Hasura is a GraphQL layer for the database. It introspects a PostgreSQL database and creates a GraphQL API which exposes access/operations to the database.

Prisma is a toolkit that consists of a database client (Prisma Client), a migrations tool (Prisma Migrate), and a database IDE/UI (Prisma Studio). The generated Prisma Client is in TypeScript and can be imported into a Node.js application.

While Prisma can be used to build a GraphQL API that connects to a database, Prisma is completely agnostic to the GraphQL tools you use. (https://www.prisma.io/docs/understand-prisma/prisma-in-your-...)