Quicken and QuickBooks both are different accounting software having different features and functions. Quicken software is used for maintaining personal finances for the user and QuickBooks is used to manage the complex business activities of medium and small businesses. However, if required you can also convert Quicken to QuickBooks to get the better experience of the top-notch features of QuickBooks. For businesses that have to create and send a large number of invoices Quicken will not suit best in that case. And in that case, QuickBooks will be the best choice for the businesses. However, it is recommended that you must go through the functions and features of both the software before choosing the best option for your business. For any further query, we suggest you to get in touch with our experts.