Email Studio is a Salesforce email marketing tool that allows users to create, send, and track personalized email campaigns and mass communications1. Email Studio also provides features such as email scoring, which measures the engagement level of each email recipient based on their actions, such as opening, clicking, or unsubscribing2. Salesforce Inbox is a Salesforce tool that integrates email applications such as Outlook with Salesforce, allowing users to access CRM data and features from their email inbox3. Salesforce Inbox also enables users to send emails from their Outlook account or from Salesforce using branded email templates4.
Account Engagement is a Salesforce tool that provides insights and recommendations for sales reps to engage with their accounts based on AI analysis of email activity, web activity, and CRM data5. However, Account Engagement is not an email marketing tool that can score email activity from campaigns and mass communications. Salesforce Engage is a Salesforce tool that allows users to create personalized email campaigns using Marketing Cloud templates and track the responses in real time6. However, Salesforce Engage does not integrate with Outlook or allow users to send emails from their email inbox.
Reference:
1: Email Studio Overview - Salesforce
2: Email Scoring Basics - Salesforce
3: Salesforce Inbox Overview - Salesforce
4: Use Email Templates in Inbox - Salesforce
5: Account Engagement Overview - Salesforce
6: Engage Campaigns Overview - Salesforce