TOP Network is a decentralized open communication network that provides cloud communication services on the blockchain. TOP offers secure, low-cost services such as messaging, calling, video, VPN, CDN, IoT data sharing and more.

TOP Network is also a high-performance public blockchain platform designed to handle real-world business of any size or volume. Powered by innovations including three-layer network, two-layer sharding, two-layer lattice DAG and PBFT-DPoS*, TOP can process several hundred thousand transactions per second on the blockchain.

The long-term mission of TOP Network is to build a public blockchain infrastructure for all Dapps. Our world-class team of over 100 developers is striving for this goal.

TOP Network originated from the common underlying network layer of Dingtone, CoverMe and SkyVPN, three communication apps built by the TOP team before the blockchain project. These apps, having attracted over 50 million users in total, will be ported to TOP Network upon the launch of TOP and generate huge volumes of transactions in the TOP ecosystem.

TOP Network was founded by serial entrepreneur Steve Wei and his colleagues in late 2017. Steve was one of the earliest employees of WebEx in the 1990s. After WebEx, he founded a successful video conferencing software company which was acquired by Huawei in 2010. In 2012, Steve co-founded Dingtone, a public listed company operating popular communication apps such as Dingtone, CoverMe and SkyVPN.

TOP Network has closed $11 million early investments from prestigious institutional investors and individual billionaire investors, including DHVC, Fenbushi Capital, NEO Global Capital (NGC), Ontology Global Capital (OGC), LD Capital and more.

The communication services on TOP generate such high volumes of transactions that no existing public blockchain platforms in the market can handle it. TOP Network is designed to tackle the challenge with an innovative three-layered ledger architecture: the main chain, multiple service chains and trusted off-chain processors. The main chain manages the financial settlement but does not rely on service chains or participate in the transaction processing on any service chain. A service chain is designed to process a specific type of business and can choose any consensus mechanism and data structure according to the type of business. The off-chain processors handle and store business data on the off-chain network to reduce the amount and frequency of data processed and stored on the chain.

By taking advantage of both directed acyclic graph (DAG) data structure and block data structure, TOP Network uses unit lattice data structure to organize transactions and block lattice data structure to synchronize account states, significantly improving the transaction processing capacity. This dual lattice architecture is one of the key technologies to achieve fast confirmation of transactions and efficient cross-shard and cross-zone state synchronization. TOP offers two types of smart contracts — Platform Contracts and Service Contracts, to deploy more flexible and secure smart contracts on TOP. TOP is far more decentralized compared with other DAG-based public blockchain platforms like IOTA.

In the traditional DPoS consensus mechanism, consensus nodes are selected based solely on their stake, or the size of their assets. The stake defined on TOP Network, called Comprehensive Stake, combines multiple factors including asset stake, accumulated reputation, computing power and so on. TOP uses a VRF algorithm to elect the final consensus nodes with the highest comprehensive stake, and the consensus nodes execute PBFT algorithm to validate transactions and produce blocks. Constructed on a completely permissionless network, TOP is more decentralized and secure in contrast to permissioned networks like EOS, a semi-decentralized blockchain platform where only a few supernodes participate in the consensus process.

TOP Network officially launched Testnet at Stanford University in October 2018. TOP Mainnet is scheduled to come out by the end of Q2 this year according to its white paper.

TOP founding team has over 20 years of hands-on development experience in the communications industry. Steve Wei, co-founder and CEO of TOP Network, graduated from Tsinghua University and has successfully founded four startups. A founding employee at WebEx, Steve held multiple key positions at WebEx from 1996 to 2003. In 2014, Steve founded Cenwave Communications, a video conferencing software company successfully sold to Huawei in 2010. In 2012, Steve founded Dingtone, which operates communications apps that altogether have attracted more than 60 million users overseas. TOP core technical team, early employees of WebEx, Fortinet and Cloud.com with extensive successful startup experience, are experts in communications, encryption, cloud computing and cybersecurity.

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