Open Source Builders screenshot

Open Source Builders

APIs & Dev Tools

FreeNewIn APIs & Dev Tools

About

Directory pairing popular paid software with its open-source alternatives.

Where Open Source Builders appears

Best APIs & Dev Tools in 2026: Our Top PicksOne of 15 tools

Ready to try Open Source Builders?

Opens opensource.builders in a new tab.

Similar tools

BuiltWith Dnd Kit Helm for App Store Connect TalkToGitHub Toolcraft Formcarry

The weekly drop

The best new tools, every week. No spam, unsubscribe anytime.

Alternatives & related tools

BuiltWith preview

New

BuiltWith

See the tech stack behind any website, from CMS to analytics.

Dnd Kit preview

Dnd Kit

Framework-agnostic toolkit for building drag and drop interfaces.

Helm for App Store Connect preview

New

Helm for App Store Connect

Mac and iOS app that makes App Store Connect faster for updates, localization and releases.

TalkToGitHub preview

New

TalkToGitHub

Chat with any public GitHub repo instead of reading the docs.

Toolcraft preview

Toolcraft

Open-source starter kit and UI library for building AI design apps.

Formcarry preview

Formcarry

Form endpoint that collects submissions without writing a backend.

SiteQuest preview

New

SiteQuest

Overlay browser that floats any website on top of whatever app you are in.

TesterArmy preview

TesterArmy

AI QA testing across web and mobile, run before each release.

More in APIs & Dev Tools

Domain SDK preview

Domain SDK

API for adding, verifying and monitoring customer domains.

Autosana preview

Autosana

End-to-end testing that writes and maintains the tests with AI.

Context.dev preview

Context.dev

Scraping API that returns structured data instead of raw HTML.

AI CLI preview

AI CLI

Generate text, images and video from the command line.