Can Craft be used with conjunction with other framework (Laravel) or its a standalone solution?
Craft is frequently used in conjunction with other applications/frameworks. How one would use Craft in coordination with a Laravel application, and whether that would be a good idea, depends on the specific use case.
Most frequently, Craft is used to serve a content API that other applications can consume. Additionally, it's common to se Laravel apps used as an intermediary to broker integrations between the CMS and external services.
In any case, there's no specific technical limitation that would prevent Craft and Laravel from being used in conjunction with each other.