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Open Foundation — 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 Science →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
arxiv.org ↗	42* match	arXiv.org e-Print archive	en	Science	robots	–	none
ufz.de ↗	112* match	Home - Helmholtz-Centre for Environmental Research	Germany de	Environment Spree Commerce	–	–	none
universetoday.com ↗	111* match	Universe Today - Space and Astronomy News	en	Space and Astronomy WordPress	–	–	none
esa.int ↗	56* match	European Space Agency	en	Space and Astronomy	–	–	none
nasa.gov ↗	32* match	NASA	en	Space and Astronomy WordPress	–	–	none
openreview.net ↗	70* match	Venues \| OpenReview	en	Science	robots	–	none
simonsfoundation.org ↗	70* match	Advancing Research in Basic Science and Mathematics \| Simons Foundation	en	Science Weebly	–	–	none
openaire.eu ↗	70* match	OpenAIRE	European Union en	Science Joomla	–	–	none
williamengdahl.com ↗	70* match	Planck Foundation \| \| integrating all branches of science into comprehensive analyses and models \| \| Monetary Sciences \| \| Economic Sciences \| \| Energy Sciences \| \| Physical Sciences \| \| Agricultural Sciences \| \| Planck Foundation is founded and funded by Gijs Graafland in 1999.	en	Science WordPress Lightspeed	robots	–	none
globalfood.info ↗	70* match	Planck Foundation \| \| integrating all branches of science into comprehensive analyses and models \| \| Monetary Sciences \| \| Economic Sciences \| \| Energy Sciences \| \| Physical Sciences \| \| Agricultural Sciences \| \| Planck Foundation is founded and funded by Gijs Graafland in 1999.	en	Science WordPress Lightspeed	robots	–	none
intracontinental.org ↗	70* match	Planck Foundation \| \| integrating all branches of science into comprehensive analyses and models \| \| Monetary Sciences \| \| Economic Sciences \| \| Energy Sciences \| \| Physical Sciences \| \| Agricultural Sciences \| \| Planck Foundation is founded and funded by Gijs Graafland in 1999.	en	Science WordPress Lightspeed	robots	–	none
desertcorp.com ↗	70* match	Planck Foundation \| \| integrating all branches of science into comprehensive analyses and models \| \| Monetary Sciences \| \| Economic Sciences \| \| Energy Sciences \| \| Physical Sciences \| \| Agricultural Sciences \| \| Planck Foundation is founded and funded by Gijs Graafland in 1999.	en	Science WordPress Lightspeed	robots	–	none
worldclusters.com ↗	70* match	Planck Foundation \| \| integrating all branches of science into comprehensive analyses and models \| \| Monetary Sciences \| \| Economic Sciences \| \| Energy Sciences \| \| Physical Sciences \| \| Agricultural Sciences \| \| Planck Foundation is founded and funded by Gijs Graafland in 1999.	en	Science WordPress Lightspeed	robots	–	none
planck.org ↗	70* match	Planck Foundation \| \| integrating all branches of science into comprehensive analyses and models \| \| Monetary Sciences \| \| Economic Sciences \| \| Energy Sciences \| \| Physical Sciences \| \| Agricultural Sciences \| \| Planck Foundation is founded and funded by Gijs Graafland in 1999.	en	Science WordPress Lightspeed	–	–	none
budapestopenaccessinitiative.org ↗	70* match	Budapest Open Access Initiative – Make research publicly available	en	Science WordPress	–	–	none
unitedresearchforum.com ↗	70* match	United Research Forum \| Conference Organizer \| Open Access Journals \|	en	Science	–	–	none
falling-walls.com ↗	70* match	Falling Walls Foundation \| Falling Walls	en	Science Drupal	robots	email	none
sfi.ie ↗	70* match	Science Foundation Ireland - For What’s Next	Ireland en	Science	–	email phone	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.