Nebulas (NAS) coin is based on its own blockchain and functions as the native utility token of the Nebulas system. This cryptocurrency is featured by the number of exchanges.
Stellar is an open-source cryptocurrency network launched by non-profit Stellar Development Foundation. The currency itself is called Lumen (XLM). Some experts note that this asset has similarities with Ripple because of its quick and cheap transactions.
The Stellar network is guarded by the special contract that doesn't temporarily allow holders of big amounts of Lumen to sell it. Stellar works as an exchange platform where Lumen is used to pay a small exchange fee. The project has a high level of decentralization and provides equality for all of its participants. It has one of the biggest market capitalizations.