Does the Lightning network use blockchain?
Is Lightning network still blockchain technology or not anymore?
The Lightning Network is a protocol that builds on top of a blockchain and uses cryptography to allow value to be transferred between untrusted parties outside of the blockchain, giving these value transfers the ability to handle increased capacity. But the Lightning network is built on top of a blockchain (hence it's known as a "layer 2" solution) because the value transferred in the network is funded by and settled to the originating blockchain.
For more information check out this talk announcing the lightning network