Best Self-hosted API Development & Testing
A curated collection of the best self-hosted aPI Development & Testing tools help developers design, simulate, test, document, and monitor APIs throughout their lifecycle—ensuring reliability, performance, and consistency across systems and clients.

Supabase
Build scalable apps with Postgres database, authentication, instant APIs, and more
Alternative to:



Firebase

PlanetScale

AppWrite
Build scalable apps with Postgres database, authentication, instant APIs, and more
Stars
83,750Forks
8,781Last commit
13 hours ago

Hoppscotch
Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface.
Alternative to:


Postman

Testfully
Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface.
Stars
71,923Forks
4,941Last commit
21 hours ago
Ad


Strapi
A powerful headless CMS that enables developers to build, deploy, and manage content-rich applications with customizable APIs and a user-friendly admin panel.
Alternative to:


Contentful

Sanity
A powerful headless CMS that enables developers to build, deploy, and manage content-rich applications with customizable APIs and a user-friendly admin panel.
Stars
66,841Forks
8,594Last commit
1 day ago

PocketBase
Realtime database, authentication, file storage and admin dashboard for your next app
Alternative to:




Supabase

Firebase

AppWrite

Nhost
Realtime database, authentication, file storage and admin dashboard for your next app
Stars
47,551Forks
2,364Last commit
8 days ago

NocoDB
Transform any MySQL, PostgreSQL, or SQLite into a smart spreadsheet interface with APIs, automations, and integrations.
Alternative to:




Retool

Airplane

Airtable

Softr
Transform any MySQL, PostgreSQL, or SQLite into a smart spreadsheet interface with APIs, automations, and integrations.
Stars
54,669Forks
3,904Last commit
4 hours ago

Appwrite
Appwrite offers a comprehensive backend solution with authentication, databases, storage, and more, empowering developers to build robust applications efficiently.
Alternative to:




Retool

Supabase

Firebase

Airplane
Appwrite offers a comprehensive backend solution with authentication, databases, storage, and more, empowering developers to build robust applications efficiently.
Stars
50,623Forks
4,427Last commit
9 hours ago

Novu
Novu provides a unified API for sending notifications across multiple channels, with powerful workflows and integrations.
Alternative to:


Customer.io

Knock
Novu provides a unified API for sending notifications across multiple channels, with powerful workflows and integrations.
Stars
37,016Forks
4,026Last commit
19 hours ago

Appsmith
Appsmith is an open-source low-code platform that enables developers to rapidly build and deploy custom internal tools and applications.
Alternative to:




Retool

Airplane

Make

Power Apps
Appsmith is an open-source low-code platform that enables developers to rapidly build and deploy custom internal tools and applications.
Stars
37,116Forks
4,072Last commit
2 days ago

Bruno
A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.
Alternative to:


Postman

Testfully
A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.
Stars
34,630Forks
1,647Last commit
1 day ago

Insomnia
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.
Alternative to:


Postman

Testfully
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.
Stars
36,472Forks
2,075Last commit
1 day ago

HTTPie
Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.
Alternative to:


Postman

Testfully
Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.
Stars
35,739Forks
3,724Last commit
6 months ago

Directus
A versatile headless CMS and API engine that simplifies data management, content creation, and application development.
Alternative to:



WordPress

Contentful

Sanity
A versatile headless CMS and API engine that simplifies data management, content creation, and application development.
Stars
30,763Forks
4,225Last commit
2 days ago

Hyperswitch
A unified payment infrastructure that connects multiple payment processors through a single API integration, enabling global payment processing
Alternative to:


Stripe Billing

PayPal Braintree
A unified payment infrastructure that connects multiple payment processors through a single API integration, enabling global payment processing
Stars
20,212Forks
3,259Last commit
4 hours ago

Saleor
Headless, API-first e-commerce solution with powerful features for customization, scalability, and seamless integration across channels.
Alternative to:





Sellfy

BigCommerce

Magento

Shopify

WooCommerce
Headless, API-first e-commerce solution with powerful features for customization, scalability, and seamless integration across channels.
Stars
21,627Forks
5,705Last commit
2 days ago