Bitcoin Cash is a hard fork of Bitcoin with a protocol upgrade to fix on-chain capacity. Bitcoin Cash intends to be a Bitcoin without Segregated Witness (SegWit) as soft fork, where upgrades of the protocol are done mainly through hard forks and without changing the original economic rules of the Bitcoin. Bitcoin Cash (BCH) is released on 1st August 2017 as an upgraded version of the original Bitcoin Core software. The main upgrade is the increase in the block size limit from 1MB to 8MB. This effectively allows miners on the BCH chain to process up to 8 times more payments per second in comparison to Bitcoin. This makes for faster, cheaper transactions and a much smoother user experience. Why was Bitcoin Cash Created? The main objective of Bitcoin Cash is to to bring back the essential qualities of money inherent in the original Bitcoin software. Over the years, these qualities were filtered out of Bitcoin Core and progress was stifled by various people, organizations, and companies involved in Bitcoin protocol development. The result is that Bitcoin Core is currently unusable as money due to increasingly high fees per transactions and transfer times taking hours to complete. This is all because of the 1MB limitation of Bitcoin Core’s block size, causing it unable to accommodate to large number of transactions. Essentially Bitcoin Cash is a community-activated upgrade (otherwise known as a hard fork) of Bitcoin that increased the block size to 8MB, solving the scaling issues that plague Bitcoin Core today. Nov 16th 2018: A hashwar resulted in a split between Bitcoin SV and Bitcoin ABC
Zclassic is a fork of Zcash founded by Rhett Creighton but with the 20% founders’ reward and slow start removed. Miners are simply earning their fair reward, we believe they deserve it, and the coin development can be supported by the community. ZCL also differs from ZEC by removing the slow start (source), we are not trying to deliberately engineer scarcity: The Market decides the price. We are using the same parameters which were produced in the now famous secure 'trusted setup meeting' (source) where Peter Todd participated, and he confirmed to us (source) they are safe to use. If just one of the participants kept their key secret and destroyed it, the whole system is secure. Zcash is a cryptocurrency run by the Zero Coin Inc. In order to fund their operations, a 20% mining “Founder’s Reward” is included. Every block, in order to maintain consensus, miners running the Zcash code send 20% of their newly mined rewards to an address controlled by the Zero Coin Inc. Because the Zcash source code is open source, Zclassic simply removes the 20% Founder’s Reward. This gives people the option to mine a blockchain using the same technology of Zcash, but without paying the 20% Founder’s Reward. The mission of Zclassic is to stay as similar to Zcash from a technology perspective, but to never take any pre-mine, founder’s-reward or any other kind of fee that goes to a small group of individuals with special permissions whether elected, appointed, or otherwise.