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Id Agent alternatives & similar sites

AgentID - Cryptographic Identity for AI Agents — 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 Artificial Intelligence →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
4tress.org ↗	72 match 2 shared topics	4tress.org — Decentralized Identity for AI Agents	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
astracipher.com ↗	72 match 2 shared topics	AstraCipher — Identity for the Age of AI Agents	en	information-and-network-security	robots llmsaihumans	emailphone	partial · 8
ntty.ai ↗	72 match 2 shared topics	NTTY - Identity & Security for Autonomous AI Agents	en	information-and-network-security	robotsllmsaihumans	emailphone	none
astrix.security ↗	71 match 2 shared topics	Identity Security for AI Agents & NHIs \| Astrix Security	en	information-and-network-security WordPress	robots llmsaihumans	emailphone	none
1id.com ↗	70 match 2 shared topics	1id.com — Hardware-Backed Identity for AI Agents & Relying Parties	en	information-and-network-security	robots llmsaihumans	emailphone	none
efficientfrontierlabs.com ↗	70 match 2 shared topics	Efficient Frontier Labs \| Identity, Settlement, Accountability for AI Agents	United States~ en	artificial-intelligence	robotsllmsaihumans	emailphone	none
megent.dev ↗	69 match 2 shared topics	Firewall for AI agents.	en	information-and-network-security	robotsllmsaihumans	emailphone	none
abadge.io ↗	69 match 2 shared topics	abadge \| The credential control plane for AI agents	en	artificial-intelligence	robotsllmsaihumans	emailphone	partial · 8
mitrity.com ↗	69 match 2 shared topics	MITRITY — Governance for AI Agents	Sweden~ en	information-and-network-security	robotsllmsaihumans	emailphone	none
queryzero.net ↗	68 match 2 shared topics	QueryZero - Agent Identity & Trust	en	information-and-network-security	robotsllmsaihumans	emailphone	none
udara.ai ↗	68 match 2 shared topics	Udara — Trusted Identity AI for Africa	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
mimirwell.net ↗	68 match 2 shared topics	MimirWell — Sovereign Encrypted Memory for AI Agents	en	information-and-network-security	robotsllmsaihumans	emailphone	none
0eroshot.com ↗	68 match 2 shared topics	ZeroShot — Offensive Security Testing for AI Agents	en	information-and-network-security	robotsllmsaihumans	emailphone	partial · 8
a-perture.com ↗	68 match 2 shared topics	Aperture - ZK Compliance for AI Agent Payments	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
asymptotelabs.ai ↗	68 match 2 shared topics	Asymptote: The Security Harness for AI Agents	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
petiole.dev ↗	68 match 2 shared topics	Petiole — Zero-trust identity sidecar for autonomous agents	en	information-and-network-security	robotsllmsaihumans	emailphone	partial · 8
a1base.com ↗	68 match 2 shared topics	A1Base \| The API to give AI Agents a phone number, an email and a trusted identity	United States~ en	artificial-intelligence	robotsllmsaihumans	emailphone	none
okta.ph ↗	68 match 2 shared topics	Secure Identity for Employees, Customers, and AI \| Okta	en	information-and-network-security Adobe Experience Manager	robots llmsaihumans	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.