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Postscale - The email API for sending, inbound, and privacy — 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 Email →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
piisend.com ↗	69 match 1 shared topics	Piisend — The Email API built for developers and their agents	en	email	robots llmsaihumans	emailphone	none
elecopedia.com ↗	68 match 1 shared topics	Mailjet: Best Email Marketing Software & Email API for Teams	en	email WordPress WooCommerce	robotsllmsaihumans	emailphone	none
picksupersendpro.com ↗	68 match 1 shared topics	SuperSend - Cold Email Infrastructure for Sending at Scale	en	email	robots llmsaihumans	emailphone	none
1-email.com ↗	68 match 1 shared topics	1-Email.com — Email Verification API for Developers	en	email	robotsllmsaihumans	emailphone	none
checkboxhq.com ↗	67 match 1 shared topics	checkboxHQ - API for Email Validation & Verification	en	email	robots llmsaihumans	emailphone	none
turainvite.com ↗	67 match 1 shared topics	TuraInvite - Send invite emails via API	en	email	robotsllmsaihumans	emailphone	partial · 6
9mail.org ↗	66 match 1 shared topics	9mail.org \| Your private email service	en	email	robotsllmsaihumans	emailphone	none
cute70.com ↗	66 match 1 shared topics	YOPmail - Disposable Email Address - Anonymous and temporary inbox	en	email	robotsllmsaihumans	emailphone	none
100megabit.com ↗	66 match 1 shared topics	100 Megabit \| Privacy Email Service	en	email	robotsllmsaihumans	emailphone	none
turasend.com ↗	66 match 1 shared topics	TuraSend - Email, alerts, and newsletters from your app	en	email	robotsllmsaihumans	emailphone	partial · 6
rapidemail.net ↗	66 match 1 shared topics	RapidEmail.net – Fast, Secure Email for Corporate and Private Use	en	email WordPress WooCommerce	robotsllmsaihumans	emailphone	none
rbox.me ↗	66 match 1 shared topics	Sustainable, Private & Secure Email \| Runbox	en	email WordPress WooCommerce	robotsllmsaihumans	emailphone	none
mcstock.org ↗	66 match 1 shared topics	Sustainable, Private & Secure Email \| Runbox	en	email WordPress WooCommerce	robots llmsaihumans	emailphone	none
catchmail.io ↗	66 match 1 shared topics	Catchmail - Free Disposable Email API \| Custom Domain Support	en	email	robotsllmsaihumans	emailphone	none
3n-nikkhah.com ↗	66 match 1 shared topics	Nikkhah Family — Private Email Domain	en	email	robotsllmsaihumans	emailphone	none
kasapost.com ↗	66 match 1 shared topics	KasaPost \| Business Mailboxes and Transactional Email	en	email	robotsllmsaihumans	emailphone	none
quicktempmail.app ↗	66 match 1 shared topics	QuickTempEmail - Free Temp Mail Generator \| Disposable Email Service	en	email	robotsllmsaihumans	emailphone	none
emailforall.co.uk ↗	66 match 1 shared topics	Email for All - Action Rocket and Beyond the Envelope	United Kingdom 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.