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Projects21 alternatives & similar sites

Project for the Study of the 21st Century – Events, podcasts and more to understand a complex era — 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 War And Conflicts →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
projects21.com ↗	100 match 1 shared topics	Project for the Study of the 21st Century – Events, podcasts and more to understand a complex era	en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
militaryhistoryposters.com ↗	66 match 1 shared topics	JH MILITARY HISTORY POSTERS \| Honoring the events and the heroes of the Vietnam War	en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
lennyunencumbered.com ↗	66 match 1 shared topics	lenny unencumbered – Contemplating a bewildering world through empathy and understanding	en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
csiw-ectg.org ↗	65 match 1 shared topics	Conjugal Slavery in War – Partnership for the Study of Enslavement, Marriage and Masculinities	en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
kabulfalling.com ↗	65 match 1 shared topics	Kabul Falling – A Project Brazen Originals Podcast	en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
mediationinlaw.org ↗	65 match 1 shared topics	Home — The Center for Understanding in Conflict	en	war-and-conflicts WordPress WooCommerce	robotsllmsaihumans	emailphone	none
nagornokarabakh.com ↗	64 match 1 shared topics	NagornoKarabakh.com – Knowledge resource for policymakers, journalists and academia	en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
cubanmissilecrisis.org ↗	64 match 1 shared topics	Home • Cuban Missile CrisisCuban Missile Crisis \| Harvard Kennedy School’s Belfer Center has created this site as a resource for the Cuban Missile Crisis. Designed to help policymakers, students, and interested citizens draw lessons from these critical events half a century ago, this site not	United States~ en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
ilaibavati.com ↗	64 match 1 shared topics	Ilai Bavati – Observations and Opinions on Israel and the Middle East	en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
kachinalliance.org ↗	64 match 1 shared topics	Kachin Alliance – Peace, Justice and Freedom for the Kachin	en	war-and-conflicts WordPress WooCommerce	robotsllmsaihumans	emailphone	none
idpukraine.com ↗	64 match 1 shared topics	Ukraine’s Hidden Tragedy – Understanding the outcomes of population displacement from the country’s war torn regions	en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
projectanderzof.com ↗	64 match 1 shared topics	project anderzof – A techofuturist cold war	en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
1stplatoon.org ↗	64 match 1 shared topics	The Story of the First Platoon - Home	en	war-and-conflicts Weebly	robotsllmsaihumans	emailphone	none
b24.net ↗	63 match 1 shared topics	WW2 Historical documentation of the 392nd Bomb Group at Wendling England and Stalag Luft German POW Camps for Airmen.	en	war-and-conflicts	robotsllmsaihumans	emailphone	none
memorytruthjustice.com ↗	63 match 1 shared topics	Memory, Truth & Justice - From the survivors of the People's ...	en	war-and-conflicts WordPress	robotsllmsaihumans	emailphone	none
ddunleavy.com ↗	63 match 1 shared topics	Understanding Suffering - Dennis Dunleavy	en	war-and-conflicts Weebly WooCommerce	robots llmsaihumans	emailphone	none
alwazzani.com ↗	63 match 1 shared topics	Solidarity with Palestine: History and Advocacy \| SOLIDARITY WITH PALESTINE	en	war-and-conflicts	robotsllmsaihumans	emailphone	none
karabakhbeforeandafteroccupation.com ↗	63 match 1 shared topics	Karabakh. Before and after occupation	en	war-and-conflicts	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.