SendGrid is a cloud-based email service provider that allows businesses and organizations to send and manage transactional and marketing emails. It was founded in 2009 and acquired by Twilio in 2018.

SendGrid offers a range of services for email management, including email delivery, email marketing campaigns, transactional email management, email API integration, email analytics and reporting, email templates, and list management.

With SendGrid, businesses can send large volumes of emails reliably and securely, as well as track email engagement metrics such as open rates, click-through rates, and unsubscribe rates.

The items on a SendGrid invoice typically include the monthly subscription fee, any overage charges for exceeding the allotted email sending limit, any fees for additional services or features used, such as email templates or email validation services, and any taxes or surcharges that may apply. Additionally, the invoice may include information about the customer account, such as the account ID and billing information.