Grin coin is a private & lightweight open source project based on the mimblewimble blockchain implementation. MimbleWimble is a lightweight blockchain protocol proposed by anonymous author that goes by the name Tom Elvis Jedusor (inspired by Harry Potter) in July 2016. Since then, the proposal has gained a huge following among Bitcoin and privacy advocates. Unlike bitcoin or ethereum, there are no addresses in Grin. In order to transact using Grin, both wallets must communicate with each other online with the results broadcasted to the network. Another key different is that transaction history (sender, receiver, amount) will not be recorded on the blockchain. Due to the removal of these information from the transaction, the data size remains small and that keeps the blockchain lightweight. New nodes can easily join the network without having to download a large blockchain. Grin coin was launched without an ICO, fundraising, or pre-mine. Developers around the world contribute openly with the goal to ensure the coin distribution remains as fair as possible. There are 2 popular wallets widely available to interact with the Grin network. Grin core wallet: https://www.coingecko.com/buzz/how-to-use-grin-wallet-to-send-receive-grin-coins Wallet713: https://www.coingecko.com/buzz/how-to-use-grin-wallet713-to-send-and-receive-grin-coin-step-by-step-guide The consensus algorithm used by Grin is the Cuckoo Cycle proof-of-work based. There are 2 hashing algorithms involved with Grin. Cuckoo-29 is meant for GPU mining while Cuckoo-31 is meant fo ASIC mining. This is a deliberate design to encourage miners to eventually move into ASIC mining for efficiency while keeping it fair at the beginning of the launch. Grin coin has launched its mainnet on 15th January 2019 and is now available for mining and trading.
Factom is the first usable blockchain technology to solve real-world business problems by providing an unalterable record-keeping system. By creating a data layer on top of the Bitcoin blockchain, Factom’s distributed ledger technology secures millions of real-time records in the blockchain with a single hash using cryptographic isolation. Businesses and governments alike can use Factom to document their information so that it cannot be modified, deleted or backdated. Factom’s technology decentralizes record keeping by ensuring that the integrity of stored data remains intact, providing complete transparency, while at the same time maintaining user privacy in an increasingly digital world. The Factom project began in 2014 which puts it on the older end of the blockchain spectrum. The team has made steady progress since then. They released the first version of Factom in early 2015 and had their token sale in the middle of that year. In August of 2015, they were accepted into the Plug and Play FinTech accelerator and were chosen as one of Austin’s A-List start-ups in May 2016. Based out of Austin, TX, the core team has multiple members with several years of experience in the blockchain space. Peter Kirby, Factom Co-founder and CEO, and Abhi Dobhal, VP Product Management, previously worked together at CoinTerra, Inc – a producer of ASIC miners for Bitcoin. The price of a Factoid is directly tied to the amount of network usage. As more businesses join the network, it will become more costly to submit Entries which will, in turn, affect the Factoid price. Once the number of Factoids being burned outpaces the 73,000 that are created each month, the currency will become deflationary. This may drive the price up even further.