lennysnewsletter.com

Lenny's Newsletter | Substack

Last scanned Jul 27, 2026, 1:43 PM · 1 view

89

Overall score

Great

Summary

Deeply researched product, growth, and career advice for product leaders, founders, and ambitious builders. This website uses Express hosted on Cloudflare 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.

Deeply researched product, growth, and career advice for product leaders, founders, and ambitious builders. Click to read Lenny's Newsletter, a Substack publication with millions of subscribers.

United States

Hosted on Cloudflare

Top issues to fix

4 issues found

Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

85

SEO

2 issue(s) found

90

Performance

261 ms

85

Security

HTTPS & header checks

100

Accessibility

0 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.

Deeply researched product, growth, and career advice for product leaders, founders, and ambitious builders. Click to read Lenny's Newsletter, a Substack publication with millions of subscribers.

Meta tags

Title: Lenny's Newsletter | Substack
Description: Deeply researched product, growth, and career advice for product leaders, founders, and ambitious builders. Click to read Lenny's Newsletter, a Substack publication with millions of subscribers.
Canonical: https://www.lennysnewsletter.com/
Language: en
Charset: utf-8
Viewport: width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0, viewport-fit=cover
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Express Node.js Google Analytics Cloudflare Analytics

Hosting & CDN

Hosting provider: Cloudflare
CDN provider: Cloudflare
IP address: 104.21.38.198
ASN: AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)

DNS records

Type	Value
A	104.21.38.198 172.67.138.33
AAAA	2606:4700:3035::6815:26c6 2606:4700:3037::ac43:8a21
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	Yes

TLS / SSL certificate

Version: TLS 1.3
Issuer: Google Trust Services
Subject: www.lennysnewsletter.com
Valid from: Jul 1, 2026
Valid to: Sep 29, 2026
Days until expiry: 63
SAN domains: www.lennysnewsletter.com

Security headers

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

Compression: gzip · 3 cookie(s) observed

Content & assets

Headings

H1 1 · H2 0 · H3 0

Links

0 internal · 3 external · 0 broken

Images

1 total · 0 missing alt

Scripts / Styles

171 scripts · 19 stylesheets

JS / CSS size

448 KB · 710 KB

Page size

112 KB

Robots.txt & Sitemap

robots.txt: Found
Disallow rules: 15
sitemap.xml: Found
URLs in sitemap: 1213

SEO issues

Meta description longer than 160 characters
No structured data (JSON-LD) found

Scan details

Requested URL: https://lennysnewsletter.com
Final URL: https://www.lennysnewsletter.com
HTTP status: 200
HTTP version: HTTP/2
Response time: 259 ms
HTML size: 112 KB
Redirect chain: https://lennysnewsletter.com → https://www.lennysnewsletter.com

See something wrong on this report? Request a correction

Same technology stack

lettersofnote.com

Letters of Note | Shaun Usher | Substack

expressgoogle-analyticscloudflare-analytics

Cloudflare· Cloudflare

foreca.com

Weather - Foreca.com

expressgoogle-analyticscloudflare-analytics

Cloudflare· Cloudflare

foreigndekho.com

Best Trusted Visa Refusal Help | 190+ Countries | ForeignDekho - India's #1 Visa Consultancy

expressgoogle-analyticscloudflare-analytics

Cloudflare· Cloudflare

astralcodexten.com

Astral Codex Ten | Scott Alexander | Substack

expressgoogle-analyticscloudflare-analytics

Cloudflare· Cloudflare

sq.com.ua

Status Quo | Новости Харькова. Последние новости Харькова. Главные новости Харькова

angularexpressgoogle-analytics

Cloudflare· Cloudflare

viddler.com

Viddler | Video Hosting: Upload, Embed, and See Who Watched

expressgoogle-analyticscloudflare-analytics

Cloudflare· Cloudflare

Same hosting provider

atlan.com

Atlan - The Context Layer for AI

plausiblemeta-pixelgoogle-analytics

Cloudflare· Cloudflare

pharmerica.com

PharMerica - Long-Term Care Pharmacy Services

wordpresswoocommercejquery

Cloudflare· Cloudflare

ai-analytics.org

AI Analytics

nextjscloudflare-analytics

Cloudflare· Cloudflare

simplenet.ro

Simplenet oferă găzduire specializată WordPress din 2012

wordpresswoocommerce

Cloudflare· Cloudflare

complyadvantage.com

ComplyAdvantage | AI-driven fraud & AML risk detection

wordpressgoogle-analyticsjquery

Cloudflare· Cloudflare

arxivlens.com

ArxivLens - AI-Powered Academic Paper Search | arXiv...

cloudflare-analyticsjquerytailwindcss

Cloudflare· Cloudflare

Frequently asked questions

What technology does lennysnewsletter.com use?: lennysnewsletter.com is built with Express, Node.js, Google Analytics, Cloudflare Analytics.
Is lennysnewsletter.com secure (HTTPS)?: Yes. lennysnewsletter.com uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 29, 2026.
Who hosts lennysnewsletter.com?: lennysnewsletter.com is hosted on Cloudflare, behind Cloudflare CDN.
What is lennysnewsletter.com's SEO score?: lennysnewsletter.com scored 85/100 for SEO in the latest analysis (great).
What is lennysnewsletter.com's overall website score?: lennysnewsletter.com has an overall SiteGraph score of 89/100, combining SEO, performance, security, and accessibility.