Olymp Capital and others invested in Berlin-based YEAY GmbH, which makes a recommendation app that provides a word-of-mouth marketing blockchain protocol.

Yeay's WOM Token Ltd. provides a monetization platform for word-of-mouth recommendations.

Olymp, which invests in blockchain and crypto assets, was joined in the fundraising by Advanced Blockchain AG, Nakamoto and San Francisco-based private equity firm West.

A WOM Token private sale is currently open, and a Dutch auction token-generation event will be held in the first quarter of 2019 to sell 350 million of 1 billion tokens.