Mattermost.com Mattermost: Open Source, Self-hosted Slack Alternative

Enterprise team collaboration and messaging that deploys on-premise or to cloud infrastructure under IT control.

Mattermost.com Overview

Mattermost.com is a website providing a communication and collaboration tool for enterprise teams that can be self-hosted in a private or public cloud environment, allowing IT departments to have complete control over their data. The site hosts a value of 1229760 US dollars and has an impressive number of visits, with 142356 unique users and 854136 pageviews per day.

A notable feature of the website is its simple yet professional design, which reflects the platform's target audience of businesses, corporations, and organizations. It is evident that Mattermost strives to provide an effective and reliable means of communication rather than focusing on flashy graphics or visual effects. The website's color scheme is consistent with the platform's logo, featuring shades of blue and white.

The homepage provides an insightful overview of the product, its features, and its advantages. The site's menu is accessible at the top of the screen, with options to 'Download,' 'Docs,' 'Community,' 'Pricing,' and 'Blog.' There is also a button that facilitates a free trial of the platform.

One of the site's most useful features is its 'Docs' section, which provides extensive documentation for installation, administration, and configuration of the platform. The site's 'Community' section connects users with Mattermost's community forums, where users can interact with each other to learn, share, and resolve problems.

There is no objectionable content on the website, nor is it marketed to a specific age group, making it family-friendly. The website's SSL certificate is issued by Let's Encrypt, indicating that the website is legitimate and safe to browse.

Mattermost.com could improve its page speeds as it currently scores 47 in Google's PageSpeed Insights. Nevertheless, this does not detract from the overall user experience. It is clear that Mattermost's focus is on providing an efficient collaboration and messaging tool for enterprise teams rather than a flashy website design.

In summary, Mattermost.com offers a powerful communication and collaboration tool that is an excellent alternative to Slack. By allowing self-hosting, Mattermost ensures that organizations have complete control over their data. The website is professional, easy to navigate, and family-friendly, with extensive documentation provided to assist with platform installation and management.

Mattermost.com Website Safety

Overview

Last Updated: 04/02/2025

Unknown status.

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Last Updated: 03/22/2025

mattermost.com is safe.

Norton ConnectSafe evaluates mattermost.com for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 04/02/2025

Unknown status.

SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.

Google Safe Browsing

Last Updated: 01/09/2019

mattermost.com is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.

Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

Site Advisor

Last Updated: 02/23/2021

mattermost.com is safe.

McAfee assesses mattermost.com for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze mattermost.com for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 04/02/2025

mattermost.com child safety is unknown.

The WOT calculates reputation of the mattermost.com. This reputation system receives ratings from users and information from third-party sources, assesses the mattermost.com for safety features and confirms, whether mattermost.com is suitable for children.

SSL Information

SSL Checker Tool

Domain	mattermost.com
Issuer Organization	Google Trust Services
Issuer	WE1
Algorithm	ecdsa-with-SHA256
Valid form	09/04/2024
Expiration	12/03/2024
Signed	Certificate is not self signed
Additional Domains	mattermost.com

Mattermost.com Rank History

Alexa Rank shows how popular mattermost.com is in comparison with other sites. The most popular site has Alexa Rank equals 1. If mattermost.com has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to mattermost.com and pageviews on mattermost.com over the past 3 months.

Mattermost.com Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 209242

ASN Title: CLOUDFLARESPECTRUM Cloudflare, Inc., GB

Last Update: 12/25/2024

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2020, American Registry for Internet Numbers, Ltd.
#

No match found for a 209242.

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2020, American Registry for Internet Numbers, Ltd.
#

Mattermost.com Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

Domain Name: MATTERMOST.COM
Registry Domain ID: 1768225388_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.godaddy.com
Registrar URL: http://www.godaddy.com
Updated Date: 2021-12-23T18:09:49Z
Creation Date: 2012-12-22T21:48:04Z
Registry Expiry Date: 2022-12-22T21:48:04Z
Registrar: GoDaddy.com, LLC
Registrar IANA ID: 146
Registrar Abuse Contact Email: abuse@godaddy.com
Registrar Abuse Contact Phone: 480-624-2505
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Name Server: NS-1187.AWSDNS-20.ORG
Name Server: NS-2017.AWSDNS-60.CO.UK
Name Server: NS-358.AWSDNS-44.COM
Name Server: NS-517.AWSDNS-00.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2022-05-17T16:43:20Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL
mattermost.com	141.193.213.21	30
mattermost.com	141.193.213.20	30

Host	MX Record	Priority	TTL
mattermost.com	aspmx.l.google.com	1	300
mattermost.com	alt2.aspmx.l.google.com	5	300
mattermost.com	alt4.aspmx.l.google.com	10	300
mattermost.com	alt1.aspmx.l.google.com	5	300
mattermost.com	alt3.aspmx.l.google.com	10	300

Host	NS Record	TTL
mattermost.com	ns-517.awsdns-00.net
mattermost.com	ns-358.awsdns-44.com
mattermost.com	ns-1187.awsdns-20.org
mattermost.com	ns-2017.awsdns-60.co.uk

Host	TXT Record	TTL
mattermost.com	google-site-verification=fpg75vrAAEIJT0BiDewR1HEH5611FtlQ5KRxsy58Ggc	300
mattermost.com	zoom-domain-verification = a01dfc66-e456-447a-b934-2b969d7b6efc	300
mattermost.com	ahrefs-site-verification_790ea9d1fa7df7bb79ecb01475bbd3a2af899af172f9822a21e777b54405d4db	300
mattermost.com	ca3-82e664ed1fc24cebbbb05a1a313a2509	300
mattermost.com	rippling-domain-verification=33f949edf69a79ac	300
mattermost.com	stripe-verification=59bc3855e68c5b907a2df3e1af10b366644e91a66e9ad6d948be17752bdbf7ff	300
mattermost.com	reachdesk-verification=DqKUFJh3GNqCB9J9jncSb3egiPcJmot64fCeQTzn7n7ZLryKJd0lAxIFxir9WrG5	300
mattermost.com	atlassian-domain-verification=RZDq/y7zdkcxaTHPiQ0C380+nmga2WANU5gtYZX6d7SIDE3ekH3yeQi3cK6JaO7T	300
mattermost.com	zapier-domain-verification-challenge=9b84646c-a3f2-430e-8c16-72fe2f1711fe	300
mattermost.com	pardot_339921_*=f4d50871fea05db4cc87a9e9aa231286dce8b2856b2328a328f2197e092be1e9	300
mattermost.com	jeAj6DZrGcVpMYme-PB9a2ZNHZU	300
mattermost.com	docusign=c1011fa8-6799-4bbd-ad54-4de0133fd846	300
mattermost.com	onetrust-domain-verification=e49f201a265c4f8390f60e1f36563927	300
mattermost.com	apple-domain-verification=vBZgwPL4UydXcsrO	300
mattermost.com	yandex-verification:305251875afaea25	300
mattermost.com	MS=ms60509193	300
mattermost.com	pardot_339921_*=63b0e49c64dbef65c59685c5a82ade44fa3f8e43385555e89a12cd4265b44b4d	300
mattermost.com	v=spf1 include:_spf.google.com include:amazonses.com include:servers.mcsv.net include:mail.zendesk.com include:mailsenders.netsuite.com include:_spf.salesforce.com include:sendgrid.net include:mailgun.org include:mktomail.com include:spf.mailjet.com -all	300

ns-517.awsdns-00.net
TTL: 855
Email address: awsdns-hostmaster.amazon.com
Serial: 1
Refresh: 7200
Retry: 900
Expire: 1209600
Minimum: 86400

Mattermost.com HTML Check

HTML Validation Tool

Errors

Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.

A document must not include more than one “meta” element with its “name” attribute set to the value “description”.

Bad value “” for attribute “name” on element “input”: Must not be empty.

Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)

Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.

Bad value “475px” for attribute “height” on element “iframe”: Expected a digit but saw “p” instead.

The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.

Bad value “” for attribute “width” on element “img”: The empty string is not a valid non-negative integer.

Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.

Warnings

The “language” attribute on the “script” element is obsolete. You can safely omit it.

Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)

The “main” role is unnecessary for element “main”.

Empty heading.

The “contentinfo” role is unnecessary for element “footer”.

Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.

Mattermost.com Desktop Performance

Last tested: 09/23/2018

Desktop Speed

79%

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Leverage browser caching

Optimize images

Enable compression

Minify JavaScript

Reduce server response time

Minify CSS

Desktop Resource Breakdown

Total Resources	97
Number of Hosts	18
Static Resources	75
JavaScript Resources	35
CSS Resources	13

Mattermost.com Mobile Insights

Last tested: 08/08/2018

Mobile Usability

99%

Size tap targets appropriately

Mobile Speed

47%

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Leverage browser caching

Enable compression

Minify JavaScript

Reduce server response time

Minify CSS

Optimize images

Mobile Resource Breakdown

Total Resources	97
Number of Hosts	20
Static Resources	73
JavaScript Resources	39
CSS Resources	14

Mattermost.com Common Typos

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Mattermost.com Mattermost: Open Source, Self-hosted Slack Alternative

Enterprise team collaboration and messaging that deploys on-premise or to cloud infrastructure under IT control.

Mattermost.com Overview

Mattermost.com Website Safety

Mattermost.com Rank History

Mattermost.com Hosting Information

Mattermost.com Domain Registration and Settings

Mattermost.com HTML Check

Mattermost.com Desktop Performance

Mattermost.com Mobile Insights

Mattermost.com Similar Audits

Mattermost.com Common Typos