Back to Search
threema.com favicon

threema.com

https://threema.com· First analyzed 25 Apr 2026· Updated 25 Apr 2026
Export
threema.com
Desktop screenshot of threema.com
Mobile screenshot of threema.com
Mobile

Sponsored

Hosting Provider

Threema GmbH

IP Address

203.56.112.78

Site Location

🇨🇭 Switzerlandvia ip

Server Location

🇨🇭 Zurich, Switzerland

ASN

AS29691

Organization

Threema GmbH

Server

Nginx

Nameservers

ns1.threema.ch.ns2.threema.ch.ns5.threema.ch.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
614 ms10%
Speed Index
798 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
3.9 MB
84 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
Threema GmbH

Technology Stack

4 Technologies Detected

Frameworks

1
Alpine.js

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Nginx

SEO Analysis

B77/100
24
2
0
Meta Tags12/15
Content9/12
Headings8/8
Technical20/25
E-E-A-T0/7
Images6/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
T
threema.comthreema.com

Threema – Secure Communication For Individuals and Companies – Threema

The secure instant messenger from Switzerland. GDPR-compliant messaging for individuals and organizations that value security and data protection.

Title Length70 chars

Recommended: 50-60 chars (~432px / 580px)

Description Length146 chars

Recommended: 120-160 chars

Issues (0)

    2 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    3,298 URLs

    robots.txt

    3 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    13/100
    Poor
    4 12 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D43/100
    Bot Access
    20/25
    Machine Read.
    10/25
    Schema Data
    0/25
    Citation
    13/25

    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:2%
    Words:1,156
    Token eff.:Optimal
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary25w
    Descriptive Headings
    Canonical URL
    Open Graph2/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    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.
    B
    75/100
    10
    Passed
    2
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    16/20
    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
    0/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    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.
    27/100
    F
    488 mg
    CO₂e / view
    3.9 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    558 mg
    vs
    Returning (cached)
    279 mg
    Annual (10K/mo)
    58.6 kg
    Emission Segments
    Data Center
    109 mg
    Network
    117 mg
    Device
    262 mg
    Resource Breakdown
    JavaScript
    183.7 KB
    Images
    3.5 MB
    CSS
    175.5 KB
    HTML
    42.4 KB
    Other
    638 B
    Green Hosting Not Verified
    Threema GmbH
    6 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A+

    Security Score

    98%Excellent
    Static / Informational

    HTTPS

    No WAF

    70d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    Sectigo Limited

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-256

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    03.06.2025

    Valid Until

    04.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.threema.comthreema.com

    SHA-256 Fingerprint

    69:CC:B4:E6:05:E9:2C:DB:64:E3:6B:CE:B9:8F:00:08:C8:97:CD:00...

    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🟣 Private(private, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-security-policy
    default-src 'self'; style-src 'self' https://static.threema....
    content-type
    text/html; charset=utf-8
    date
    Sat, 25 Apr 2026 23:25:11 GMT
    expect-ct
    report-uri="https://3ma.ch/ctreport", max-age=31536000, enfo...
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    55

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    Domain Information

    threema.com

    Domain Age
    13y 6m

    Created

    21.10.2012

    Expires

    21.10.2026

    Last Updated

    22.10.2025

    Registrar

    COREhub, S.R.L.

    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.
    B
    79/100
    Mobile Friendly
    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
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Montserrat + Open Sans

    WCAG Partial
    76/100
    Readability
    /30
    24/30

    16px · LH 1.50

    Hierarchy
    /20
    20/20

    3x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    16/25

    2 fonts · 8 req

    Heading Font

    Montserrat

    Sans48px

    Body Font

    Open Sans

    Sans16px

    Contrast Ratio

    1:1

    14 issues

    Reading Comfort

    ~35 CPL

    Narrow lines
    48px
    h1
    30px
    h2
    20px
    h3
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

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

    ⚠️ Partial contrast: 14 elements below WCAG AA threshold (min 1.0:1).

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

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

    ⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

    Buy on MyFontsFluid Type

    Color Palette

    11 unique colors
    3.78:1 AA Large Light
    #ffffff
    Background· 28.6%
    #90807b
    Secondary· 6.2%
    #1a110a
    Primary· 15.2%
    #5c5047
    Secondary· 6.5%
    #6c6058
    Secondary· 6.5%
    #4c3e35
    Secondary· 6%
    #7f6c64
    Secondary· 5.5%
    #29211b
    Secondary· 3.3%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Matomo (Piwik)Mid-Market
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    1

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    5 Resources

    4
    Scripts
    1
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    threema.com(3)local(1)

    Website Identity

    threema.com

    13 years old
    Location detected: 🇨🇭 Switzerlandvia ip
    COREhub, S.R.L.en

    Sponsored

    Last analyzed: 25 Apr 2026 at 23:25

    Historical Analysis & Change Tracking