Thanks a lot for the shoutout, bh13731. The sunset of Parse and the rise of GraphQL was indeed one of the reasons for us to start working on Graphcool. We have a lot of customers who migrated from Parse to our platform which was a good usability benchmark for us.
In general GraphQL provides many advantages over a traditional REST like API provided by most BaaS. It frees you from the need for proprietary SDKs and reduces vendor lock-in.
Here is a quick way how you can get started: https://www.graph.cool/docs/quickstart