Website reputation report

slack.com

Last checked 5 days ago · Point-in-time assessment

● Evidence is limited

What is this website?

slack.com is currently classified in the Software category based on observed public pages. An About page was also found. Recurring page-metadata topics include navigationclose, slackclose navigationclose, navigationclose navigation.

No listed local patterns observedHomepage-only analysis is not a malware clearance. Read the scope and findings below.

76/100Safety Score
70%Evidence Confidence
Trust Radar evidence profile Eight evidence dimensions from zero to one hundred. Exact values surround the chart. Threat Intelligence55 Domain History95 Infrastructure95 Website Security95 Security Hygiene70 Transparency57 Reputation50 Operational Stability85
Trust RadarEight observed factors. Select one to inspect its evidence.

How to read this report

Safety Score evaluates observed signals. Evidence Confidence measures how complete, direct, fresh, and consistent those signals are.

No automated scan can guarantee that a website is safe.

Independent evidence brief

What we observed about slack.com

Updated Sep 26, 2026

The latest scan examined 10 public pages on slack.com. Website descriptions below come from the site itself. Registration, connection and threat findings were checked separately.

Purpose and visible content

On its About page, the site says: Stay up to date with the latest Slack features and improvements.

Registrar and domain history

Registered on Oct 21, 1992. Registrar: MarkMonitor Inc..

Recorded expiry date: Oct 20, 2027. Registry data can change.

Connection and hosting evidence

The checked homepage returned HTTP 200 in about 1000 ms.

A valid TLS certificate was observed, expiring Nov 4, 2026.

Threat checks and score context

External malware-provider coverage was unavailable. The report does not treat this missing check as a clean result.

Safety Score: 76/100. Evidence Confidence: 70%. These measure different things.

Latest recorded material change: The captured website appearance changed.

Public content profile

Pages reviewed on slack.com

10 of up to 10 pages

We sampled public pages from this website to understand its subject and contact paths. The titles and short descriptions below come from the website itself. They are not endorsements or independent safety findings.

Hashtags found on the website: #bug · #7c3aed · #611f69 · #ffffff · #8b52f0 · #7c3085 . These are site-supplied labels, not search rankings.

Slack | AI Work Platform & Productivity ToolsClose NavigationClose NavigationHide announcementBoost productivity and save time with Slack‌ — ‌the AI work platform for managing projects, automating workflows, and connecting teams securely. Start working smarter today. What's New | SlackClose NavigationClose NavigationStay up to date with the latest Slack features and improvements. Slackbot, Personal AI Agent for Work | SlackClose NavigationClose NavigationHide announcementYour personal AI agent right in the flow of work with Slackbot. Prepare for meetings, analyze reports, and uncover insights without ever leaving Slack. Slack AI Features & AI Assistants | SlackClose NavigationClose NavigationBoost productivity with Slack's AI tool. Summarize chats, search files, take meeting notes, translate conversations, and automate workflows securely. Salesforce in Slack: Conversational CRM Collaboration | SlackClose NavigationClose NavigationReimagine CRM with Salesforce in Slack. Go beyond integrations with a native, conversational CRM experience that helps teams collaborate and act faster. Slack Channels: Team Group Chat for Work | SlackClose NavigationClose NavigationConnect teams instantly with online messaging channels. Simplify project updates using team collaboration and business communication tools with Slack AI. Slack Huddles: Conferencing & Video Call Platform | SlackClose NavigationClose NavigationConnect faster with Slack’s video meeting platform. Start a video chat, share screens, and collaborate in one virtual meeting app and online tool today. Slack Canvas: Collaborate & Curate in Workspaces | SlackClose NavigationClose NavigationUse canvas collaborations and canvas features to centralize team work. Manage canvas tasks easily in your workspace with intuitive management canvas tools. Slack Task Management: Lists & To Do's | SlackClose NavigationClose NavigationCreate, track, and manage task lists with powerful list tracking tools. Organize your project lists and every project task all in one place with ease. Slack Code: Where Building is a Team Sport | SlackClose NavigationClose NavigationHide announcementWhen you work with AI alone, your team can't chip in. Slack Code brings your team and AI agents together in Slack to build and ship code in a dedicated channel.

Public page evidence

Topics and keywords observed on slack.com

12 phrases

These phrases were extracted locally from sampled public page metadata. They are observations, not search-volume or ranking estimates.

navigationcloseTitle10 sampled pages
slackclose navigationcloseTitle9 sampled pages
navigationclose navigationTitle7 sampled pages
teamTitle, H1, Meta description5 sampled pages
platformTitle, Meta description2 sampled pages
collaborateTitle, Meta description3 sampled pages
featuresTitle, Meta description3 sampled pages
teamsMeta description3 sampled pages
toolsMeta description3 sampled pages
productivityTitle, Meta description2 sampled pages
manageH1, Meta description2 sampled pages
ai agentsH1, Meta description2 sampled pages

At a glance

Key findings

✓

Report is current

The displayed evidence comes from the published immutable scan.

i

Confidence is separate

Unavailable evidence is shown as missing and never counted as clean.

!

Verify before sensitive actions

Check the exact URL and context before payments, credentials, or downloads.

Fully explainable

Why this score?

Versioned weights
Threat IntelligenceWeight 25%
55/100

Threat providers were unavailable. The neutral uncertainty baseline is not a clean verdict.

Domain HistoryWeight 10%
95/100

Domain registration age and expiry were checked.

InfrastructureWeight 10%
95/100

Observed DNS records and network address were checked.

Website SecurityWeight 15%
95/100

Observed certificate validity and TLS protocol were checked.

Security HygieneWeight 15%
70/100

Observed security header values were checked for basic protective settings. Empty values, disabled HSTS and unrecognized values receive no credit. This is not a complete browser-policy validation.

TransparencyWeight 5%
57/100

Observed site metadata and About page were checked. Publisher-supplied details are not independently verified.

ReputationWeight 5%
50/100

Popularity is weak context, not proof of safety. Unranked sites use a neutral baseline.

Operational StabilityWeight 15%
85/100

Observed HTTP status and final connection scheme were checked.

Server-side analysis

Automated security checks

Homepage HTML only · Eight local rule families · local-security-v1

Checks use the fetched page and redirect chain. Scripts are not executed, forms are not submitted, and linked files are not downloaded. This is not a malware clearance.

No listed local patterns observed. The limited rule set cannot detect every threat or behavior.

External threat intelligence

Provider coverageNot checked

Local checks do not query external reputation databases. An unavailable check is never a clean result.

Registration

Domain information

Public RDAP observation
Canonical domainslack.com
RegistrarMarkMonitor Inc.
RegisteredOct 21, 1992
Domain age33 years
ExpiresOct 20, 2027
Registry statusesclient delete prohibited · client transfer prohibited · client update prohibited · server delete prohibited · server transfer prohibited · server update prohibited
Report statePublished

Infrastructure

Network & hosting

Observed endpoint, not legal location
IP address18.159.197.225
Autonomous systemUnavailable
Network organizationUnavailable
Observed countryUnavailable
CDNNot detected
Web application firewallNot detected

At a glance

Infrastructure summary

Observed during this scan

A compact view of the connection, DNS and security surface. These observations describe what the scanner could verify at scan time and do not prove ownership or ongoing availability.

HTTP response200 · https://slack.com/
Endpoint18.159.197.225
NetworkUnavailable
CDN and WAFNot detected · Not detected
DNS surface30 records · 4 nameservers · 5 mail exchangers
Protection signals4 security headers · 0 technologies · DNSSEC unknown

Page telemetry

Observed page statistics

Safe metadata only

These counters describe the fetched response and sampled HTML. Script counts describe references in the markup, not a complete browser network log. Cookie counts cover observed response headers.

Response size244,214 bytes
HTTP check duration1,000 ms
Cookies observedUnavailable
Script resourcesUnavailable · Unavailable external hosts
Frames and sampled checksUnavailable frames · Unavailable resources checked

Encrypted transport

TLS certificate

Valid when observed
StatusValid when observed
ProtocolTLSv1.3
IssuercountryName=US, organizationName=Let's Encrypt, commonName=YR1
Valid fromAug 6, 2026
Valid untilNov 4, 2026
Certificate names*.slack.com · slack.com

Resolution

DNS footprint

DNSKEY status unknown

DNSKEY presence does not verify the DNSSEC signature chain. Missing records can mean no record was returned or the lookup was unavailable.

A18.159.197.225TTL —
A3.68.124.168TTL —
A3.68.124.95TTL —
A3.68.170.153TTL —
A3.68.175.98TTL —
A52.29.238.212TTL —
NSns-1493.awsdns-58.orgTTL —
NSns-166.awsdns-20.comTTL —
NSns-1901.awsdns-45.co.ukTTL —
NSns-606.awsdns-11.netTTL —
MX1 aspmx.l.google.comTTL —
MX10 aspmx2.googlemail.comTTL —
MX10 aspmx3.googlemail.comTTL —
MX5 alt1.aspmx.l.google.comTTL —
MX5 alt2.aspmx.l.google.comTTL —
TXT_0vidyxobp6x350odqhb4fo7fdxhmtq3TTL —
CAA0 iodef "mailto:hostmaster@slack-corp.com"TTL —
CAA0 issue "digicert.com; account=455b15ed272bed097725c6ea50e89921fc57379c5338a29305c05771df65fff1"TTL —
CAA0 issue "letsencrypt.org; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1532134906"TTL —
TXTgoogle-site-verification=2PK67oVPNyEtS1avSlr3PhH5nSiFuticbQv_bT4pM2kTTL —
TXTgoogle-site-verification=efuXt5-oMr2CdNmVi6A9IO29KMKifpseD1qokxjWwcETTL —
TXTgoogle-site-verification=kB1KvgpSk9YkHsFmsj1VPI5YmDvfKctPxnplhGjyqtETTL —
TXTgoogle-site-verification=KqX3Ngw0XEjz_0GVx_xwFFlCoO-bskhqU_lxv0Q77mkTTL —
TXTgoogle-site-verification=o2grd1TLmZZ8GrqbhVIFtzO2MRLTtSUpBBIBYfhQVCQTTL —
TXTgoogle-site-verification=QvelFPjIOe3Vavw0q-aAVYaAPKmWCRjmmVVEAjgfjQcTTL —
TXTgoogle-site-verification=v-LLB__IhraaI7ZzuE3jvRFIm2vERPLzWoepAEZJtKQTTL —
TXThubspot-developer-verification=OTE4NzYxYTgtMDUwZi00MzgzLTk2YTUtZDAwNjBlODg1MWM0TTL —
TXTOSSRH-54733TTL —
TXTspycloud-domain-verification=02e4c0be-cf43-44e4-beaf-4f99702ca632TTL —
TXTv=spf1 include:_spf.qualtrics.com include:mail.zendesk.com include:_spfextra.slack.com -allTTL —

Responsible disclosure

security.txt

RFC 9116 observation

No readable security.txt file was observed at the standard locations. This is informational and is not evidence of malware.

Browser protections

Security headers

4 observed
cross-origin-opener-policypresent same-origin-allow-popups
referrer-policypresent no-referrer
strict-transport-securitypresent max-age=31536000; includeSubDomains; preload
x-frame-optionspresent SAMEORIGIN

Response headers

Cookie protections

Passive observation

No Set-Cookie header was observed on the sampled homepage response. Other pages may set cookies separately.

Detected stack

Technologies

Not confidently detected

Versions are shown only when publicly exposed by the page or response headers. An observed version is not, by itself, proof of a vulnerability.

JavaScript library advisories

JavaScript advisory analysis was not recorded for this scan.

About this website

What the site says about itself

Stay up to date with the latest Slack features and improvements.

View the site's About page ↗

This is publisher supplied information. The independent safety findings are shown separately.

Structured facts

Website identity & response

Public page metadata
Page titleSlack | AI Work Platform & Productivity ToolsClose NavigationClose NavigationHide announcement
First headingAll your people and AI agents working together.
DescriptionBoost productivity and save time with Slack‌ — ‌the AI work platform for managing projects, automating workflows, and connecting teams securely. Start working smarter today.
Canonical URLhttps://slack.com
Final URLhttps://slack.com/
HTTP response200 · text/html; charset=utf-8 · 1000 ms
Languageen-US
Structured typesNone observed

Connection path

Redirect chain

0 recorded hops

No redirect hop was recorded for the sampled homepage.

Premium monitoring

Catch downtime and security changes automatically

Regular checks, availability history, and alert emails are reserved for Premium websites. Free reports remain point-in-time scans and do not create recurring server work.

Enable monitoring for this website

Compared with the previous scan

What changed

Safety ScoreNo comparable score
HTTP statusUnavailable → 200
Final URL changedYes
Technologies addedNone observed
Technologies removedNone observed

This comparison uses persisted scan evidence only. A changed signal can reflect a real website change, a different response or newly available evidence.

Explainable matching

Digital fingerprint

fingerprint-v1
azure-shield-arc-570

Comparable components help find technically related websites. A match does not prove common ownership.

DnsHashed private comparison value
TechnologiesHashed private comparison value

Material changes only

Change history

The captured website appearance changed.

screenshot changed

Website icon for slack.com

Visual evidence

Website screenshot

Screenshot of slack.com
Earlier browser capture retained because this scan did not produce a usable replacement. It is not fresh scan evidence.

For site owners

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Questions about slack.com

FAQ

Still have questions? Contact us →
Is slack.com safe to visit?

The latest Safety Score is 76/100 with 70% Evidence Confidence. This is a point-in-time assessment of observed technical signals, not a guarantee. Check the exact address and avoid entering payment details if anything looks unusual.

Did the scan detect malware on slack.com?

External threat-provider coverage was unavailable for this scan, so malware status is unverified.

When was slack.com registered?

The public registry record shows Oct 21, 1992. Registration details may be privacy-protected or updated later.

Did slack.com have a valid TLS certificate?

The scanner observed a valid TLS certificate using TLSv1.3. A valid certificate alone does not establish that the site is safe.

How does slack.com describe itself?

The website's About page describes its purpose in the report above. This is publisher-supplied information and is separate from independent security findings.

Can a paid listing change this website's score?

No. Premium placement and owner-supplied pages are labelled separately. Technical evidence, the Safety Score and moderation decisions remain independent.