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Cbchallenge alternatives & similar sites

30 Day Challenge - 30 Day Challenge — 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 Fitness And Exercise →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
365milechallenge.net ↗	70 match 1 shared topics	365 Mile Challenge \| Virtual Fitness Challenge	en	fitness-and-exercise Weebly WooCommerce	robotsllmsaihumans	emailphone	none
365milechallenge.org ↗	70 match 1 shared topics	365 Mile Challenge \| Virtual Fitness Challenge	en	fitness-and-exercise Weebly WooCommerce	robotsllmsaihumans	emailphone	none
5kchallenge.com ↗	70 match 1 shared topics	5kChallenge.com — Take the Challenge	en	fitness-and-exercise	robotsllmsaihumans	emailphone	none
365daychallenge.org ↗	69 match 1 shared topics	We Are One 365 Challenge \| We Are One 365 Challenge	en	fitness-and-exercise WordPress	robotsllmsaihumans	emailphone	none
ifitchallenge.com ↗	69 match 1 shared topics	iFitChallenge.com — Take the Challenge	en	fitness-and-exercise	robotsllmsaihumans	emailphone	none
100jumpsaday.com ↗	69 match 1 shared topics	100 Jumps a Day Challenge \| Crossrope	en	fitness-and-exercise Shopify	robotsllmsaihumans	emailphone	none
365challenge.org ↗	69 match 1 shared topics	365 Challenge - Free fitness consistency challenge compatible with Strava	United Kingdom~ en	fitness-and-exercise	robots llmsaihumans	emailphone	none
fitdadinitiative.com ↗	68 match 1 shared topics	40 Day Fit and Faith Challenge for Dads	en	fitness-and-exercise Lightspeed	robotsllmsaihumans	emailphone	none
lemiles.com ↗	68 match 1 shared topics	Lemiles — Your 100-Day Challenge Buddy	en	fitness-and-exercise	robotsllmsaihumans	emailphone	partial · 8
karateforkidsliverpool.com ↗	68 match 1 shared topics	21 Days of Fitness Challenge - 21 Days of Fitness	United States~ en	fitness-and-exercise Weebly	robotsllmsaihumans	emailphone	none
prologishealthysteps.com ↗	68 match 1 shared topics	Fitness Challenge	en	fitness-and-exercise	robotsllmsaihumans	emailphone	none
flexbasechallenge.com ↗	67 match 1 shared topics	Flex Base Challenge	en	fitness-and-exercise	robotsllmsaihumans	emailphone	none
iamfirechallenge.com ↗	67 match 1 shared topics	I Am Fire Challenge	en	fitness-and-exercise	robotsllmsaihumans	emailphone	none
d23fitnesschallenge.com ↗	67 match 1 shared topics	D23 Fitness Challenge	en	fitness-and-exercise WordPress	robotsllmsaihumans	emailphone	none
100pushupschallenge.com ↗	67 match 1 shared topics	100 Pushups Challenge	en	fitness-and-exercise	robotsllmsaihumans	emailphone	none
8weekchallenge.com.au ↗	67 match 1 shared topics	8weekchallenge	Australia en	fitness-and-exercise	robots llmsaihumans	emailphone	partial · 8
beactivefitness.com.au ↗	67 match 1 shared topics	Be Active 6 Week Challenge - Belgravia Leisure	Australia en	fitness-and-exercise	robotsllmsaihumans	emailphone	none
brandonrasean.com ↗	67 match 1 shared topics	The Gym By Brandon Rasean – Become Him – 90 Day Challenge	en	fitness-and-exercise WordPress	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.