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NerdGrinder - TTRPG Tools for Game Masters — 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 Roleplaying Games →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
mithos.app ↗	72 match 1 shared topics	MITHOS: Game Master's TTRPG Toolkit	en	roleplaying-games	robotsllmsaihumans	emailphone	none
mtnlandgames.com ↗	69 match 1 shared topics	Mountainland Games – Tools for TTRPGs.	en	roleplaying-games WordPress WooCommerce	robotsllmsaihumans	emailphone	none
gamemastersguild.org ↗	69 match 1 shared topics	The Game Masters Guild	en	roleplaying-games WordPress Shopify	robotsllmsaihumans	emailphone	none
gamemasterslaboratory.com ↗	67 match 1 shared topics	Game Master's Laboratory	en	roleplaying-games	robotsllmsaihumans	emailphone	none
airpghub.info ↗	66 match 1 shared topics	Home \| AIRPG \| AI RPG Game Master for Tabletop Roleplaying	en	roleplaying-games	robotsllmsaihumans	emailphone	none
airpghub.org ↗	66 match 1 shared topics	Home \| AIRPG \| AI RPG Game Master for Tabletop Roleplaying	en	roleplaying-games	robotsllmsaihumans	emailphone	none
wanderingmonster.ai ↗	66 match 1 shared topics	Wandering Monster \| AI Game Master for Handcrafted Fantasy Adventures	en	roleplaying-games	robotsllmsaihumans	emailphone	none
detectmagic.net ↗	66 match 1 shared topics	Detect Magic Games - Professional Game Master	en	roleplaying-games Squarespace Magento	robotsllmsaihumans	emailphone	none
mynamegenerators.com ↗	66 match 1 shared topics	name generator \| 100+ Free Tools for Characters, Brands & Gaming	en	roleplaying-games	robotsllmsaihumans	emailphone	none
myadventures.ai ↗	65 match 1 shared topics	MyAdventures.AI — Solo Tabletop RPG with an AI Game Master	en	roleplaying-games	robotsllmsaihumans	emailphone	none
myadventures.app ↗	65 match 1 shared topics	MyAdventures.AI — Solo Tabletop RPG with an AI Game Master	en	roleplaying-games	robotsllmsaihumans	emailphone	none
fishbulb.io ↗	65 match 1 shared topics	Fish Bulb — Game Tools Studio	en	roleplaying-games	robotsllmsaihumans	emailphone	partial · 8
3diprints.com ↗	65 match 1 shared topics	...the SPOT for gamers!	en	roleplaying-games	robotsllmsaihumans	emailphone	none
mythmeister.com ↗	65 match 1 shared topics	Myth Meister - D&D Campaign Manager for Dungeon Masters	en	roleplaying-games	robotsllmsaihumans	emailphone	none
thealpinedm.com ↗	65 match 1 shared topics	The Alpine DM - The best resources for TTRPG GMs!	en	roleplaying-games WordPress WooCommerce	robotsllmsaihumans	emailphone	none
nebula-worlds.com ↗	64 match 1 shared topics	Nebula - Architecture for Dungeon Masters	en	roleplaying-games	robotsllmsaihumans	emailphone	none
adventuremaster.org ↗	64 match 1 shared topics	Adventure Master SRD	en	roleplaying-games WordPress	robots llmsaihumans	emailphone	none
sojournersawake.org ↗	64 match 1 shared topics	Sojourners Awake! – Game Master Articles on Tabletop Roleplaying Games	en	roleplaying-games 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.