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Openddb alternatives & similar sites

OpenDDB - Open and independent distribution — 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

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
cdbaby.com ↗	20 match shared topic	Music Distribution for Independent Artists \| CD Baby	en	music WordPress	robotsllmsaihumans	emailphone	none
punctumbooks.com ↗	20 match shared topic	punctum books – An independent, open-access para-academic publisher	en	books-and-literature	robotsllmsaihumans	emailphone	none
kermitproject.org ↗	20 match shared topic	Open-Source Kermit Project - Free, Portable, Scriptable, Transport-Independent Communications Software. Hosted by Panix.com.	en	software-and-applications	robotsllmsaihumans	emailphone	none
cargorecordsdirect.co.uk ↗	20 match shared topic	Cargo Independent Distribution's Mailorder Service	United Kingdom en	logistics Shopify	robots llmsaihumans	emailphone	none
bsdrp.net ↗	20 match shared topic	BSD Router Project: Open Source Router Distribution - BSD Router Project	en	computer-networking	robots llmsaihumans	emailphone	none
antigenic.ngo ↗	20 match shared topic	Antigenic Research Institute — Independent Research. Open Technology. — Antigenic Research Institute	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
odoo.com ↗	10 match shared topic	Open Source ERP and CRM \| Odoo	en	business	robotsllmsaihumans	emailphone	none
openstreetmap.org ↗	10 match shared topic	OpenStreetMap	en	maps-and-navigation	robotsllmsaihumans	emailphone	none
osmfoundation.org ↗	10 match shared topic	OpenStreetMap Foundation	en	maps-and-navigation	robotsllmsaihumans	emailphone	none
teepublic.com ↗	10 match shared topic	Unique Apparel, Stickers and Gifts \| Designed by Independent Artists \| TeePublic	en	pop-culture	robotsllmsaihumans	emailphone	none
domain.pay ↗	10 match shared topic	Pre-order Your .PAY Domain \| Be First When .PAY Opens	en	shopping	robotsllmsaihumans	emailphone	partial · 8
ghost.org ↗	10 match shared topic	Ghost: The best open source blog & newsletter platform	en	marketing-and-advertising Ghost	robotsllmsaihumans	emailphone	none
prnewswire.com ↗	10 match shared topic	PR Newswire: press release distribution, targeting, monitoring and marketing \| PR Newswire	United States~ en	marketing-and-advertising Adobe Experience Manager	robotsllmsaihumans	emailphone	none
virtualmin.com ↗	10 match shared topic	Virtualmin — Open Source Web Hosting Control Panel	en	web-hosting phpBB	robotsllmsaihumans	emailphone	none
nextcloud.com ↗	10 match shared topic	Nextcloud - Open source content collaboration platform	en	cloud-computing WordPress	robotsllmsaihumans	emailphone	none
fourthwall.com ↗	10 match shared topic	Fourthwall \| The best way for creators to open shops, offer memberships, and engage supporters	en	shopping	robotsllmsaihumans	emailphone	none
sourceforge.net ↗	10 match shared topic	Compare B2B Software, Download, & Develop Open Source & Business Software - SourceForge	United States~ en	software-and-applications	robots llmsaihumans	emailphone	none
videojs.com ↗	10 match shared topic	Video.js \| Open Source Video Player	en	web-development	robots llmsaihumans	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.