Alternatives to Insomnia Enterprise in 2026

Hoppscotch hoppscotch

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

Developer tool Production-ready Your team wants a Postman-like client that it can self-host or use in the browser.

★ 81k MIT TypeScript Active, pushed 2 days ago

Bruno usebruno

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

Developer tool Production-ready You want Postman-style testing without cloud sync, keeping collections in your repository.

★ 48k MIT JavaScript Active, pushed today

Insomnia Kong

The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

Developer tool Production-ready You need an API client with API design features and work in the Kong ecosystem.

★ 40k Apache-2.0 TypeScript Active, pushed today

Yaak mountain-loop

The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬

Developer tool Production-ready You want a fast, local Postman alternative without an account.

★ 19k MIT TypeScript Active, pushed yesterday

Scalar scalar

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern REST API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

Developer tool Production-ready You publish an OpenAPI spec and want better-looking docs than Swagger UI with try-it-out requests.

★ 16k MIT TypeScript Active, pushed today

RWKV-Runner josStorer

A RWKV management and startup tool, full automation, only 8MB. And provides an interface compatible with the OpenAI API. RWKV is a large language model that is fully open source and available for commercial use.

Complete system Usable You want to run RWKV models on your own PC and use them from ChatGPT-style clients.

★ 6.5k MIT TypeScript Active, pushed today

Notion-sdk-js makenotion

Official Notion JavaScript Client

Building block Production-ready You build an integration or automation against Notion in JavaScript.

★ 5.7k MIT TypeScript Active, pushed today

Hey API hey-api

👨‍🚀 Turn API specifications into production-ready SDKs, validators, mocks, and more. 20+ plugins. Millions of weekly npm downloads. Used by Vercel, OpenCode, PayPal, AWS, Autodesk, and many more.

Developer tool Production-ready Your TypeScript front end or service consumes an OpenAPI-described API and you want generated, typed clients.

★ 5.6k MIT TypeScript Active, pushed 2 days ago

Nba_api swar

An API Client package to access the APIs for NBA.com

Building block Usable You analyse basketball statistics in Python.

★ 3.9k MIT Python Active, pushed 5 days ago

ATAC Julien-cpsn

A simple API client (postman like) in your terminal

Developer tool Usable You live in the terminal and want a Postman-style client there.

★ 3.7k MIT Rust Active, pushed 14 days ago

Cortex cortex-docs

Cortex - Generates interactive API documentation, typed SDKs, and MCP servers from OpenAPI, AsyncAPI, GraphQL, gRPC, OpenRPC, and Markdown.

Developer tool Usable You maintain a public API and want docs, SDKs and an MCP server generated together.

★ 3.3k MIT TypeScript Active, pushed 28 days ago

Apidash foss42

API Dash is a beautiful AI-powered open-source cross-platform (Desktop & Mobile) API Client built using Flutter which can help you easily create & customize your HTTP & GraphQL API requests, visually inspect responses and generate API integration code. A lightweight alternative to postman/insomnia.

Developer tool Usable You want a free API client that also runs on mobile.

★ 2.9k Apache-2.0 Dart Active, pushed 10 days ago

Restfox flawiddsouza

Offline-First Minimalistic HTTP & Socket Testing Client for the Web & Desktop

Developer tool Usable You want a lightweight API client that also works in a browser tab.

★ 2.8k MIT TypeScript Active, pushed 4 days ago

Huggingface.js huggingface

Use Hugging Face with JavaScript

Building block Production-ready You build JavaScript apps that call Hugging Face models or manage Hub repositories.

★ 2.6k MIT TypeScript Active, pushed today

Reverse API Engineer kalil0321

Reverse engineer any website into a typed API client. Works with Claude Code, Codex, Cursor and OpenCode.

Developer tool Experimental You need programmatic access to a site that has no public API and you have the right to automate it.

★ 2.5k MIT Python Active, pushed 5 days ago

Notion-sdk-py ramnes

Notion API client SDK, rewritten in Python! (sync + async)

Building block Production-ready You automate Notion from Python.

★ 2.2k MIT Python Active, pushed today

Voiden VoidenHQ

Design, Test and Document APIs in plain Markdown. Compose Requests with API blocks. Reuse, Replace & Version everything just like code. Offline, Truly Git Native, No Lock-in.

Developer tool Usable You want API requests and docs to live as plain files beside your code.

★ 2k Apache-2.0 TypeScript Active, pushed today

Resterm unkn0wn-root

Terminal API client for HTTP, GraphQL, gRPC, WebSocket and SSE. Plain .http files you can diff and version, with scripted tests, workflows, mocks, recorder, and a CLI runner for CI.

Developer tool Usable You want API requests as text files in Git that run both interactively and in CI.

★ 2k Apache-2.0 Go Active, pushed 3 days ago

DPP brainboxdotcc

C++ Discord API Bot Library - D++ is Lightweight and scalable for small and huge bots!

Building block Production-ready You want to write a Discord bot in C++ with a small memory footprint.

★ 1.4k Apache-2.0 C++ Active, pushed yesterday

Algoliasearch-client-javascript algolia

⚡️ A fully-featured and blazing-fast JavaScript API client to interact with Algolia.

Building block Production-ready You use Algolia hosted search in a JavaScript project.

★ 1.4k MIT TypeScript Active, pushed 3 days ago

UniFi-API-client Art-of-WiFi

A PHP API client class to interact with Ubiquiti's UniFi Controller API

Building block Production-ready You automate or report on a UniFi network from PHP.

★ 1.3k MIT PHP Active, pushed 16 days ago

UniFi API browser Art-of-WiFi

Tool to browse data exposed by Ubiquiti's UniFi Controller API

Developer tool Production-ready You administer UniFi networks and want to see data the UniFi UI does not show.

★ 1.3k MIT PHP Active, pushed 14 days ago

Curlie rs

The power of curl, the ease of use of httpie.

Developer tool Usable You like HTTPie's readability but need curl's full feature set.

★ 3.7k MIT Go Slowing, pushed 11 months ago

Ruby OpenAI alexrudall

OpenAI API + Ruby! 🤖❤️ GPT-5 & Realtime WebRTC compatible!

Building block Production-ready A Ruby or Rails app needs to call OpenAI.

★ 3.2k MIT Ruby Slowing, pushed 6 months ago

Mastodon.py halcy

Python wrapper for the Mastodon ( https://github.com/mastodon/mastodon/ ) API.

Building block Production-ready You write bots, scripts or tools for Mastodon or compatible Fediverse servers in Python.

★ 959 MIT Python Active, pushed 4 days ago

Firecamp firecamp-dev

Developer-first OpenSource API DevTool, Postman/Insomnia alternative.

Developer tool Experimental You need a client that handles Socket.IO testing well.

★ 2.6k AGPL-3.0 TypeScript Slowing, pushed 8 months ago

Chapar chapar-rest

Fast, native API client for REST, gRPC, WebSocket and GraphQL. A local-first Postman alternative written in Go: no Electron, no account, no cloud.

Developer tool Usable You want a light, local API client without Electron or an account.

★ 729 BSD-3-Clause Go Active, pushed 4 days ago

CLI httpie

🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more.

Developer tool Production-ready You call APIs from the terminal and find curl's syntax hard to read.

★ 39k BSD-3-Clause Python Quiet, pushed 2 years ago

ApiArk berbicanes

Privacy-first API platform built with Tauri v2. No login, no cloud, ~60 MB RAM. A lightweight Postman alternative.

Developer tool Experimental You want a lighter Postman replacement and are fine with a very new tool.

★ 1.3k MIT TypeScript Slowing, pushed 7 months ago

Client GitLabPHP

GitLab API v4 client for PHP

Building block Production-ready A PHP or Laravel application needs to automate GitLab.

★ 951 MIT PHP Slowing, pushed 6 months ago

Postman Postman, Inc.

Go faster from development to production with higher accuracy and fewer tokens.

Developer tool Production-ready A team wants shared API collections, tests and documentation in one widely known tool.

1k readers a month Commercial