DreamFactory
Turns any SQL/NoSQL/Structured data into Restful API.
form.io
A REST API building platform that utilizes a drag & drop form builder, and is application framework agnostic. Contains open source and enterprise version.
Fusio
Open-source API management platform which helps to build and manage REST APIs.
Graphweaver
Turn multiple data sources into a single GraphQL API.
Hasura
Fast, instant realtime GraphQL APIs on Postgres with fine grained access control, also trigger webhooks on database events.
Hoppscotch Community Edition
A free, fast and beautiful API request builder.
Kong
The World’s Most Popular Open Source Microservice API Gateway and Platform.
Lura
Open source High-Performance API Gateway.
Panora
An API to add an integration catalog to your SaaS product in minutes (alternative to Merge.dev).
Para
Flexible and modular backend framework/server for object persistence, API development and authentication.
Psychic
Universal API to connect large language models to dynamic data sources.
Svix
Open-source webhooks as a service that makes it super easy for API providers to send webhooks.
Tyk
Fast and scalable open source API Gateway. Out of the box, Tyk offers an API Management Platform with an API Gateway, API Analytics, Developer Portal and API Management Dashboard.
Yaade
Yaade is an open-source, self-hosted, collaborative API development environment.