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slackhq.com

https://slackhq.com· First analyzed 30 Apr 2026· Updated 30 Apr 2026
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slackhq.com
Desktop screenshot of slackhq.com
Mobile screenshot of slackhq.com
Mobile

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Hosting Provider

Automattic, Inc

IP Address

192.0.66.2

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS2635

Server

Apache

Nameservers

ns04.slackdns.com.dns1.p03.nsone.net.dns2.p03.nsone.net.dns3.p03.nsone.net.+4 more

Performance

94

Core Web Vitals

Weight

First Contentful Paint
1.2 s10%
Speed Index
1.6 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
78 KB
38 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Automattic, Inc

Technology Stack

5 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics

Tag Managers

1
Google Tag Manager

Other

1
Optimizely

Web Servers

1
Apache

SEO Analysis

C69/100
21
7
1
Meta Tags9/15
Content10/12
Headings3/8
Technical20/25
E-E-A-T3/7
Images2/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
S
slackhq.comslackhq.com

Slack blog | Slack

Welcome to the official blog of Slack, your digital HQ. Discover the latest product news, innovations and workplace collaboration tips.

Title Length18 chars

Recommended: 50-60 chars (~102px / 580px)

Description Length135 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (19/25) — critical for accessibility and SEO

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

13 URLs

13 sub-sitemaps

robots.txt

19 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.

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AI & LLM Readiness

D53/100
Bot Access
20/25
Machine Read.
17/25
Schema Data
0/25
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.txtvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
nav
Text ratio:6%
Words:1,236
Token eff.:Optimal
Sections/1K:10.5
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary214w
Descriptive Headingsavg 9.1w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (8)
AI readiness recommendation preview...
Upgrade to view recommendations

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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
13
Passed
2
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
15/20
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
13/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

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.
65/100
A+
10 mg
CO₂e / view
78.2 KB
Page Weight
95%
Cleaner Than
New Visitor
11 mg
vs
Returning (cached)
6 mg
Annual (10K/mo)
1.2 kg
Emission Segments
Data Center
2 mg
Network
2 mg
Device
5 mg
Resource Breakdown
JavaScript
3.5 KB
Images
54.1 KB
HTML
20.6 KB
Green Hosting Not Verified
Automattic, Inc
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

51%Poor
Interactive

HTTPS

No WAF

63d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

04.04.2026

Valid Until

03.07.2026

Subject Alternative Names (2)

*.slack.comslack.com

SHA-256 Fingerprint

67:BE:C3:76:96:A8:04:37:9F:9A:CA:DB:BD:75:F7:73:92:FE:15:7A...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, quic=":443"...
content-encoding
⚡ Brotli(br)
content-length
20787
content-type
text/html; charset=utf-8
date
Thu, 30 Apr 2026 14:51:07 GMT
referrer-policy
no-referrer
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

53

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

Domain Information

slackhq.com

Domain Age
13y 1m

Created

26.03.2013

Expires

26.03.2027

Last Updated

22.02.2025

Registrar

MarkMonitor Inc.

DNSSEC
Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner
OneTrust
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: OneTrust
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.
C
68/100
Mobile Friendly1 breakpoint
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

Times New Roman

WCAG AAA
73/100
Readability
/30
21/30

16px · LH --

Hierarchy
/20
14/20

2x ratio

WCAG
/25
24/25

9.4:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Times New Roman

Serif32px

Body Font

Times New Roman

Serif16px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~41 CPL

Narrow lines
32px
h1
19px
h3
16px
p

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

❌ Very complex text: Flesch score 30/100. Consider shorter sentences and simpler words.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 30

Color Palette

8 unique colors
Light
#ffffff
Background· 92.6%
#969ace
Primary· 2.2%
#b3b3d9
Secondary· 1.6%
#dadee9
Secondary· 0.9%
#cccce0
Secondary· 0.9%
#f0eef2
Secondary· 0.8%
#837eb2
Secondary· 0.7%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

1
OneTrustEnterprise

Cookie consent and privacy compliance tools

2

Categories

3

Total Tools

1

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

22 Resources

15
Scripts
7
Styles
1
Async
0
Defer

Top Script Sources

a.slack-edge.com(13)cdn.cookielaw.org(1)reveal.clearbit.com(1)

Website Identity

slackhq.com

13 years old
Location detected: 🇺🇸 United Statesvia ip
MarkMonitor Inc.en-GB

Sponsored

Last analyzed: 30 Apr 2026 at 14:51

Historical Analysis & Change Tracking