Multistable behavior typically refers to a system that has multiple stable states. To achieve multistability using speed feedback controller, we consider two different Lorenz and Rossler chaotic systems respectively and also find extreme multistability by considering identical coupled chaotic Chen system with mismatch parameters. Numerical simulation outcomes are explained to exhibit the functional capability of the recommended framework to create highly stable multi-state synchronization performance. This work displays a theoretical base for building utmost multistable system for continuous system.