Qtum is a decentralized and open-source smart contracts platform and value transfer protocol. Qtum uses proof-of-stake consensus, meaning node operators are rewarded for validating transactions. It is a DGP governed blockchain where community participants can vote to change certain network parameters. Qtum is built on a bitcoin core fork, but the foundation has created its own hybrid blockchain with the help of several key tools. The coin uses bitcoin’s chain because of its simple and stable nature, allowing the foundation to build upon it more easily. As the QTUM project is a hybrid of Bitcoin and Ethereum, its team comprises of members from both Bitcoin and Ethereum community. They also have team members who formerly worked with Tencent, Alibaba, Nasdaq etc. Apart from that, they are backed by some notable VCs and prominent people from the Blockchain community such as Patrick Dai (Project Co-Founder), Neil Mahi (Chief Blockchain Architect/Co-Founder) and Jordan Earls (Lead Developer/Co-Founder). Qtum provides a Turing-complete blockchain stack and is able to execute smart contracts and decentralised applications like the Ethereum blockchain. Qtum builds on Bitcoin's UTXO transaction model and uses the Proof-of-Stake algorithm. It is backed by some highly prominent members of the blockchain community such as Anthony Di Iorio, Xu Star, Bo Shen, David Lee, Jehan Chu and Roger Ver. Qtum sold over 10 million dollars’ worth of its tokens after only 90 minutes, eventually raising a total value of $15.7 million before stopping the campaign early after only 5 days. They raised a total amount of 11,156.766 bitcoins (BTC) and 77,081.031 ether (ETH) in exchange for the 51 million Qtum tokens being distributed to the public. In Qtum’s whitepaper, 51% of the coins were distributed to the public via the crowdfunding campaign. Of the remaining 49%, 29% of the coins would be allocated as community incentives, and the remaining 20% would be distributed to the early backers and development team.
Tripio is the first travel marketplace based on the blockchain. It leverages the decentralized network provided by blockchain technologies to directly connect global customers and service providers. Moreover, it builds a service ecosystem based on transparent, tamper-resistant trust and incentives. The blockchain technologies Tripio leverages help reduce transactional and operational costs in travel industries, as well as improve customer experience in their respective products and services. On the Tripio platform, a service provider can publish her unique service terms and conditions using smart contracts. From the moment a purchase initiates to the end of the travel, every step along the way can be enforced and monitored by smart contracts. Should disputes arise, Tripio provides dispute resolution by means of community selfgovernment mechanisms. Tripio comprises of its dApps and a set of Tripio Protocols that forms the basis of the new ecosystem. The Tripio dApp and the Tripio Protocals are powered by the ERC-20 utility token called the TRIO token. Customers may use Tripio dApps directly. At the same, any third-party may build its own dApp by leveraging the open Ethereum protocols.