knock.app
Knock | Customer engagement infrastructure
Last scanned Jul 24, 2026, 8:25 PM · 1 view
Overall score
Excellent
Summary
Product and customer messaging infrastructure for email, SMS, in-app, push, Slack, and MS Teams. This website uses Next.js hosted on Cloudflare behind Cloudflare CDN. SEO is excellent (95/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance excellent (90/100). Top issue: Meta description longer than 160 characters.
Knock
Product and customer messaging infrastructure for email, SMS, in-app, push, Slack, and MS Teams. The most powerful notification system you'll never build.
- 175 Varick St, #413, New York, NY, 10014
- 11-50 employees
- Hosted on Cloudflare
Products & pricing
Product and pricing information published in this site's own structured data.
Pricing that scales with you
$0/mo USD
Top issues to fix
2 issues found
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
SEO
1 issue(s) found
Performance
290 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Knock
Product and customer messaging infrastructure for email, SMS, in-app, push, Slack, and MS Teams. The most powerful notification system you'll never build.
- Employees
- 11-50
Contact
Email, phone, and address published on this site's own pages.
- support@knock.app
- Address
- 175 Varick St, #413, New York, NY, 10014
Meta tags
- Title
- Knock | Customer engagement infrastructure
- Description
- Knock is customer engagement infrastructure for your product, marketing, and transactional messaging. Activate your data, ship cross-channel messaging, and accelerate growth.
- Canonical
- https://knock.app
- Language
- en-US
- Charset
- utf-8
- Viewport
- width=device-width
- Robots meta
- index,follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.18.9.234
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- knock.app
- Valid from
- Jul 17, 2026
- Valid to
- Oct 16, 2026
- Days until expiry
- 83
- SAN domains
- knock.app, e1.knock.app
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsMissing
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 11 · H3 4
Links
43 internal · 25 external · 0 broken
Images
72 total · 4 missing alt
Scripts / Styles
72 scripts · 4 stylesheets
JS / CSS size
105 KB · 2.4 KB
Page size
403 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- Meta description longer than 160 characters
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://knock.app
- Final URL
- https://knock.app
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 282 ms
- HTML size
- 403 KB
- Redirect chain
- https://knock.app
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Frequently asked questions
- What technology does knock.app use?
- knock.app is built with Next.js, Google Analytics.
- Is knock.app secure (HTTPS)?
- Yes. knock.app uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 16, 2026.
- Who hosts knock.app?
- knock.app is hosted on Cloudflare, behind Cloudflare CDN.
- What is knock.app's SEO score?
- knock.app scored 95/100 for SEO in the latest analysis (excellent).
- What is knock.app's overall website score?
- knock.app has an overall SiteGraph score of 94/100, combining SEO, performance, security, and accessibility.
- What company operates knock.app?
- knock.app is operated by Knock. Product and customer messaging infrastructure for email, SMS, in-app, push, Slack, and MS Teams. The most powerful notification system you'll never build.
- What products does knock.app offer?
- knock.app offers Pricing that scales with you.
OpenGraph & Twitter Card
OpenGraph
Twitter Card