Quantum computing is the fusion of quantum physics and theoretical computer science that makes it more special and super faster than other traditional silicon-based computing systems. In this paper, we have designed quantum 2-qubit string, 4-qubit string, and n-qubit string comparators using the basic quantum operations such as AND, OR, NOT, and XOR that are based on quantum gates CNOT, V, and V+. The proposed quantum comparators take the advantage of basic quantum computing to perform parallel processing and super-fast calculations. This quantum technology is useful for cybersecurity, drug development, financial modeling, traffic optimization, weather f