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Authin alternatives & similar sites

Authin — Secure Auth, API Access, MFA — 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 Information And Network Security →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
auth.mv ↗	69 match 2 shared topics	auth.mv - Secure Authentication Service by DOTMV	en	information-and-network-security	robotsllmsaihumans	emailphone	none
nedapsecurity.com ↗	68 match 2 shared topics	Nedap Access: Adapt, Secure, Thrive	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
36blocks.com ↗	67 match 2 shared topics	36Blocks — Secure Auth & User Management for Modern Apps	en	software-and-applications	robotsllmsaihumans	emailphone	none
voult.dev ↗	67 match 2 shared topics	voult.dev — Authentication, done properly.	en	information-and-network-security	robotsllmsaihumans	emailphone	none
auth5.net ↗	67 match 2 shared topics	Secure Authorization Server - Auth5	en	information-and-network-security	robotsllmsaihumans	emailphone	none
2fashare.com ↗	66 match 2 shared topics	2fashare — shared two-factor auth for teams	en	information-and-network-security	robotsllmsaihumans	emailphone	none
123andy.com ↗	66 match 2 shared topics	Splashtop - Fast, Secure Remote Access	en	information-and-network-security	robotsllmsaihumans	emailphone	none
authentikit.dev ↗	66 match 2 shared topics	AuthentiKit - Secure Your Mobile Apps	en	software-and-applications	robotsllmsaihumans	emailphone	partial · 8
authenticatorapp.net ↗	66 match 2 shared topics	Authenticator App: Secure 2FA & Sync Across Devices	en	information-and-network-security	robotsllmsaihumans	emailphone	none
dotveil.com ↗	66 match 2 shared topics	DotVeil - Secure Environment Variable Management	en	information-and-network-security	robotsllmsaihumans	emailphone	partial · 8
vortexuni.com ↗	66 match 2 shared topics	VortexUni — Your Digital Identity, Secured	en	software-and-applications	robotsllmsaihumans	emailphone	none
authentickey.app ↗	66 match 2 shared topics	2FA Authenticator App (MFA, TOTP) — Cloud Backup, Face ID \| Secure All Your Accounts	en	information-and-network-security	robotsllmsaihumans	emailphone	none
protektoid.com ↗	66 match 2 shared topics	Protektoid, secure your device	en	software-and-applications	robotsllmsaihumans	emailphone	none
2auth.com ↗	66 match 2 shared topics	2Auth — Authenticator & Password Manager	en	software-and-applications	robotsllmsaihumans	emailphone	partial · 8
nauthilus.org ↗	65 match 2 shared topics	Nauthilus	en	software-and-applications	robotsllmsaihumans	emailphone	none
asterixhardware.com ↗	65 match 2 shared topics	Asterix Hardware Access Control	en	information-and-network-security WordPress WooCommerce	robots llmsaihumans	emailphone	none
cryptum.dev ↗	65 match 2 shared topics	Kriptogeležis - Secure. Elegant. Mobile-first.	en	software-and-applications	robotsllmsaihumans	emailphone	none
crystalsecurity.eu ↗	65 match 2 shared topics	Crystal Security	European Union en	information-and-network-security Spree Commerce	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.