There are over 1565 cryptocurrencies as of April 2018 according to Wikipedia.

Bellow is the list of the most popular cryptocurrencies by capitalization (data collected in August 2018).

 

Bitcoin

Bitcoin is the first cryptocurrency created by Satoshi Nakamoto in 2009. Since it’s creation Bitcoin became the most well-known cryptocurrency.

Bitcoin market cap: $120 755 524 645.

Ethereum

Unlike some cryptocurrencies on this list, Ethereum is not a fork of Bitcoin but a completely independent blockchain that supports smart contracts – self-executable programmable contracts that allowed ICOs to become so popular.

Ethereum market cap: $41 088 067 093.

Ripple

Ripple was created to offer better scalability compared to BTC or ETH and can be used for cross-border financial transactions. It also offers a blockchain platform similar to Ethereum.

Ripple market cap: $16 808 975 662.

Bitcoin Cash

Another popular Bitcoin hard fork, created to improve the scalability issues of Bitcoin. Bitcoin Cash market cap: $12 053 543 799

EOS

EOS was created to replace Ethereum offering faster transactions and better scalability. According to the plans of EOS creators, it will replace Ethereum as the main blockchain platform to be used by emerging blockchain projects.

EOS market cap: $6 355 940 871

Litecoin

Litecoin is also a fork of Bitcoin designed for faster transaction processing. Compared to Bitcoin Cash, Litecoin shares more similarities with Bitcoin.

Litecoin market cap: $4 307 984 341.

Cardano

Cardano is a cryptocurrency that is similar to EOS – it is created to replace Ethereum. However, Cardano is designed with regulatory compliance in mind from the get-go.

Cardano market cap: $3 362 728 310.

Stellar

Stellar is a blend between Ripple and Ethereum created to power cheaper cross-border payments and allow companies to host ICO’s based on its blockchain.

Stella market cap: $4 564 193 811.

 

Other popular cryptocurrencies

IOTA, market capitalization – $2 534 342 361;

Tether, market capitalization – $2 438 968 307;

Tron, market capitalization – $1 953 068 711;

Monero, market capitalization – $1 889 686 896;

NEO, market capitalization – $1 768 720 848;

Ethereum Classic, market capitalization – $1 727 850 665;

Dash, market capitalization – $1 684 401 894;

NEM, market capitalization – $1 310 591 679;

Binance Coin, market capitalization – $1 287 958 952;

Tezos, market capitalization – $1 130 235 082;

Zcash, market capitalization – $803 803 662    ;

OmiseGO, market capitalization – $758 026 724;

VeChain, market capitalization – $750 746 427;

Qtum, market capitalization – $569 463 741;

0x, market capitalization – $514 305 045;

Zilliqa, market capitalization – $431 023 591

Bytecoin, market capitalization – $429 119 174;

Bitcoin Gold, market capitalization –    $427 933 031;

Lisk, market capitalization – $425 665 107;

BitShares, market capitalization – $417 750 956;

Decred, market capitalization – $411 605 986;

Aeternity, market capitalization – $392 622 795;

Data from coinmarketcap.com