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Cryptup alternatives & similar sites

FlowCrypt: PGP Encryption for Gmail — 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
cryptup.net ↗	85 match 2 shared topics	FlowCrypt: PGP Encryption for Gmail	en	information-and-network-security	robots llmsaihumans	emailphone	none
atommail.net ↗	65 match 2 shared topics	Proton Mail: Get a free email account with privacy and encryption \| Proton	en	information-and-network-security	robotsllmsaihumans	emailphone	none
protonmail.com ↗	65 match 2 shared topics	Proton Mail: Get a free email account with privacy and encryption \| Proton	en	information-and-network-security	robotsllmsaihumans	emailphone	none
myhushmailnow.com ↗	65 match 2 shared topics	Hushmail: Encrypted Email and E-Signable Forms	Canada~ en	email HubSpot	robotsllmsaihumans	emailphone	none
skiff.com ↗	64 match 2 shared topics	Skiff - Private, encrypted, secure email - 10 GB free	en	email Sanity	robotsllmsaihumans	emailphone	none
prowesstrack.com ↗	62 match 2 shared topics	SendGrade — Email security audit for your domain	en	information-and-network-security	robotsllmsaihumans	emailphone	none
1secmail.io ↗	61 match 2 shared topics	1secmail -	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
siteformrelay.com ↗	61 match 2 shared topics	Site Form Relay	en	email	robotsllmsaihumans	emailphone	none
intercallapacmail.com ↗	61 match 2 shared topics	Intercall – Secure Webmail	en	information-and-network-security	robotsllmsaihumans	emailphone	none
proxiedmail.com ↗	61 match 2 shared topics	ProxiedMail \| proxy-email service	en	email	robots llmsaihumans	emailphone	none
hrmail.net ↗	61 match 2 shared topics	hrMail. - Privacy & Security, Made in Croatia	en	email	robotsllmsaihumans	emailphone	none
1sec-mail.com ↗	61 match 2 shared topics	Temp Mail \| Online Disposable Email \| 1SecMail	en	email	robotsllmsaihumans	emailphone	none
proxmail.org ↗	61 match 2 shared topics	SimpleLogin \| Open source anonymous email service	en	information-and-network-security	robotsllmsaihumans	emailphone	partial · 8
neomailbox.com ↗	60 match 2 shared topics	Neomailbox - Offshore Secure Email Service, Secure Email Accounts, Domain Mail Hosting	en	email	robotsllmsaihumans	emailphone	none
atthemoment.io ↗	60 match 2 shared topics	Welcome	en	email	robotsllmsaihumans	emailphone	none
atabuse.com ↗	60 match 2 shared topics	AtAbuse \| Anti-Abuse Security Tools & Resources	en	information-and-network-security	robotsllmsaihumans	emailphone	none
donjrsekur.com ↗	60 match 2 shared topics	Sekur	en	information-and-network-security	robotsllmsaihumans	emailphone	none
dontbouncespam.com ↗	60 match 2 shared topics	Why you shouldn't bounce spam and viruses	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.