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SGSiteGraph

os.tc

Customer Engagement Platform for Email, Push… - OneSignal

Last scanned Aug 4, 2026, 11:00 PM · 6 views

89

Overall score

Great

Summary

The world's leader for mobile push notifications, web push, SMS, email and in-app messaging. This website uses jQuery behind Cloudflare CDN. SEO is good (85/100) and accessibility is excellent (100/100). Security scores good (85/100) and performance excellent (90/100). Top issue: Meta description longer than 160 characters.

The world's leader for mobile push notifications, web push, SMS, email and in-app messaging. Trusted by 2 million+ businesses to send 12 billion+ messages per…

Top issues to fix

6 issues found · 1 high priority

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Meta description longer than 160 characters

    SEO

    Trim the meta description to under 160 characters to avoid truncation in search results.

  • robots.txt not found

    SEO

    Publish /robots.txt with a Sitemap: directive to guide crawlers.

  • sitemap.xml not found

    SEO

    Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

  • 8 broken links on the page

    SEO

    Fix or remove broken links — they waste crawl budget and erode user trust.

85

SEO

3 issue(s) found

90

Performance

108 ms

85

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-3 overall since Jul 27, 2026

Overall
89
SEO
85
Security
85
Performance
90
Accessibility
100

Organization

Company details published in this site's own structured data.

The world's leader for mobile push notifications, web push, SMS, email and in-app messaging. Trusted by 2 million+ businesses to send 12 billion+ messages per…

GitHubGitHubLinkedInFacebookInstagramX (Twitter)

Meta tags

Title
Customer Engagement Platform for Email, Push… - OneSignal
Description
The world's leader for mobile push notifications, web push, SMS, email and in-app messaging. Trusted by 2 million+ businesses to send 12 billion+ messages per…
Canonical
https://onesignal.com/
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1, shrink-to-fit=no
Robots meta
all
Manifest
https://onesignal.com/site.webmanifest

OpenGraph & Twitter Card

OpenGraph

og:title
Customer Engagement Platform for Email, Push Notifications, & SMS
og:description
The world's leader for mobile push notifications, web push, SMS, email and in-app messaging. Trusted by 2 million+ businesses to send 12 billion+ messages per…
og:type
website
og:url
https://onesignal.com/

Twitter Card

twitter:card
summary_large_image
twitter:title
Customer Engagement Platform for Email, Push Notifications, & SMS
twitter:description
The world's leader for mobile push notifications, web push, SMS, email and in-app messaging. Trusted by 2 million+ businesses to send 12 billion+ messages per…

Technologies

Detected frameworks, languages, and tools.

jQuery

Hosting & CDN

Hosting provider
—
CDN provider
Cloudflare
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Google Trust Services
Subject
onesignal.com
Valid from
Jun 13, 2026
Valid to
Sep 11, 2026
Days until expiry
37
SAN domains
onesignal.com

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyEnabled
  • Permissions-PolicyMissing

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 1 · H2 10 · H3 5

Links

73 internal · 16 external · 8 broken

Images

8 total · 0 missing alt

Scripts / Styles

29 scripts · 6 stylesheets

JS / CSS size

3.9 KB · 26.7 KB

Page size

861 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Meta description longer than 160 characters
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://os.tc
Final URL
https://onesignal.com/
HTTP status
200
HTTP version
HTTP/2
Response time
91 ms
HTML size
861 KB
Redirect chain
https://os.tc → https://onesignal.com/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does os.tc use?
os.tc is built with jQuery.
Is os.tc secure (HTTPS)?
Yes. os.tc uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 11, 2026.
Who hosts os.tc?
Hosting provider information for os.tc is not available yet.
What is os.tc's SEO score?
os.tc scored 85/100 for SEO in the latest analysis (great).
What is os.tc's overall website score?
os.tc has an overall SiteGraph score of 89/100, combining SEO, performance, security, and accessibility.
Has os.tc's score changed over time?
os.tc's overall score has declined by 3 points (from 92 to 89) since Jul 27, 2026.