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The Source alternatives & similar sites

The Source — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Programming Languages →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
4programming.com ↗	85 match shared topic	4Programming -- Specialized Search for Programming Resources	en	programming-languages	robotsllmsaihumans	emailphone	none
freepascal.org ↗	85 match shared topic	Free Pascal - Advanced open source Pascal compiler for Pascal and Object Pascal - Home Page		programming-languages	robotsllmsaihumans	emailphone	none
sourcemod.net ↗	85 match shared topic	SourceMod: Half-Life 2 Scripting	en	programming-languages	robotsllmsaihumans	emailphone	none
zen-cart.it ↗	30 match shared topic	Software Open Source E-commerce Zen Cart	Italy it	software-and-applications WordPress WooCommerce	robotsllmsaihumans	emailphone	none
dolibarr.it ↗	30 match shared topic	Dolibarr ERP & CRM - Il gestionale open source - Dolibarr ERP/CRM software OpenSource	Italy it	software-and-applications WordPress	robotsllmsaihumans	emailphone	none
javascriptsource.com ↗	58 match shared topic	JavaScriptSource - Search 5,000+ Free JavaScript Snippets	en	programming-languages WordPress	robotsllmsaihumans	emailphone	partial · 8
php.net ↗	55 match shared topic	PHP	en	programming-languages	robotsllmsaihumans	emailphone	none
doctrine-project.org ↗	58 match shared topic	Doctrine: PHP Open Source Project	en	programming-languages Contao Sylius	robotsllmsaihumans	emailphone	none
programacion.net ↗	58 match shared topic	Programacion en castellano ajax ruby on rails html php mysql asp java perl cgi codigo fuente open source gpl linux windows delphi foros gratis. Programación en Castellano.	es	programming-languages	robotsllmsaihumans	emailphone	none
python.org ↗	55 match shared topic	Welcome to Python.org	en	programming-languages	robotsllmsaihumans	emailphone	none
jdx.dev ↗	58 match shared topic	@jdx — open source at entire.io	en	technology-and-computing	robotsllmsaihumans	emailphone	none
codecogs.com ↗	58 match shared topic	CodeCogs \| Open Source Scientific Library (C/C++, .NET, Excel)	en	programming-languages	robotsllmsaihumans	emailphone	none
typescriptlang.org ↗	55 match shared topic	TypeScript: JavaScript With Syntax For Types.	en	programming-languages	robotsllmsaihumans	emailphone	none
go.dev ↗	55 match shared topic	The Go Programming Language	en	programming-languages	robotsllmsaihumans	emailphone	none
golang.org ↗	55 match shared topic	The Go Programming Language	en	programming-languages	robotsllmsaihumans	emailphone	none
raspberrypi.org ↗	55 match shared topic	Teach, learn, and make with the Raspberry Pi Foundation	en	programming-languages	robotsllmsaihumans	emailphone	none
codeforces.com ↗	55 match shared topic	Codeforces	en	programming-languages	robotsllmsaihumans	emailphone	full · 14
reactnative.dev ↗	55 match shared topic	React Native · Learn once, write anywhere	en	programming-languages	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.