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Arena3C alternatives & similar sites

Tennis, Bergsteigen und Potenzmittel mit ärztlichem Check — 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
united-domains.de ↗	6 match shared topic	Domain Check: Kostenlos, schnell & mit Top-Service	Germany de	web-hosting WordPress	robotsllmsaihumans	emailphone	none
holidaycheck.de ↗	6 match shared topic	HolidayCheck • Dein Hotelbewertungs- und Reiseportal	Germany de	travel	robotsllmsaihumans	emailphone	none
check-dein-spiel.de ↗	6 match shared topic	Bundesinstitut für Öffentliche Gesundheit - Check dein Spiel: Start	Germany de	casinos-and-gambling TYPO3	robotsllmsaihumans	emailphone	none
check24.de ↗	6 match shared topic	CHECK24 \| Das Vergleichsportal	Germany de	personal-finance	robotsllmsaihumans	emailphone	none
check24.net ↗	6 match shared topic	CHECK24 - Stromvergleich & Gasvergleich \| Kfz-Versicherung, Kredit, DSL, Mobilfunk-Anbieter und Reisen im Vergleich	de		robotsllmsaihumans	emailphone	none
holidaycheck.at ↗	6 match shared topic	HolidayCheck • Dein Hotelbewertungs- und Reiseportal	Austria de	travel	robotsllmsaihumans	emailphone	none
carfax.com ↗	6 match shared topic	CARFAX Gebrauchtwagencheck \| CARFAX	Germany~ de	automotive	robotsllmsaihumans	emailphone	none
check24-partnerprogramm.de ↗	6 match shared topic	CHECK24-Partnerprogramm - Geld verdienen als Affiliate mit kostenlosen Vergleichen - Strom, Gas, DSL, Reisen	Germany de	marketing-and-advertising	robotsllmsaihumans	emailphone	none
tarifcheck.de ↗	6 match shared topic	Tarifcheck.de – das Vergleichsportal seit über 20 Jahren!	Germany de	insurance	robotsllmsaihumans	email phone	none
studycheck.de ↗	6 match shared topic	23.077 Studiengänge im Hochschulranking auf StudyCheck.de	Germany de	college-planning	robotsllmsaihumans	emailphone	none
procheck24.de ↗	6 match shared topic	PROCHECK24: Maklerservice & Vergleichsrechner	Germany de	consumer-banking WordPress	robotsllmsaihumans	emailphone	none
fernstudiumcheck.de ↗	6 match shared topic	Fernstudium: 130.881 Bewertungen auf FernstudiumCheck.de	Germany de	online-education	robotsllmsaihumans	emailphone	none
namecheck.com ↗	6 match shared topic	Check Domain Names and Social Media Usernames Online	de	WordPress	robotsllmsaihumans	emailphone	none
tennis04.com ↗	6 match shared topic	Automatisierung & Digitalisierung Ihrer Tennisanlage mit tennis04	de	tennis WordPress	robotsllmsaihumans	email phone	none
tennisplatz.info ↗	6 match shared topic	eTennis - Tennisplatz Reservierungssystem, Buchungssystem und Vereinsverwaltung für Tennisvereine und Tennishallen	de	tennis TYPO3	robotsllmsaihumans	emailphone	none
website-check.de ↗	6 match shared topic	Website-Check: Sicherheit für deinen Online-Auftritt	Germany de	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
hochzeitsvorbereitung.net ↗	6 match shared topic	Hochzeitsvorbereitung ~ Planung und Vorbereitung von Hochzeit und Trauung ~ Hochzeitsplaner, Weddingplaner ~ Checklisten, Kostenplanung, Terminplanung	de	wedding	robotsllmsaihumans	emailphone	none
hochzeitsspecials.net ↗	6 match shared topic	Hochzeitsspecials ~ Specials für Hochzeit und Brautpaar ~ Shopping Tipps und nützlicher Service ~ Themen, Trends, Hilfe, FAQ und Checkliste für Braut und Bräutigam	de	wedding	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.