Huginn is an open-source automation platform that runs agents to monitor web data, process events, and trigger actions — self-hosted and extensible.

49.9k stars4.3k forksMITlast commit Actively maintained
Enterprise integration and API management platform for designing, building, deploying and managing APIs and integrations across cloud and on-premises systems. Provides iPaaS connectivity and connectors, API gateway, lifecycle management, runtime deployment and monitoring.
Huginn is an open-source automation platform that runs agents to monitor web data, process events, and trigger actions — self-hosted and extensible.

49.9k stars4.3k forksMITlast commit Actively maintained
Kong Gateway is a high-performance, cloud-native API gateway for routing, securing, and observing API traffic, with an extensible plugin system and Kubernetes support.

44k stars5.2k forksApache-2.0last commit Actively maintained
Hasura is an open-source GraphQL engine that instantly exposes realtime, secure GraphQL APIs over databases and other data sources with fine-grained access control.

32.1k stars3k forksApache-2.0last commit Actively maintained
Declarative, API-first orchestration platform for scheduled and event-driven workflows with a plugin ecosystem, UI editor, CI/CD and Terraform integration.

27.9k stars2.9k forksApache-2.0last commit Actively maintained
Open-source, browser-based low-code platform and Node.js runtime for wiring devices, APIs and services into event-driven flows for automation, IoT and integrations.

23.6k stars3.9k forksApache-2.0last commit Actively maintained
Lura is a stateless, high-performance API gateway framework for building reverse proxies that aggregate, transform, and secure backend APIs via middleware and plugins.

6.8k stars582 forkslast commit Actively maintained
Open-source API gateway for securing, aggregating, and transforming microservice APIs with a stateless, high-throughput Go-based runtime and declarative configuration.

2.7k stars499 forksApache-2.0last commit Actively maintained
Fusio is an open source API management platform for building, securing, and operating REST APIs, with a web backend, developer portal, and SDK generation.

2.1k stars243 forksApache-2.0last commit Actively maintained
DreamFactory generates secure, documented REST APIs for SQL/NoSQL databases and other services, with a web admin UI, authentication, and role-based access control.

1.8k stars354 forksApache-2.0last commit Actively maintained
Automates purchase order ingestion, validation, and ERP posting for distributors, manufacturers and wholesalers using AI-driven item matching and configurable workflows.

1k stars200 forksAGPL-3.0last commit Slowing down
Graphweaver turns multiple databases and APIs into a single, code-first GraphQL API with an extensible admin UI and fine-grained access control.
553 stars32 forkslast commit Actively maintained
Apache Flink is a distributed engine for stateful stream processing and batch analytics with event-time semantics, fault tolerance, and scalable deployment on clusters.

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Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 10 of 12 shipped a commit in the last six months. Licences in this list: MIT, Apache-2.0, AGPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in API Development, Mocking & Testing.