onion.cardsScreenshot being generated…

onion.cards website report

onion.cards — AI flashcards, built for how you actually study

onion.cards generates swipeable flashcard decks from any topic or your own notes, instantly. Free to start — premium adds document upload, deck chat and web search.

Onion is ranked #4,546,792 worldwide (top 140%), has an estimated value of $674. It may earn around $39 per month from advertising.

English Cloudflare

Last updated

Estimated worth
$674
Automated valuation
Global rank
#4,546,792
Improving
Monthly visitors
408
20K page views
Domain age
—
Creation date unknown
Hosted in
United States
CloudFlare
Security headers
33/100
Response 0.32 s

Key facts about onion.cards

Domain
onion.cards
Website name
onion.cards — AI flashcards, built for how you actually study
Estimated worth
$674
Global rank
#4,546,792 (top 140% of 3.3M ranked sites)
Monthly visitors (est.)
408 · 20K page views
Server location
United States
Network
CloudFlare AS13335
CDN
Cloudflare
Email provider
Zoho Mail
Language
English
Data updated

Estimated traffic & revenue

Page viewsVisitorsAd revenue
Daily68114$1
Monthly20,417408$39
Yearly245,0044,896$468

Modelled from the global rank — not measured analytics. Use them to compare sites, not as exact figures.

Global rank history

#4.5M #51.4M #98.2M 2026-06: #13,862,154 Jun 26 2026-07: #98,163,250 Jul 26 2026-08: #98,155,932 Aug 26 2026-10: #4,546,792 Oct 26
Monthly values
MonthGlobal rank
2026-06#13,862,154
2026-07#98,163,250
2026-08#98,155,932
2026-10#4,546,792

Source: Rankeez (Tranco, Majestic, DomCop, Cisco Umbrella).

How we estimate onion.cards's value

$674

The estimate is the higher of two independent approaches, both computed automatically from public data.

  • Traffic value: $260Driven by the global rank #4,546,792 (≈20K page views / month) plus a capped age bonus.
  • Activity value: $674Domain age plus observable signs of an active, professionally run website.

Activity signals found

Domain age (unknown)$100
Active website with metadata+$150
Professional email (Zoho Mail)+$150
Email authentication (SPF)+$50
CDN / performance layer (Cloudflare)+$100
Security headers (33/100)+$99
IPv6 enabled+$25

Revenue, sales or private analytics are not public and are not included. This is not an appraisal or a sale price.

On-page SEO

Titleonion.cards — AI flashcards, built for how you actually study
61 chars
Meta descriptiononion.cards generates swipeable flashcard decks from any topic or your own notes, instantly. Free to start — premium adds document upload, deck chat and web search.
164 chars
Meta keywordsNone
LanguageEnglish
Response time0.32 s Fast

Homepage structure

The homepage content is rendered with JavaScript, so no headings, paragraphs or links were found in the server HTML. Search engines that do not run JavaScript see an almost empty page.

Technology & infrastructure

CDN / proxyCloudflare
Web servercloudflare
Platform / languageNot disclosed
DNS providerCloudflare
Email providerZoho Mail
SPF recordv=spf1 include:zohomail.com ~all
IPv6 (AAAA) Yes
CAA recordNo

Services verified in DNS

No third-party verification records found.

Domain name

Extension.cards — a generic top-level domain
Name length5 characters Short
Hyphens / digitsNo hyphen · no digits

Security headers

33
2 passed · 2 to improve · 5 missing
Homepage answered HTTP 200 at https://onion.cards/ · HTTP/3 available · checked Oct 22, 2026
  • HTTPSThe homepage is served over an encrypted HTTPS connection.
  • HTTP → HTTPS redirecthttp:// does not redirect to https://, so unencrypted visits are possible.
  • Strict-Transport-Security (HSTS)Not set: browsers may still try plain HTTP first.
  • Content-Security-PolicyNot set: no restriction on which scripts may run.
  • Clickjacking protectionNeither X-Frame-Options nor CSP frame-ancestors is set.
  • X-Content-Type-OptionsNot set to nosniff.
  • Referrer-PolicyNot set (browsers default to strict-origin-when-cross-origin).
  • Permissions-PolicyNot set: browser features are not explicitly restricted.
  • Software version disclosureNo software version numbers disclosed in headers.
Raw HTTP response headers
HTTP/2 200
date: Thu, 22 Oct 2026 15:10:35 GMT
content-type: text/html; charset=utf-8
report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=S0WvsIW5AsgN2zj7baH0eLwwtpfDA%2Fpx1bjexi1bYGy%2FZ%2BtyvVKjfZ9VhQLyeXWSuGlL7GxjnjEoyMEG28HHaxut4MrcZnqxmFPxLgBudNkSIz8Cnql2DJ5jIIlyPw%3D%3D"}]}
nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
content-encoding: zstd
server: cloudflare
cf-ray: a4e96e000f914fe6-CDG
alt-svc: h3=":443"; ma=86400

Hosting

IP address104.21.12.157
Location United States
Network (ISP)CloudFlare
Autonomous systemAS13335 CloudFlare, Inc.
Server softwarecloudflare

Nameservers

HostIPCountry
hassan.ns.cloudflare.com172.64.35.149 United States
dahlia.ns.cloudflare.com172.64.32.89 United States

Domain registration (WHOIS)

RegistrarUnknown
Raw WHOIS record
TLD is not supported.
>>> Last update of WHOIS database: 2026-10-03T02:28:35Z <<<

Terms of Use: Access to WHOIS information is provided to assist persons in determining the contents of a domain name registration record in the registry database. The data in this record is provided by Identity Digital or the Registry Operator for informational purposes only, and accuracy is not guaranteed. This service is intended only for query-based access. You agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data to (a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the data recipient's own existing customers; or (b) enable high volume, automated, electronic processes that send queries or data to the systems of Registry Operator, a Registrar, or Identity Digital except as reasonably necessary to register domain names or modify existing registrations. When using the Whois service, please consider the following: The Whois service is not a replacement for standard EPP commands to the SRS service. Whois is not considered authoritative for registered domain objects. The Whois service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the Whois services are throttled. If too many queries are received from a single IP address within a specified time, the service will begin to reject further queries for a period of time to prevent disruption of Whois service access. Abuse of the Whois system through data mining is mitigated by detecting and limiting bulk query access from single sources. Where applicable, the presence of a [Non-Public Data] tag indicates that such data is not made publicly available due to applicable data privacy laws or requirements. Should you wish to contact the registrant, please refer to the Whois records available through the registrar URL listed above. Access to non-public data may be provided, upon request, where it can be re
asonably confirmed that the requester holds a specific legitimate interest and a proper legal basis for accessing the withheld data. Access to this data provided by Identity Digital can be requested by submitting a request via the form found at https://www.identity.digital/about/policies/whois-layered-access/. The Registrar of Record identified in this output may have an RDDS service that can be queried for additional information on how to contact the Registrant, Admin, or Tech contact of the queried domain name. Identity Digital Inc. and Registry Operator reserve the right to modify these terms at any time. By submitting this query, you agree to abide by this policy.

DNS records

TypeHostValueTTL
Aonion.cardsip: 172.67.132.48298
Aonion.cardsip: 104.21.12.157298
NSonion.cardstarget: dahlia.ns.cloudflare.com86398
NSonion.cardstarget: hassan.ns.cloudflare.com86398
SOAonion.cardsmname: dahlia.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2415504106
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800
1800
MXonion.cardspri: 20
target: mx2.zoho.com
300
MXonion.cardspri: 10
target: mx.zoho.com
300
MXonion.cardspri: 50
target: mx3.zoho.com
300
TXTonion.cardstxt: zoho-verification=zb45623787.zmverify.zoho.com300
TXTonion.cardstxt: v=spf1 include:zohomail.com ~all300
AAAAonion.cardsipv6: 2606:4700:3037::ac43:8430298
AAAAonion.cardsipv6: 2606:4700:3033::6815:c9d298

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onion.cards compared with similar websites

WebsiteGlobal rankEst. worthRegisteredHosted in
onion.cards#4,546,792$674— United States
proprofsflashcards.com#7,595,880$2262020 United States
ankiapp.com#481,362$3,2692012 United States
pdfhost.io#20,624$133K2018 United States
project-management-prepcast.com#572,629$2,7442008 United States
mixtape.moe#451,859$3,3292026 United States
gostudyhq.com#50,599,447$2012014 United States

Websites ranked near onion.cards

  1. #4,546,765 rno.ru $605
  2. #4,546,781 pdxretro.com $455
  3. #4,546,781 altaeros.com $605
  4. #4,546,783 paypal-patterns.com $425
  5. #4,546,792 onion.cards $674
  6. #4,546,805 cityboundsim.com $410
  7. #4,546,811 weinrichmineralsinc.com $470
  8. #4,546,820 telandcloud.com $395
  9. #4,546,826 seven-soft.com $320

Questions about onion.cards

Where is onion.cards hosted?

Onion.cards's server (IP 104.21.12.157) is located in United States.

How much is onion.cards worth?

We estimate onion.cards is worth $674. This is an automated estimate based on the site's global traffic rank, domain age and observable activity signals (professional email, business services, security, CDN) — not a professional appraisal or a real sale price.

How much traffic does onion.cards get?

Based on its rank, onion.cards receives roughly 408 unique visitors and 20K page views per month. These figures are modelled from the rank, not measured.

What is onion.cards's global rank?

Onion.cards has an estimated global rank of 4,546,792, sourced from Rankeez.com, which aggregates the Tranco, Majestic, DomCop and Cisco Umbrella rankings. Its rank has improved over the tracked period. This is an independent estimate, not affiliated with Amazon Alexa, which discontinued its own ranking service in 2022.

Who hosts onion.cards?

Onion.cards resolves to 104.21.12.157, on the network of CloudFlare (AS13335), and is served through Cloudflare. Its DNS is managed by Cloudflare.

What email provider does onion.cards use?

According to its MX records, onion.cards receives email with Zoho Mail. It publishes an SPF record to authenticate its outgoing mail.

What websites are similar to onion.cards?

Popular websites in the same category as onion.cards include proprofsflashcards.com, ankiapp.com, pdfhost.io, project-management-prepcast.com, mixtape.moe.

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onion.cards on StatMemory

Shows your live global rank. To cite this report: “StatMemory, onion.cards website report, https://statmemory.com/onion.cards”.

StatMemory is not affiliated with onion.cards. This report shows publicly available data (DNS, WHOIS, HTTP headers, public top-site lists) and automated estimates for information purposes.