Hasura vs OpenAPI Generator

Hasura is a hybrid API platform that generates data APIs over connected databases, so developers do not need to write handlers, schemas, or resolvers. Hasura Cloud plans provide instant GraphQL APIs, RESTified endpoints, and GraphQL subscriptions. Listed database sources include Postgres-compatible systems, Microsoft SQL Server, BigQuery, Amazon Athena, Snowflake, MySQL, Oracle, MariaDB, MongoDB, and ClickHouse. APIs can be extended with remote schemas, remote joins, Actions, and event or scheduled triggers. Authorization can use an authentication provider of the customer’s choice, with JWT controls through headers, cookies, or webhooks. Cloud hosting is available on AWS, Google Cloud Platform, and Microsoft Azure Cloud. The Community Edition can run from a Docker image, while Enterprise Edition supports on-premises deployment. Hasura Cloud also lists GitHub, observability integrations, query allow lists, access controls, and DDoS monitoring. Plans include a free tier and paid options.

OpenAPI Generator produces API clients, server stubs, and documentation from OpenAPI 2.0 and 3.x documents. It offers more than 50 client generators and server stub generation for over 40 languages and technologies, including Java, Kotlin, Go, and PHP. Other outputs include Apache2 configuration, MySQL, GraphQL schemas, and formats such as HTML and Cwiki. It can also convert OpenAPI 2.0 documents into OpenAPI 3.x JSON or YAML. Generated output can be adapted with Mustache templates, configuration-provided files and extensions, or custom generators. Installation choices include npm, Homebrew, Scoop, PyPI, Docker, JAR, JBang, and a Bash launcher. The project documents Gradle, Maven, sbt, Bazel, GitHub, and CI/CD integrations. Supported operating systems include Linux, macOS, and Windows, though installer availability varies by system. The JAR option requires Java 11 or later. The project is free and describes a Slack community for questions and guidance.