Update: It seems like the CoinMex exchange shut down, possibly exit scammed.
CoinMex provides access to BTC, ETH, USDT and NEO markets. The company was incorporated under the legislation of the Republic of Seychelles in 2018 and is affiliated with NEWEX Technology Co. Ltd. CoinMex is focused on the Chinese market.
Vertex.Market is a peer-to-peer cryptocurrency marketplace created by a team of crypto enthusiasts trying to solve one of the biggest hurdles in the crypto world, cashing out (and in) your funds.