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protonmail.ch

https://protonmail.ch· First analyzed 19 May 2026· Updated 19 May 2026
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protonmail.ch
Desktop screenshot of protonmail.ch
Mobile screenshot of protonmail.ch
Mobile

Sponsored

Hosting Provider

Proton Technologies AG

IP Address

185.70.42.21

Site Location

🇨🇭 Plan-les-Ouates, Switzerlandvia schema_nap

Server Location

🇨🇭 Plan-les-Ouates, Switzerland

ASN

AS62371

Organization

Proton Technologies AG

Nameservers

ns2.protonmail.ch.ns3.protonmail.ch.ns1.protonmail.ch.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
812 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
581 KB
147 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

JAMstack
🔀 Hybrid
Frontend
Framework
Astro
Styling
Tailwind CSS
CMS
Strapi
Infrastructure
Hosting
Proton Technologies AG

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

2 Technologies Detected

Meta Frameworks

1
Astro

CSS Frameworks

1
Tailwind CSS

SEO Analysis

B78/100
25
4
1
Meta Tags8/15
Content10/12
Headings8/8
Technical25/25
E-E-A-T2/7
Images5/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
P
protonmail.chprotonmail.ch

Proton Mail: Get a free email account with privacy and encryption |...

Proton Mail is the world’s largest secure email service with over 100 million users. Available on Web, iOS, Android, and desktop. Protected by Swiss privacy ...

Title truncated. Description truncated.
Title Length74 chars

Recommended: 50-60 chars (~450px / 580px)

Description Length161 chars

Recommended: 120-160 chars

Issues (1)

  • • Title is too long (74 chars, ~450px). Will be truncated in search results.

5 issues found

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Crawlability

Sitemap

Type: index

23 URLs

23 sub-sitemaps

robots.txt

6 rules

Sitemap reference found

Local SEO

Local Search Readiness

25/100
Needs Work
7 13 1

Sponsored

AI & LLM Readiness

C60/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
11/25
Citation
16/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
nav
Text ratio:4%
Words:1,798
Token eff.:Optimal
Sections/1K:5
Depth:1/5

Structured Data

5 JSON-LD
FAQPage×1.5Person×1.3WebSite
sameAs entity links

Citation Readiness

Opening Summary27w
Descriptive Headingsavg 4.5w
Canonical URL
Open Graph3/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (7)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
A
87/100
14
Passed
1
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
8/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
67/100
A
72 mg
CO₂e / view
581.5 KB
Page Weight
80%
Cleaner Than
New Visitor
82 mg
vs
Returning (cached)
41 mg
Annual (10K/mo)
8.6 kg
Emission Segments
Data Center
16 mg
Network
17 mg
Device
39 mg
Resource Breakdown
JavaScript
338.0 KB
Images
1.9 KB
CSS
49.2 KB
Fonts
159.6 KB
HTML
32.4 KB
Other
300 B
Green Hosting Not Verified
Proton Technologies AG
4 recommendations
  • •Carbon footprint recommendation preview...
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B

Security Score

71%Good
Interactive

HTTPS

No WAF

85d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

15.05.2026

Valid Until

13.08.2026

Subject Alternative Names (5)

*.pr.tn*.proton.me*.storage.proton.mepr.tnproton.me

SHA-256 Fingerprint

BD:53:89:C8:9A:5F:BA:76:2D:A6:B4:89:EB:99:43:86:5C:C7:81:6E...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
cache-control
🔴 No Cache(no-store, no-cache, must-revalidate, proxy-revalidate)
content-encoding
📦 Gzip(gzip)
content-length
32911
content-security-policy
default-src 'self'; media-src https://static.zdassets.com ht...
content-type
text/html; charset=utf-8
Good Warning Issue

Email Infrastructure

Proton Mail

Score

68

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mailsec.protonmail.ch
mail.protonmail.ch

Domain Information

protonmail.ch

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
A
89/100
Mobile Friendly5 breakpoints
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1, shrink-to-fit=no

Typography & Readability

ProtonSerif + ProtonSans

WCAG AA
81/100
Readability
/30
24/30

18px · LH 1.50

Hierarchy
/20
16/20

3x ratio · ✓ H1→H6

WCAG
/25
21/25

4.76:1 min contrast

Performance
/25
20/25

2 fonts · 3 req

Heading Font

ProtonSerif

Serif54px

Body Font

ProtonSans

Sans18px

Contrast Ratio

4.76:1

WCAG AA (≥4.5:1)

Reading Comfort

~37 CPL

Narrow lines
54px
h1
54px
h2
41px
h3
18px
p

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.8:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

Buy on MyFontsFlesch 48

Color Palette

4 unique colors
Light
#ffffff
Primary· 87.60000000000001%
#bebbcc
Secondary· 4.6%
#6f58a1
Secondary· 4%
#e7e7f0
Secondary· 3.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

3 Resources

1
Scripts
2
Styles
0
Async
0
Defer

Top Script Sources

local(1)

Website Identity

Proton

Proton

Corporation

Proton provides easy-to-use encrypted email, calendar, cloud storage, password manager, and VPN services, built on the principle of your data, your rules.

proton.me

Route de la Galaise 32, Plan-les-Ouates

1228, Plan-les-Ouates, Geneva

Switzerland

Location detected: 🇨🇭 Switzerland, Plan-les-Ouatesvia schema_nap
📧 Proton MailenEst. 2014

Sponsored

Last analyzed: 19 May 2026 at 16:02

Historical Analysis & Change Tracking