We do provide a custom level service for Magento 1 to 2 Migration. We use the native Magento Migration tool to handle data level migration, If your Magento 1 store has premium add-ons then we will help you find out the same functional modules for the latest Magento 2 version. If there is any custom coding involved with your Magento 1 version then it can be developed into a separate module for Magento version 2 and properly tested both functionally and with Magento coding standard.
After the complete test and validation of the entire website on the staging environment client can undergo the end-user acceptance by testing the website comparable to their old-website. We also provide a flexible approach so that our client can choose additional features to get included before taking the website live.