Ethereum, which has many nodes, about 100000, that ensure continuity and safety in numbers.

LTO Network, a hybrid blockchain, built for business, fast and GDPR compliant.

IBM’s Hyperledger: this blockchain is more closed, with less nodes, but more control over the network.

DigiByte, a very well known blockchain with great community support, a high node count and one of the most decentralized UTXO's .

Bitcoin, the most well known blockchain, with estimates of over 200000 nodes around the world.