Hasura GraphQL Engine

Hasura is an open-source platform that instantly generates production-ready GraphQL APIs from PostgreSQL and other databases, eliminating the need to write backend boilerplate. Founded in 2017 by Tanmai Gopal (CEO) and Rajoshi Ghosh (COO), Hasura is headquartered in San Francisco and Bangalore, India. The company has raised $99.5 million in Series C funding from investors including Greenoaks Capital, Nexus Venture Partners, and Vertex Ventures. Key features: instant GraphQL API: connect a PostgreSQL database and Hasura automatically introspects the schema, generating a full GraphQL API with queries, mutations, and subscriptions for every table, view, and relationship. No schema definitions or resolvers to write manually. Real-time subscriptions: GraphQL subscriptions over WebSocket push data changes to clients in real-time. Ideal for dashboards, chat applications, and live feeds. Relationships: define object and array relationships between tables (foreign keys are auto-detected), and Hasura generates nested GraphQL queries that join data across tables. Permissions: granular, role-based authorization at the row and column level. Rules are defined in the Hasura console using database session variables (e.g., user_id from JWT). Remote schemas: merge external GraphQL services into the Hasura API. Actions: write custom business logic in REST endpoints and expose them as GraphQL mutations. Event triggers: listen to database changes (insert, update, delete) and trigger webhooks for async processing. Scheduled triggers: run events on a cron schedule. Multiple data sources: connect to PostgreSQL, MS SQL Server, BigQuery, Snowflake, and more. Hasura Cloud: managed deployment with scaling and monitoring. Haskell/Go. Apache-2.0.