What technology does 12factor.net use?

We did not detect any specific technologies for 12factor.net in the latest scan.

Is 12factor.net secure (HTTPS)?

Yes. 12factor.net uses TLS 1.3 with a certificate issued by Amazon, valid until Oct 12, 2026.

Who hosts 12factor.net?

12factor.net is hosted on AWS, behind CloudFront CDN.

What is 12factor.net's SEO score?

12factor.net scored 75/100 for SEO in the latest analysis (fair).

What is 12factor.net's overall website score?

12factor.net has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.

12factor.net

The Twelve-Factor App

Last scanned Jul 26, 2026, 11:19 AM

Overall score

Great

Summary

A methodology for building modern, scalable, maintainable software-as-a-service apps. This website is hosted on AWS. SEO is good (75/100) and accessibility is good (85/100). Security scores good (80/100) and performance excellent (100/100). Top issue: Multiple H1 headings found.

A methodology for building modern, scalable, maintainable software-as-a-service apps.

United States

Hosted on AWS

Top issues to fix

8 issues found · 2 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
1 cookie without Secure/HttpOnly flags
Security
Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Multiple H1 headings found
SEO
Keep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEO
Add og:title/og:description/og:image so shared links render a proper preview card.

+2 more issues — details in the sections below.

SEO

4 issue(s) found

100

Performance

765 ms

Security

HTTPS & header checks

Accessibility

1 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

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

A methodology for building modern, scalable, maintainable software-as-a-service apps.

Meta tags

Title: The Twelve-Factor App
Description: A methodology for building modern, scalable, maintainable software-as-a-service apps.
Canonical: https://12factor.net/
Language: en
Charset: utf-8
Viewport: width=device-width, initial-scale=1.0
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: AWS
CDN provider: CloudFront
IP address: 65.8.76.86
ASN: AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

Type	Value
A	65.8.76.86 65.8.76.19 65.8.76.47 65.8.76.115
AAAA	2600:9000:2153:4c00:2:407c:dd80:93a1 2600:9000:2153:7600:2:407c:dd80:93a1 2600:9000:2153:2e00:2:407c:dd80:93a1 2600:9000:2153:3600:2:407c:dd80:93a1 2600:9000:2153:2000:2:407c:dd80:93a1 2600:9000:2153:6a00:2:407c:dd80:93a1 2600:9000:2153:dc00:2:407c:dd80:93a1 2600:9000:2153:a800:2:407c:dd80:93a1
MX	—
TXT	v=spf1 -all v=DMARC1; p=reject; aspf=s; adkim=s;
NS	dns2.p01.nsone.net dns1.p01.nsone.net ns04.herokudns.net dns4.p01.nsone.net ns03.herokudns.net dns3.p01.nsone.net ns02.herokudns.net ns01.herokudns.net
CAA	—
CNAME	—
IPv6 support	Yes

TLS / SSL certificate

Version: TLS 1.3
Issuer: Amazon
Subject: 12factor.net
Valid from: Mar 29, 2026
Valid to: Oct 12, 2026
Days until expiry: 76
SAN domains: 12factor.net, www.12factor.net

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyMissing
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 5 · H2 12 · H3 12

Links

34 internal · 13 external · 0 broken

Images

2 total · 1 missing alt

Scripts / Styles

3 scripts · 2 stylesheets

JS / CSS size

372 B · 6.7 KB

Page size

10.3 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Found
URLs in sitemap: 380

SEO issues

Multiple H1 headings found
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found

Scan details

Requested URL: https://12factor.net
Final URL: https://12factor.net
HTTP status: 200
HTTP version: HTTP/2
Response time: 765 ms
HTML size: 10.3 KB
Redirect chain: https://12factor.net

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