SimpleSwap is an instant crypto swap service, running since 2018, that routes across 20+ centralized and decentralized providers. It lists 2,800+ cryptocurrencies on 100+ networks, with fixed and floating rates, no account for most swaps, and iOS/Android apps.
n.exchange is a non-custodial instant exchange operating since 2016, swapping 100+ crypto assets including BTC, ETH, stablecoins and XMR with an average delivery time of about 5 minutes. Also offers an API, widget and white-label service for businesses.