Ethereum did not come into existence in a vacuum. It was one of many “Cryptocurrency 2.0” projects which were brewing up at the time.

Those influences were not only related to design or technical issues, but were social, with contributors within these other projects also being personally involved in the early development of Ethereum.

• Bitcoin
  • Bitcoin Magazine
  • Colored Coins
  • Dark Wallet and Amir Taaki
  • Factum
  • Hive Wallet
  • Mastercoin
• Open Transactions and Monetas