Syscoin
Type
Stand-alone blockchain protocol with 2-way bridge for ERC-20 tokens and with ability to create custom blockchain-based tokens.
Tx Cost
0.0000582 SYS (0.00000464 USD as of 2021/01/15) for simple transaction (source).
Finality
10 seconds on first layer. 1 minute on second layer which ensures confirmation and conflict resolution.
Consensus
Syscoin has two consensus layers. In the first layer, Z-DAG (Zero-Confirmation Directed Acyclic Graph) is used to arrange transactions in order before being written to the blockchain. The second layer – Masternode – uses hybrid PoW/PoS model to confirm transactions, resolve conflicts and prevent double-spending.
$ Efficient
YES. Record 60158 TPS was achieved with only 24 masternodes (source). Low-end to mid-range HW is recommended for masternodes.
Max TPS
~61000 TPS across a worldwide network (source).