Bitcoin, Litecoin, ZCash, Primecoin, Monero, Vertcoin

Less opportunity for 51% attack Better Security

Greater energy consumption Centralization of Miners

Competitive ConsensusWebpage: SAINI

Ethereum, Dash, Peercoin, Decred, Reddcoin, PivX

• Energy efficient Webpage: SAINI
• More expensive to attack for attackers Webpage: SAINI
• Not susceptible to economies of scale Webpage: SAINI

• nothing-at-stake problem Webpage: SAINI

Competitive Consensus Webpage: SAINI

• Steem, EOS, and BitShares Webpage: BHARDWAJ
• BitShares, Steemit, EOS, Lisk, Ark Webpage: SAINI

• Energy efficient. Webpage: SAINI
• Fast. Steemit, a high traffic blogging site uses it. EOS has a block-time of 0.5 sec. Webpage: SAINI

• A bit centralized.Webpage: SAINI
• Participants with high stakes can vote themselves in to become a validator. Something which is seen recently in EOS.Webpage: SAINI

Collaborative consensusWebpage: SAINI

Waves

Hyperledger Sawtooth, Resource-Efficient Mining (REM)

Stellar, Ripple, Hyperledger FabricWebpage: BHARDWAJ

Chain

NEO Webpage: BHARDWAJ

Iota, Hedera Hashgraph Webpage: BHARDWAJ

• Espers and Decred Webpage: BHARDWAJ
• Decred Webpage: SAINI

Collaborative consensusWebpage: SAINI

NEM

Burstcoin and SpaceMint Webpage: BHARDWAJ

• Similar to PoW but uses space instead of computation. Thus much environmental friendly.
• Can be used for malware detection, by determining whether the L1 cache of a processor is empty (e.g., has enough space to evaluate the PoSpace routine without cache misses) or contains a routine that resisted being evicted.
• Can be used for anti-spam measures and denial of service attack prevention.
• PoC can use any regular hard drives including those with Android-based systems.
• It is reportedly up to 30-times more energy efficient than the ASIC-based mining of the bitcoin cryptocurrency.
• There is no need for dedicated hardware or constant upgrading of hard drives.
• Mining data can be easily wiped-off and the drive can be reused for any other data storage purpose.

https://www.investopedia.com/terms/p/proof-capacity-cryptocurrency.asp

• Not many developers have adopted the system.
• It is possible for malware to affect mining activities.
• Widespread adoption of PoC could start an “arms race” to produce higher capacity hard drives.

https://www.investopedia.com/terms/p/proof-capacity-cryptocurrency.asp

Collaborative consensusWebpage: SAINI

Slim Coin Webpage: BHARDWAJ

Algorand, Filecoin, Chia

• Energy efficient.Webpage: SAINI
• Highly Customisable and scalable.Webpage: SAINI

• Incentivization can be hard.Webpage: SAINI

Competitive consensus Webpage: SAINI