2 weeks

QNT Utility Token / Treasury

Optimised, audited smart contracts

Experimental smart contracts


Optimised to scale fast – 23 Microservices

Hardened proof of concept
– 9 Microservices

Transaction Routing Algorithm

6 factor, game theory optimised

Experimental P2P emergent


Cloud native (scaling / resilience)

Standalone DB deployments

Cross-DLT Implementation

REST API calls direct to OVL, integrated smart contract back end

SDK-based Javascript 
apps call smart contract functions
via OVL

2021 Achievements

50% Quant team has grown by over 50% and will continue to do so 

OVL1.0 to 2.0 Release schedule accelerated, moved to much more frequent automated updates
– Previously, last major update was seven months, then in early 2021 moved to three months (Jan and March)
and then to monthly (April and May). We’re now moving to fortnightly releases. 

2.5X Overledger is now 2.5x bigger (April)  

2.0 Re-engineered the entire 2.0 architecture

Open API 3.0 for easy integration into developer workflows

OAuth 2.0 for single sign on for enterprise customers    

Cloud Native Scalable and resilient already, now deployable automatically 

Native Transactions 

OVL 2.0 Developer portal 2.0