Sites like ModSecurity

01 · Entity

About ModSecurity

ModSecurity modsecurity.org

ModSecurity Project – Open-Source Web Application Firewall

Protect your websites and apps with ModSecurity, the OWASP-backed open-source WAF trusted to stop threats. Upgrade your security today.

Wikidata: web application firewall (WAF) module

Top 10K · #5,075 English 3 technologies Crawled Nov 6, 2026

Visit ModSecurity

Summary by Claude

Project site for ModSecurity, a free open-source web application firewall engine for Apache, nginx and IIS that filters and logs HTTP traffic using a rules language, maintained under the OWASP Foundation alongside the Core Rule Set.

Who it’s for

System administrators, security engineers, WAF vendors

Business model

Open-source project (nonprofit)

• web application firewall
• open-source WAF
• Apache module
• nginx WAF
• OWASP Core Rule Set
• HTTP traffic logging
• security rules language
• virtual patching
• libmodsecurity v3

02 · Embedding space

Competitor map

Each alternative by how close its vector is to ModSecurity’s (x) and how much traffic it gets, how much of the stack it shares, or where it sits in the embedding space itself (y). Lines split each axis at the median. Hover for the numbers, click to jump to it in the list.

1. 01
   OWASP owasp.org Top 10K English

   OWASP Foundation - The Open Source Foundation for Application Security

   OWASP is the nonprofit behind the Top 10, ASVS, ZAP, and hundreds more free application security projects. Explore our tools, standards, local chapters, global events, and news from a community of 250+ chapters worldwide.

   • Cloudflare DNS
   • Amazon SES
   • Atlassian
   • Google Search Console
   • Google Workspace
   • Mailchimp

   0 say OWASP is a good alternative to ModSecurity 0 say OWASP isn’t a real alternative to ModSecurity

   Comment
   Close cos 0.893
2. 02
   nginx nginx.org Top 100

   nginx

   open source web server and a reverse proxy server

   • Google Search Console
   • nginx

   0 say nginx is a good alternative to ModSecurity 0 say nginx isn’t a real alternative to ModSecurity

   Comment
   Close cos 0.891
3. 03
   squid-cache.org Top 10K

   squid : Optimising Web Delivery

   proxy server and web cache daemon

   • Apache HTTP Server
   • Google Search Console

   0 say squid-cache.org is a good alternative to ModSecurity 0 say squid-cache.org isn’t a real alternative to ModSecurity

   Comment
   Close cos 0.882
4. 04
   PHP php.net Top 1K English

   PHP

   PHP is a popular general-purpose scripting language that powers everything from your blog to the most popular websites in the world.

   • bunny.net
   • Font Awesome
   • Google Search Console
   • jQuery
   • Matomo

   0 say PHP is a good alternative to ModSecurity 0 say PHP isn’t a real alternative to ModSecurity

   Comment
   Close cos 0.885
5. 05
   Modrinth modrinth.com Top 10K English

   Modrinth

   Download Minecraft mods, plugins, datapacks, shaders, resourcepacks, and modpacks on Modrinth. Discover and publish projects on Modrinth with a modern, easy to use interface and API.

   • Cloudflare
   • Cloudflare DNS
   • bunny.net
   • Cloudflare Web Analytics
   • Google Search Console
   • Google Workspace

   0 say Modrinth is a good alternative to ModSecurity 0 say Modrinth isn’t a real alternative to ModSecurity

   Comment
   Close cos 0.881
6. 06
   Laravel laravel.com Top 10K English

   Laravel - The clean stack for Artisans and agents

   Laravel is a framework for building modern web apps and AI agents. Expressive syntax, built-in tools, and everything you need to ship fast.

   • Cloudflare
   • Cloudflare DNS
   • Algolia
   • Apple Business
   • Atlassian
   • Fathom

   0 say Laravel is a good alternative to ModSecurity 0 say Laravel isn’t a real alternative to ModSecurity

   Comment
   Close cos 0.878
7. 07
   Moodle moodle.org Top 10K

   Moodle challenge

   e-learning platform

   • Cloudflare
   • Cloudflare DNS
   • Amazon SES
   • Google Search Console
   • Google Workspace
   • Mailchimp Transactional

   0 say Moodle is a good alternative to ModSecurity 0 say Moodle isn’t a real alternative to ModSecurity

   Comment
   Close cos 0.879
8. 08
   apachefriends.org Top 10K English

   XAMPP Installers and Downloads for Apache Friends

   XAMPP is an easy to install Apache distribution containing MariaDB, PHP and Perl.

   • Cloudflare DNS
   • Fastly
   • cdnjs
   • Font Awesome
   • GitHub Pages
   • Google Analytics

   0 say apachefriends.org is a good alternative to ModSecurity 0 say apachefriends.org isn’t a real alternative to ModSecurity

   Comment
   Close cos 0.875
9. 09
   AMP ampproject.org Top 1K English

   AMP - a web component framework to easily create user-first web experiences - amp.dev

   Whether you are a publisher, e-commerce company, storyteller, advertiser or email sender, AMP makes it easy to create great experiences on the web. Use AMP to build websites, stories, ads and emails.

   • GlobalSign
   • Google Search Console
   • Google Workspace
   • Netlify

   0 say AMP is a good alternative to ModSecurity 0 say AMP isn’t a real alternative to ModSecurity

   Comment
   Close cos 0.874
10. 10
    ngenix.net Top 1K Russian

    Доступ к сайту временно ограничен владельцем веб-ресурса.

    • GlobalSign
    • Google Search Console
    • nginx
    • Yandex Mail
    • Yandex Webmaster

    0 say ngenix.net is a good alternative to ModSecurity 0 say ngenix.net isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.876
11. 11
    Apache Software Foundation apache.org Top 1K English

    Welcome to The Apache Software Foundation | Apache Software Foundation

    American nonprofit open-source software community

    • Fastly
    • Apache HTTP Server
    • Atlassian
    • Bootstrap
    • GlobalSign
    • Google Search Console

    0 say Apache Software Foundation is a good alternative to ModSecurity 0 say Apache Software Foundation isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.875
12. 12
    phpMyAdmin phpmyadmin.net Top 10K English

    phpMyAdmin

    database administration tool

    • Google Analytics
    • Google Search Console

    0 say phpMyAdmin is a good alternative to ModSecurity 0 say phpMyAdmin isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.875
13. 13
    Hardened PHP hardened-php.net Top 10K English

    Hardened PHP - Hardened-PHP

    PHP is far and away the most popular backend programming language today, with more than 80 websites worldwide taking advantage of PHP solutions. All of the most popular CMS platforms – including WordPress, Joomla!, and Drupal (just to name a few) leverage this technology. It’s flexibility and versatility make it a powerhouse programming language, but […]

    • jQuery
    • nginx
    • PHP
    • WordPress

    0 say Hardened PHP is a good alternative to ModSecurity 0 say Hardened PHP isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.873
14. 14
    CISA cisa.gov Top 10K English

    Home Page | CISA

    Cybersecurity and Infrastructure Security Agency: America's Cyber Defense Agency

    • Adobe
    • Atlassian
    • Drupal
    • Google Fonts
    • Google Search Console
    • Google Tag Manager

    0 say CISA is a good alternative to ModSecurity 0 say CISA isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.873
15. 15
    Drupal drupal.org Top 10K English

    Client Challenge

    free and open-source web content management system

    • Fastly
    • Amazon SES
    • Atlassian
    • GlobalSign
    • Google Search Console
    • Mailchimp

    0 say Drupal is a good alternative to ModSecurity 0 say Drupal isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.873
16. 16
    Internet Systems Consortium isc.org Top 10K

    development and dissemination of internet software and tools

    • GlobalSign
    • Google Search Console
    • Mailchimp
    • Salesforce

    0 say Internet Systems Consortium is a good alternative to ModSecurity 0 say Internet Systems Consortium isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.870
17. 17
    freedesktop.org Top 10K English

    Checking you are not a bot

    open-source desktop environment software project

    • Apache HTTP Server
    • Google Search Console

    0 say freedesktop.org is a good alternative to ModSecurity 0 say freedesktop.org isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.870
18. 18
    Eclipse Foundation eclipse.org Top 10K English

    Eclipse Foundation | Powering Open Innovation

    The Eclipse Foundation hosts 450+ open source projects with vendor-neutral governance, enabling global collaboration in automotive, IoT, cloud, and emerging …

    • Google Fonts
    • Google Search Console
    • Google Tag Manager
    • HubSpot
    • Mailchimp
    • nginx

    0 say Eclipse Foundation is a good alternative to ModSecurity 0 say Eclipse Foundation isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.870
19. 19
    F5 f5.com Top 100 English

    Hybrid Multicloud App Security & Delivery for the AI Era | F5

    Unified delivery & security for applications, APIs, & AI workloads across any infrastructure, trusted by 85% of the Fortune 500. Secure your digital ecosystem.

    • Adobe
    • Apple Business
    • Atlassian
    • DocuSign
    • Dropbox
    • Google Search Console

    0 say F5 is a good alternative to ModSecurity 0 say F5 isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.868
20. 20
    Tor Project torproject.org Top 10K English

    Tor Project | Anonymity Online

    Anonymity Online | Defend yourself against tracking and surveillance. Circumvent censorship.

    • Apache HTTP Server
    • Bootstrap
    • Font Awesome
    • Google Search Console
    • jQuery

    0 say Tor Project is a good alternative to ModSecurity 0 say Tor Project isn’t a real alternative to ModSecurity

    Comment
    Close cos 0.868

Ranked by score: the cosine similarity of each site’s vector to modsecurity.org’s, less a small penalty for generic sites that are close to everything. Highlighted technologies are ones ModSecurity uses too. Votes and comments come from visitors and don’t change the ranking.

04 · Fingerprints

Technology

What ModSecurity is built with, and what its closest competitors use, from its homepage’s code and its DNS records.