Best API Developer Tools & Git for self-hosting

Open-source API development ecosystem

Replaces Postman, Insomnia

Full fake REST API from a JSON file in seconds

Replaces Mockoon, Postman Mock

Leading open-source headless CMS

Replaces Contentful

Open-source Airtable alternative

Replaces Airtable

Build and share machine learning web interfaces fast

Replaces Retool

Comprehensive security scanner for containers and code

Replaces Snyk, Aqua

React framework for building internal tools and admin panels

Replaces Retool

Open-source APM and observability platform

Replaces Datadog, New Relic

Cloud-native container registry with security

Replaces Docker Hub, Artifactory

Interactive documentation for OpenAPI specifications

Replaces Postman

Build full-stack web apps in pure Python

Replaces Streamlit, Retool

All-in-one project management and team collaboration

Replaces Linear, Jira

Generate clean API documentation from OpenAPI definitions

Replaces Stoplight, ReadMe

Infrastructure as code using general-purpose languages

Replaces Terraform, AWS CloudFormation

Automated dependency updates for many ecosystems

Replaces Dependabot

Open-source observability platform for logs, metrics and traces

Replaces Datadog, Elasticsearch

Run and test HTTP requests with a plain text format

Replaces Postman, Insomnia

Declarative full-stack web framework for React and Node

Replaces Firebase

Unified backend framework for APIs, jobs and AI agents

Replaces Temporal, Inngest

Generate API tests and mocks from real traffic

Replaces Postman

Lightweight private npm proxy registry

Replaces GitHub

Python UI framework for web-based dashboards and apps

Replaces Streamlit, Gradio

Code generation platform for production-ready backends

Replaces Retool, Hasura

Modern OpenAPI documentation and API reference

Replaces Stoplight, ReadMe

Web-based automation platform for Ansible

Replaces Ansible Tower

Graph-relational database with a modern query language

Replaces Firebase, Supabase

Modern web UI for Ansible, Terraform and more

Replaces Ansible Tower, AWX

Open-source reactive backend with a TypeScript database

Replaces Firebase

Suite of web apps to build software faster

Replaces GitHub, Jira

Powerful HTTP client that lives in your terminal

Replaces Postman, Insomnia

Backend framework with built-in infrastructure for Go and TS

Replaces AWS Amplify

Explore and publish data from SQLite databases

Replaces Airtable

Continuous code quality and security inspection

Replaces GitHub

Toolkit to pack, ship, store and deliver container content

Replaces Docker Hub

Universal code search and intelligence platform

Replaces GitHub code search

Application monitoring and error tracking platform

Replaces Bugsnag, Rollbar

Browser editor for designing and validating OpenAPI documents

Replaces Stoplight, Postman

Terraform pull request automation

Replaces Terraform Cloud, Spacelift

Design and run mock REST APIs locally or self-hosted

Replaces Postman Mock Server

GitOps toolkit for keeping Kubernetes in sync

Replaces Spinnaker

Evaluate, test and monitor ML and LLM models

Replaces Arize, WhyLabs

Open-source backend defined from a single YAML file

Replaces Firebase, Supabase

Flexible API mocking and service virtualization

Replaces Mockoon, Postman Mock

Runbook automation and self-service operations

Replaces Ansible Tower

Flexible project management and issue tracking

Replaces Jira

Web-based SQL editor for querying and visualizing databases

Replaces DataGrip, phpMyAdmin

Web database management tool for many SQL and NoSQL engines

Replaces phpMyAdmin, DataGrip

OpenAPI-driven mock server and contract validation proxy

Replaces Postman, Stoplight

Intelligent software supply chain component analysis

Replaces Snyk

Terminal-based API client inspired by Postman

Replaces Postman, Insomnia

Automation platform for Kubernetes development and testing

Replaces Skaffold, Tilt

Property-based testing tool for APIs from their schema

Replaces Postman

Web user interface for the Docker Distribution registry

Replaces Docker Hub

Data transformation and modeling framework for SQL teams

Replaces dbt Cloud

Flexible JSON and YAML linter for OpenAPI and more

Replaces Stoplight Studio

Open-source no-code database and Airtable alternative

Replaces Airtable

Build internal tools and web apps from YAML config

Replaces Retool, Appsmith

Universal artifact repository manager

Replaces Artifactory

Production-ready vendor-neutral OCI registry

Replaces Docker Hub, Harbor

Lightweight service virtualization and API simulation

Replaces WireMock

API mocking and testing for cloud-native development

Replaces Postman Mock, WireMock

Command-line tools for working with container registries

Replaces docker CLI

Open-source API testing and monitoring toolkit

Replaces Postman Monitors

Powerful code and document review tool

Replaces Crucible

React framework for building server-side web apps

Replaces Next.js

Open-source error tracking and performance monitoring

Replaces Sentry, Bugsnag

Simple and efficient HTTP mock server

Replaces WireMock, Mockoon

Private PyPI server and packaging caching proxy

Replaces JFrog Artifactory

Self-hosted runtime for apps built with Anvil

Replaces Anvil Cloud, Retool

Unified source code management for Git, SVN and Mercurial

Replaces GitHub, Bitbucket

Auto-generated UI to test tRPC endpoints

Replaces Swagger UI

Community-driven fork of Phabricator

Replaces GitHub, Jira

Scriptable, lightweight mock server for REST and SOAP APIs

Replaces WireMock