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mxu.io — email inboxes for AI agents & test suites | MCP-native email API — 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
snoooz.ai ↗	65 match shared topic	Snoooz \| AI Email Automation for Teams & Shared Inboxes	en	email HubSpot WooCommerce	robotsllmsaihumans	emailphone	none
agentmail.to ↗	65 match shared topic	AgentMail \| Email Inbox API for AI Agents	en	artificial-intelligence	robots llmsaihumans	emailphone	none
mixmax.com ↗	60 match shared topic	Mixmax \| Easy, automated email follow-up	en	email	robotsllmsaihumans	emailphone	none
nylas.com ↗	60 match shared topic	Nylas: Email, Calendar, Meeting Intelligence API & AI Agent Accounts	en	email WordPress WooCommerce	robotsllmsaihumans	emailphone	none
virtualworkforce.ai ↗	60 match shared topic	AI Email assistant– Virtualworkforce.ai	en	artificial-intelligence WordPress	robotsllmsaihumans	emailphone	none
email.com ↗	60 match shared topic	Email.com \| Email Inbox AI	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
sanebox.com ↗	60 match shared topic	SaneBox \| Email Management for Any Inbox	en	email	robotsllmsaihumans	emailphone	none
shortwave.com ↗	60 match shared topic	Shortwave — Automate your email with AI	en	email	robotsllmsaihumans	emailphone	none
chatgpt-for-email.com ↗	55 match shared topic	ChatGPT for Gmail by cloudHQ	Canada~ en	email	robotsllmsaihumans	emailphone	none
fyxer.com ↗	55 match shared topic	Fyxer \| Get ahead of your inbox	en	email	robotsllmsaihumans	emailphone	none
dove.email ↗	55 match shared topic	Dove - Your inbox, at peace.	en	artificial-intelligence Storyblok	robotsllmsaihumans	emailphone	none
noptin.com ↗	42 match shared topic	AI Newsletter & Email Automation Plugin for WordPress \| Noptin	en	marketing-and-advertising WordPress WooCommerce	robots llmsaihumans	emailphone	none
ravenna.ai ↗	38 match shared topic	Ravenna \| Agentic ITSM \| Automate Every Request	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
schedule-email.com ↗	38 match shared topic	Schedule Email \| Free Boomerang Alternative	Canada~ en	email	robotsllmsaihumans	emailphone	none
endyinboxes.com ↗	38 match shared topic	Endy Inboxes \| Automated Cold Email Infrastructure	en	email	robotsllmsaihumans	emailphone	none
mailin.ai ↗	38 match shared topic	Best Price to Deliverability Cold Email Inboxes	en	email	robotsllmsaihumans	emailphone	none
lightcone.ai ↗	38 match shared topic	Lightcone — The world's fastest model for computer use agents	en	artificial-intelligence	robotsllmsaihumans	emailphone	none
slicey.ai ↗	38 match shared topic	Slicey: Cold Email Infrastructure \| High deliverability Inboxes	en	email	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.