Are Salesforce and NetSuite similar?

No, Salesforce and NetSuite are not similar. They both offer CRM (customer relationship management) however NetSuite also has ERP (enterprise resource planning) functionality. 

Salesforce is a cloud-based CRM solution that offers features such as sales force automation, marketing automation, and customer service. NetSuite is a comprehensive, cloud-based ERP solution that offers a wide range of features and functionality for businesses of all sizes.