Top 12 Open-Source Alternatives to CurlHub.io

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API API Clients API Design API Gateway API Management API Testing API Tools APIs Api Analytics Business Workflows Developer Tools HTTP Proxies

Summary

The top open-source alternatives to CurlHub.io are MockServer, Hoppscotch, and Webhook.site. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

MockServer Landing Page
1

MockServer

Easy mocking of any system you integrate with via HTTP or HTTPS.
Pricing:
- Open Source
#API #API Tools #Developer Tools 4 social mentions
Hoppscotch Landing Page
2

Hoppscotch

Open source API development ecosystem
Pricing:
- Open Source
- Freemium
- Free Trial
#Productivity #API Tools #Developer Tools 90 social mentions
Webhook.site Landing Page
3

Webhook.site

Instantly generate a free, unique URL and email address to test, inspect, and automate (with a visual workflow editor and scripts) incoming HTTP requests and emails.
Pricing:
- Open Source
- Freemium
- $14.0 / Monthly
#API #Sales Workflow #Data Integration 75 social mentions
Bearer Landing Page
4

Bearer

Bearer is an open source, fast and accurate static application security testing (SAST) tool that analyze your source code to discover, filter and prioritize security and privacy risks.
Pricing:
- Open Source
- Freemium
- Free Trial
#Security #Security & Privacy #APIs
Checkly Landing Page
5

Checkly

Fresh API monitoring and Site Transaction Monitoring. From one great dashboard.
Pricing:
- Open Source
#API #API Tools #Developer Tools 9 social mentions
StopLight Landing Page
6

StopLight

Stoplight is an API Design, Development, and Documentation platform that enables consistency, reusability, and quality in your API lifecycle, all with an easy, enjoyable developer experience.
Pricing:
- Open Source
- Freemium
- Free Trial
#API #API Tools #API Management 30 social mentions
WireMock Landing Page
7

WireMock

WireMock - a web service test double for all occasions.
Pricing:
- Open Source
#API Tools #Developer Tools #APIs 21 social mentions
Postman Landing Page
8

Postman

The Collaboration Platform for API Development
Pricing:
- Open Source
#API Tools #Developer Tools #APIs 30 social mentions
Mockoon Landing Page
9

Mockoon

Mockoon is the easiest and quickest way to design and run mock REST APIs. No remote deployment, no account required, free and open-source.
Pricing:
- Open Source
- Paid
- Free Trial
- $15.0 / Monthly (5 API mocks synchronized accross your devices, 1 mock deployed)
#API Tools #Developer Tools #APIs 34 social mentions
Insomnia REST Landing Page
10

Insomnia REST

Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.
Pricing:
- Open Source
#API #API Tools #Developer Tools 129 social mentions
Gravitee.io Landing Page
11

Gravitee.io

Gravitee.io is a flexible, lightweight and an open source API management solution.
Pricing:
- Open Source
- Freemium
- Free Trial
#API Tools #Monitoring Tools #API Management 4 social mentions
Tailwind CSS Landing Page
12

Tailwind CSS

A utility-first CSS framework for rapidly building custom user interfaces.
Pricing:
- Open Source
#Development Tools #CSS Framework #UI 1013 social mentions