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Regex Learn - Step by step, from zero to advanced. — 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 Programming Languages →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
fastapiinteractive.com ↗	64 match 2 shared topics	FastAPI Interactive Tutorials - Learn FastAPI with Hands-on Coding	en	programming-languages	robotsllmsaihumans	emailphone	none
basiccodingconcepts.io ↗	64 match 2 shared topics	Basic Coding Concepts - Learn Programming Fundamentals	en	programming-languages	robotsllmsaihumans	emailphone	none
cs1.dev ↗	64 match 2 shared topics	AdvancedPython.net \| Advanced Python	en	programming-languages	robotsllmsaihumans	emailphone	none
nanocheat.com ↗	64 match 2 shared topics	Learn Nano Text Editor Interactively \| Free Browser Simulator	en	programming-languages	robotsllmsaihumans	emailphone	none
usecodecrafters.com ↗	64 match 2 shared topics	CodeCrafters \| Advanced programming challenges	US~ en	programming-languages	robotsllmsaihumans	emailphone	none
cspraxisprep.com ↗	63 match 2 shared topics	CS++ — Learn Computer Science by Building Real Things	en	programming-languages WordPress	robotsllmsaihumans	emailphone	none
desicodes.com ↗	63 match 2 shared topics	DesiCodes \| Learn Programming in Your Own Language	en	programming-languages	robotsllmsaihumans	emailphone	none
100reactcomponents.com ↗	63 match 2 shared topics	100 React Components – Practice React with Interactive Exercises	en	programming-languages	robotsllmsaihumans	emailphone	none
basicbook.org ↗	63 match 2 shared topics	So You Want To Learn – Open source books	en	programming-languages WordPress	robotsllmsaihumans	emailphone	none
100jsfunctions.com ↗	63 match 2 shared topics	100 JS Functions — Free Interactive JavaScript Exercises	en	programming-languages	robotsllmsaihumans	emailphone	none
denobeginner.com ↗	63 match 2 shared topics	Deno Beginner \| Deno Crash Course \| Learn Deno	en	programming-languages	robotsllmsaihumans	emailphone	none
codevector.co.uk ↗	62 match 2 shared topics	Welcome to CodeVector your home for all things code	GB en	programming-languages	robotsllmsaihumans	emailphone	full · 14
csharpinthecards.com ↗	62 match 2 shared topics	C# in the Cards - Learn C# Programming with Jeff Fritz	US~ en	programming-languages	robotsllmsaihumans	emailphone	none
accracoder.com ↗	62 match 2 shared topics	Learn Python. Build Real Skills. - accracoder.com	en	programming-languages WordPress WooCommerce	robotsllmsaihumans	emailphone	none
100daysofcode.io ↗	62 match 2 shared topics	Learn programming in 100 days \| 100 Days of Code \| #100DaysOfCode	en	programming-languages	robotsllmsaihumans	emailphone	none
joinmytutor.com ↗	62 match 2 shared topics	Learn Python Tutorials Online Free \| JoinMyTutor	en	programming-languages	robotsllmsaihumans	emailphone	none
journi.dev ↗	62 match 2 shared topics	Journi \| VibeCode Your Way Through Fun Challenges	en	programming-languages	robotsllmsaihumans	emailphone	none
pixelizedcoding.com ↗	62 match 2 shared topics	1-on-1 Coding Classes for Kids & Teens \| Pixelized Coding	en	programming-languages	robotsllmsaihumans	emailphone	partial · 4

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.