What technology does letsencrypt.org use?

We did not detect any specific technologies for letsencrypt.org in the latest scan.

Is letsencrypt.org secure (HTTPS)?

Yes. letsencrypt.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 4, 2026.

Who hosts letsencrypt.org?

letsencrypt.org is hosted on AWS, behind Netlify CDN.

What is letsencrypt.org's SEO score?

letsencrypt.org scored 75/100 for SEO in the latest analysis (fair).

What is letsencrypt.org's overall website score?

letsencrypt.org has an overall SiteGraph score of 93/100, combining SEO, performance, security, and accessibility.

Is letsencrypt.org hiring?

Yes. letsencrypt.org has 13 open roles listed on their careers page.

letsencrypt.org

Let's Encrypt

Last scanned Jul 14, 2026, 1:29 PM

Overall score

Excellent

Summary

This website is hosted on AWS. SEO is good (75/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.

SEO

4 issue(s) found

100

Performance

79 ms

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Organization

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

GitHub LinkedIn

Meta tags

Title: Let's Encrypt
Description: Let's Encrypt is a free, automated, and open Certificate Authority brought to you by the nonprofit Internet Security Research Group (ISRG). Read all about our nonprofit work this year in our 2025 Annual Report.
Canonical
Language: en-US
Charset: utf-8
Viewport: width=device-width, initial-scale=1
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: AWS
CDN provider: Netlify
IP address: 13.215.239.219
ASN: AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

Type	Value
A	13.215.239.219 52.74.6.109
AAAA	2406:da18:b3d:e201::259 2406:da18:b3d:e201::258
MX	aspmx3.googlemail.com aspmx.l.google.com alt2.aspmx.l.google.com alt1.aspmx.l.google.com aspmx2.googlemail.com
TXT	sending_domain1011011=f98c68e7636a708a1987c7b9da300d64a354041fa41ea2039fbb02bc18c4ed0f v=spf1 include:_spf.google.com ip4:23.178.112.0/24 ip4:66.133.109.36 ip4:64.78.152.132 include:mail.zendesk.com include:_spf.intacct.com -all pardot1011011=d160caff32c4415bb46bb82d8c50e5bea7ea1a74f5a149cb96bd952467266044
NS	vera.ns.cloudflare.com owen.ns.cloudflare.com
CAA	0 issue "letsencrypt.org" 0 issuewild "pki.goog" 0 issuewild "amazon.com" 0 issue "pki.goog" 0 issuewild "letsencrypt.org" 0 issuewild "sectigo.com" 0 issue "sectigo.com" 0 issuewild "ssl.com" 0 issuewild "www.digicert.com" 0 issue "ssl.com" 0 issue "amazon.com" 0 issue "www.digicert.com"
CNAME	—
IPv6 support	Yes

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: letsencrypt.org
Valid from: Jul 6, 2026
Valid to: Oct 4, 2026
Days until expiry: 82
SAN domains: cp.letsencrypt.org, cp.root-x1.letsencrypt.org, cps.letsencrypt.org, cps.root-x1.letsencrypt.org, lencr.org, letsencrypt.com, letsencrypt.org, www.lencr.org, www.letsencrypt.com, www.letsencrypt.org

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 2 · H2 6 · H3 9

Links

47 internal · 102 external · 0 broken

Images

95 total · 0 missing alt

Scripts / Styles

6 scripts · 2 stylesheets

JS / CSS size

12.9 KB · 157 KB

Page size

87.9 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
Missing canonical link
Multiple H1 headings found
No structured data (JSON-LD) found

Careers

View careers page

Role	Location	Posted
About ISRG	—	—
Annual Reports	—	—
Radiant Award	—	—
Celebrating 10 Years	—	—
Divvi Up	—	—
Current Sponsors and Donors	—	—
Become a Sponsor	—	—
Get Involved	—	—
Donate now	—	—
Privacy Policy	—	—
Trademark Policy	—	—
Terms of Service	—	—
2025 Annual Report	—	—

Team

People listed on this site's own team or about page.

About Us

Let's Encrypt

About Let's Encrypt

Last updated: February 12, 2021

Legal Address

548 Market St, PMB 77519

Scan details

Requested URL: https://letsencrypt.org
Final URL: https://letsencrypt.org
HTTP status: 200
HTTP version: HTTP/2
Response time: 78 ms
HTML size: 87.9 KB
Redirect chain: https://letsencrypt.org

Frequently asked questions

What technology does letsencrypt.org use?: We did not detect any specific technologies for letsencrypt.org in the latest scan.
Is letsencrypt.org secure (HTTPS)?: Yes. letsencrypt.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 4, 2026.
Who hosts letsencrypt.org?: letsencrypt.org is hosted on AWS, behind Netlify CDN.
What is letsencrypt.org's SEO score?: letsencrypt.org scored 75/100 for SEO in the latest analysis (fair).
What is letsencrypt.org's overall website score?: letsencrypt.org has an overall SiteGraph score of 93/100, combining SEO, performance, security, and accessibility.
Is letsencrypt.org hiring?: Yes. letsencrypt.org has 13 open roles listed on their careers page.