AdEx (ADX) stands for “advertising exchange.” AdEx Coin is a blockchain-based marketplace for ads that aims to change the existing online advertising landscape and solve its major problems: ad fraud, privacy and consent to receive sponsored messages, etc. AdEx is fully transparent and built on the Ethereum Smart Contracts. AdEx is still in development, so it’s difficult to say much yet about it at this point. The original roadmap anticipated a beta release in February 2018. It remains to be seen if the team will meet that deadline. Future plans for version two of AdEx after launch focus on improving the user experience and scalability. AdEx has also expressed an interest in implementing a real-time bidding solution that could take place off-chain or on a high throughput network, like IOTA. AdEx raised $10 million in the first three hours of token sale. AdEx as a platform has room for a good amount of growth since digital advertising is a booming business anyway. But by eliminating flaws and continuing updates on its current platform, AdEx aims to stand firm in the near future.
Zen is a decentralized financial platform, built from scratch with the goal of providing people with a secure, scalable and useful infrastructure for creating their own financial instruments, and trading them directly without intermediaries.The Zen blockchain is secured by multiple proof-of-work algorithms, with token-holder voting on the balance between them. Multi-hash mining creates robust incentives for miners to deliver efficient, reliable security.Zen smart contracts are written and secured by a subset of the F* functional programming language, allowing users to: A) Prove the amount of resources a contract will consume and provide the necessary fees for running the contract to miners, removing the need for a “gas” based system.B) Prove their contracts meet a given specification, meaning they can prove the contract will definitely do (or not do) something given a specific set of parameters.The Zen platform comes with a built-in solution for oracles, which provide contracts with useful real world data.Finally, Zen is integrated with the Bitcoin blockchain, allowing contracts to observe and respond to native bitcoin transactions