Amazon SES is primarily used for sending high-volume emails, including transactional and marketing emails.
Amazon SNS allows publishing messages to many subscribers, mainly for system-to-system notifications.
Amazon Pinpoint is designed for engaging customers across multiple channels (email, SMS, push notifications) for marketing and transactional messaging.
While Amazon SES and Amazon SNS have limited audience targeting and personalization features, Amazon Pinpoint offers detailed audience segmentation, message personalization, and event-triggered messaging capabilities.