Uniswap is a 2018 released exchange that is ethereum cryptocurrency ledger based with an automated token facility, it is headquartered in USA.
It uses a not complex smart contract interface for swapping, a formalized model for pooling liquidity reserves, an open source frontend interface for traders and liquidity providers and a free and decentralized asset exchange assurance.
Uniswap charges flat fees of 0.30% for trading and charges a competitive withdrawal fees based on network alone.
It doesn't accept fiat deposit and it is well secured in terms of security as it is decentralized.
Uniswap is an exchange with wide variety of cryptos to swap and trade, I advice you see it out.