There are other services that do push notifications - most notably, Amazon Pinpoint (for the analytics driven type user segmentation and campaigns) and SNS (for

There are other services that do push notifications - most notably, Amazon Pinpoint (for the analytics driven type user segmentation and campaigns) and SNS (for the more automated single push). Similarly, look to Amazon Cognito for user sign-in / sign-up / etc., AWS Lambda and API Gateway for cloud-based API, and other services for machine-learnign, AI, chatbots, database services, analytics, etc. AWS AppSync is only for the data access / offline / real-time component.