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readwise.io Paid content

Categories: Education & Learning

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Updated: 2026-09-26 22:43 Language: English (default) Access: Normal

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What is readwise.io?
Easily revisit and learn from your highlights and annotations.
Does readwise.io offer paid content?
Paid content or plans are available. Check the website for current prices and included features.
What languages does readwise.io support?
Primary language: English.
How can I visit readwise.io?
Use the Visit website link to open the website in a new tab.
What are some alternatives to readwise.io?
Related websites include zathura.dev, yousician.com, yorku.ca, york.ac.uk, yomu.ai, yogababy.com.au. Compare their features and pricing for your needs.

Website Overview

An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality. Page metadata, canonical configuration and social previews work together to provide more consistent search and sharing presentation.

Domain and Registration

Registered in 2017, this domain has about 9 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The registrar is NameCheap, Inc., a widely used domain service provider. The domain uses the common .io extension, which is not an independent safety signal.

DNS and Email

Nameservers are provided by Cloudflare, indicating managed DNS hosting. MX records point to the Google Workspace email service. No CNAME was found; the observed records resolve directly to addresses. SPF and DMARC are configured. DKIM status is unknown. TXT records include verification markers for Google. Such markers may also remain after a service stops being used.

TLS and Certificates

The public key uses EC with 256 bits. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued by Let's Encrypt, commonly associated with automated certificate services. The certificate's total validity is about 89 days, consistent with a short renewal cycle.

HTTP and Browser Security

The response lacks these common security headers: HSTS, Permissions-Policy. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. The cf-ray response header indicates a CDN or caching proxy in the delivery path. No obvious internal addresses or debug information were found in the headers. The Server header identifies cloudflare without an exact version.

Technology Stack Analysis

The public page identifies Google Tag Manager, Cloudflare without precise versions, leaving fewer clues for version-specific scanning.

Search and Social Sharing

Twitter Card metadata is configured. JSON-LD includes Organization data, helping describe the organization as an entity. The title has 43 characters, within a common display range. A meta description is present, with 62 characters. The observed directives allow indexing and link following.

Hosting and Email

DNSCloudflare
HostingCloudflare
EmailGoogle Workspace
Location Location unknown 104.26.8.37

User reviews (0)

  • No reviews yet.

Pages, Search and Sharing

Meta descriptionEasily revisit and learn from your highlights and annotations.
Canonical URLhttps://readwise.io/
LanguageEnglish (default)
Twitter Cardsummary_large_image

Social Sharing Preview

14 fields

robots.txt (opens in a new tab)

4 rules
All bots 1 allowed · 3 disallowed
  • Allow/
  • Disallow/to_kindle
  • Disallow/appleauth/login/
  • Disallow/landing/step

Sitemaps

1

Registration details RDAP / WHOIS

RegistrarNameCheap, Inc.
Registered2017-08-28
Expires2029-08-28
Domain statusclientTransferProhibited https://icann.org/epp#clientTransferProhibited
Nameserverscory.ns.cloudflare.com、ines.ns.cloudflare.com
DNSSECunsigned

DNS records

TypeNameValueTTLPriority
Areadwise.io104.26.8.37300—
Areadwise.io104.26.9.37300—
Areadwise.io172.67.69.113300—
AAAAreadwise.io2606:4700:20::681a:825191—
AAAAreadwise.io2606:4700:20::681a:925191—
AAAAreadwise.io2606:4700:20::ac43:4571191—
MXreadwise.ioaspmx.l.google.com3001
MXreadwise.ioalt1.aspmx.l.google.com3005
MXreadwise.ioalt2.aspmx.l.google.com3005
MXreadwise.ioaspmx2.googlemail.com30010
MXreadwise.ioaspmx3.googlemail.com30010
NSreadwise.iocory.ns.cloudflare.com86400—
NSreadwise.ioines.ns.cloudflare.com86400—
TXTreadwise.iogoogle-site-verification=ABiKSFlHNxUfwI5JOFykth2ygQOEMiJ3osZ3fNWBm8U300—
TXTreadwise.iogoogle-site-verification=iS7iy4KrUrmoe7nVdj7OOCerNSzkJ4hKvZLeq7wJjj0300—
TXTreadwise.iov=spf1 a mx include:helpscoutemail.com include:_spf.google.com ~all300—
DMARC_dmarc.readwise.iov=DMARC1; p=none; pct=100; rua=mailto:[email protected]; sp=none; aspf=r;300—

TLS and certificates

AssessmentNormal configuration
Supported protocolsTLSv1.2、TLSv1.3
Negotiated protocolTLSv1.3
Certificate subjectreadwise.io
IssuerLet's Encrypt
Valid until2026-12-05T20:15 · Remaining when checked: 69 days
Verification detailsCertificate trust: Passed · Hostname match: Passed

HTTP response headers

HeaderValue
content-typetext/html; charset=utf-8
servercloudflare
content-security-policydefault-src 'self' https:; script-src 'self' 'unsafe-inline' 'unsafe-eval' https: blob:; style-src 'self' 'unsafe-inline' https:; font-src 'self' https: data:; img-src 'self' https: http: data: blob:; connect-src 'self' https: wss:; media-src 'self' https: blob:; frame-src 'self' https:; frame-ancestors 'self'; worker-src 'self' blob:; object-src 'self' https:; base-uri 'self'; form-action 'self' https:; upgrade-insecure-requests
x-frame-optionsDENY
x-content-type-optionsnosniff
referrer-policysame-origin
set-cookieRedacted

Identified technologies

Google Tag ManagerCloudflare