DEMOS comes from ancient Greek, meaning democracy, and also means collective. DEMOS is mainly to provide help for more and more public chains. In the process of helping, they gather public chains.
YGGDRASH is a trust-based multi-dimensional blockchains (branches) built with a vision “Digitize everything into reality” and to connect everything and any blockchain networks. YGGDRASH’s main-net is called STEM, and its cryptocurrency is YEED. It is a trust-based blockchain ecosystem where each branch is governed by reputation to ensure integrity.