Is slack.com legit?
This site is highly trusted, showcasing robust security measures, clear identity, and strong online presence. While there are a few minor areas for improvement, like the use of a free SSL issuer and lack of structured data, these do not detract from its overall trustworthiness.
SaaS average: 81/100 · based on 62 sites
Checked: April 21, 2026 at 6:16 AM UTC
Is slack.com a scam? Here's what we found.
The site demonstrates strong security with a valid, current SSL certificate, modern TLS 1.3 encryption, and robust clickjacking protection. While Let's Encrypt is a free issuer and certificate transparency logs were unavailable, these are minor points for such an established service, and Google Web Risk confirms no threats.
Slack.com boasts an impressively old domain, registered for over 33 years, indicating a long-term, stable presence. The domain is registered through MarkMonitor Inc., a reputable registrar commonly used by large corporations, and has a comfortably far expiry date.
With a top Tranco rank, extensive web archive history spanning 27 years, and a clean DNS blacklist record, Slack.com has an excellent and established reputation. The lack of a Trustpilot profile is a minor omission given its global recognition.
The website provides clear contact information, comprehensive branding, and a presence on multiple social media platforms, fostering good transparency. The absence of structured data and a Trustpilot profile are small misses in an otherwise open communication approach.
The presence of both a privacy policy and terms of service pages demonstrates a commitment to legal and user compliance. The site also utilizes robots.txt and a sitemap for better indexing and management, contributing to general web standards.
The site's infrastructure is well-maintained, featuring robust DNS resolution across multiple IPs, strong email authentication (SPF, DMARC), and DNSSEC for added security. While Apache is a widely used server, there are more modern web servers available that offer potential performance or security advantages, but this is a minor concern.
Signals Detected
This is one of the most visited websites globally
No structured data markup found
Valid certificate, expires in 73 days
Certificate issued by Let's Encrypt
Connection uses TLS 1.3
Domain created 1992-10-21T04:00:00Z (33 years, 11 months ago)
Registered through MarkMonitor Inc.
Expires in 546 days
DNSSEC status from WHOIS
This business has no Trustpilot presence — not unusual for smaller or newer companies
Resolves to: 3.68.124.95, 52.29.238.212, 3.68.170.153, 18.159.197.225, 3.68.175.98, 3.68.124.168
Mail servers: aspmx.l.google.com., alt2.aspmx.l.google.com., alt1.aspmx.l.google.com., aspmx3.googlemail.com., aspmx2.googlemail.com.
Domain has SPF email authentication configured
Domain has DMARC email authentication configured
DNS providers: ns-166.awsdns-20.com., ns-606.awsdns-11.net., ns-1493.awsdns-58.org., ns-1901.awsdns-45.co.uk.
robots.txt has 19 directives and references a sitemap
Site maintains a proper sitemap with 13 indexed pages
Site has custom branding and social media metadata
Site enforces HTTPS via HSTS
X-Frame-Options: SAMEORIGIN
Web server: Apache
No threats detected by Google Web Risk
Website is live and responding
Website appears to have contact information
Website has both privacy policy and terms of service pages
Website links to multiple social media platforms
Earliest archive snapshot from 19981206
Not found on any DNS blacklists
Could not query certificate transparency logs
Fast page load
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