onion.cards website report
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
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 views | Visitors | Ad revenue | |
|---|---|---|---|
| Daily | 681 | 14 | $1 |
| Monthly | 20,417 | 408 | $39 |
| Yearly | 245,004 | 4,896 | $468 |
Modelled from the global rank — not measured analytics. Use them to compare sites, not as exact figures.
Global rank history
Monthly values
| Month | Global 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
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
| Title | onion.cards — AI flashcards, built for how you actually study 61 chars |
|---|---|
| Meta description | 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. 164 chars |
| Meta keywords | None |
| Language | English |
| Response time | 0.32 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 / proxy | Cloudflare |
|---|---|
| Web server | cloudflare |
| Platform / language | Not disclosed |
| DNS provider | Cloudflare |
| Email provider | Zoho Mail |
| SPF record | v=spf1 include:zohomail.com ~all |
| IPv6 (AAAA) | Yes |
| CAA record | No |
Services verified in DNS
No third-party verification records found.
Domain name
| Extension | .cards — a generic top-level domain |
|---|---|
| Name length | 5 characters Short |
| Hyphens / digits | No hyphen · no digits |
Security headers
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 address | 104.21.12.157 |
|---|---|
| Location | |
| Network (ISP) | CloudFlare |
| Autonomous system | AS13335 CloudFlare, Inc. |
| Server software | cloudflare |
Nameservers
| Host | IP | Country |
|---|---|---|
| hassan.ns.cloudflare.com | 172.64.35.149 | |
| dahlia.ns.cloudflare.com | 172.64.32.89 |
Domain registration (WHOIS)
| Registrar | Unknown |
|---|
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
| Type | Host | Value | TTL |
|---|---|---|---|
| A | onion.cards | ip: 172.67.132.48 | 298 |
| A | onion.cards | ip: 104.21.12.157 | 298 |
| NS | onion.cards | target: dahlia.ns.cloudflare.com | 86398 |
| NS | onion.cards | target: hassan.ns.cloudflare.com | 86398 |
| SOA | onion.cards | mname: dahlia.ns.cloudflare.com rname: dns.cloudflare.com serial: 2415504106 refresh: 10000 retry: 2400 expire: 604800 minimum-ttl: 1800 | 1800 |
| MX | onion.cards | pri: 20 target: mx2.zoho.com | 300 |
| MX | onion.cards | pri: 10 target: mx.zoho.com | 300 |
| MX | onion.cards | pri: 50 target: mx3.zoho.com | 300 |
| TXT | onion.cards | txt: zoho-verification=zb45623787.zmverify.zoho.com | 300 |
| TXT | onion.cards | txt: v=spf1 include:zohomail.com ~all | 300 |
| AAAA | onion.cards | ipv6: 2606:4700:3037::ac43:8430 | 298 |
| AAAA | onion.cards | ipv6: 2606:4700:3033::6815:c9d | 298 |
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onion.cards compared with similar websites
| Website | Global rank | Est. worth | Registered | Hosted in |
|---|---|---|---|---|
| onion.cards | #4,546,792 | $674 | — | |
| proprofsflashcards.com | #7,595,880 | $226 | 2020 | |
| ankiapp.com | #481,362 | $3,269 | 2012 | |
| pdfhost.io | #20,624 | $133K | 2018 | |
| project-management-prepcast.com | #572,629 | $2,744 | 2008 | |
| mixtape.moe | #451,859 | $3,329 | 2026 | |
| gostudyhq.com | #50,599,447 | $201 | 2014 |
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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.
Own onion.cards? Add the badge
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.