Wordfence is the flagship product of Defiant Inc. Millions of WordPress site owners rely on Wordfence to protect their websites, their customer data and their investment. Install Wordfence today and lock down your WordPress site in minutes.


Our Story

Wordfence is incorporated as Defiant, Inc., a Delaware company. We are a small team that is passionate about software engineering and delivering excellent customer service. Wordfence has been downloaded over 90 million times, and is consistently one of the top plugins for WordPress on WordPress.org. The Wordfence WordPress Security plugin protects over 2 million active WordPress websites.

Explore Defiant

Notable Research Coverage

Hackers Exploit Recent WordPress Plugin Bugs for Malvertising

Bleeping Computer

Sergiu Gatlan

July 22, 2019

Critical Bug in WordPress Plugin Lets Hackers Execute Code

Bleeping Computer

Sergiu Gatlan

July 15, 2019

WordPress Users Urged to Delete Zero-Day-Ridden Plugin


Lindsey O'Donnell

January 28, 2019

General Business Inquiries

Do you have a press inquiry or want to ask about partnerships, a feature or idea or other general business inquiries?

Let's Talk

Check Out The Latest From Our Blog

High Severity Vulnerability Patched in WP Maintenance Plugin

November 19, 2019

Chloe Chamberland

Description: Cross-Site Request Forgery to Stored Cross-Site Scripting CVSS v3.0 Score: 8.8 (High) CVSS Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:H Affected Plugin: WP Maintenance Plugin Slug: wp-maintenance Affected Versions: <= 5.0.5 Patched Version: 5.0.6 On November 15th, 2019, our Threat Intelligence team identified a vulnerability present in WP Maintenance, a WordPress plugin with approximately 30,000+ active installs. This flaw allowed …
Read More

Podcast Episode 55: Yoast’s Marieke van de Rakt & Michiel Heijmans at WordCamp US

November 14, 2019

Kathy Zant

At WordCamp US in Saint Louis, Mark sat down with Yoast CEO Marieke van de Rakt and COO Michiel Heijmans in the Wordfence booth to talk about not only how Yoast began, but also how they’ve grown to over 9 million active installations and the challenges of managing such a large user base. Marieke and …
Read More

Multiple Vulnerabilities Patched in Email Subscribers & Newsletters Plugin

November 13, 2019

Chloe Chamberland

A few weeks ago, our Threat Intelligence team identified several vulnerabilities present in Email Subscribers & Newsletters, a WordPress plugin with approximately 100,000+ active installs. We disclosed this issue privately to the plugin’s development team who responded quickly, releasing interim patches just a few days after our initial disclosure. The plugin team also worked with …
Read More

Podcast Episode 54: The Hacker Mindset at WordCamp US

November 08, 2019

Kathy Zant

Kathy Zant gave a presentation about The Hacker Mindset at WordCamp US 2019 in St. Louis. Learning to think like a hacker in the security realm is a big part of keeping your assets safe, and there are additional benefits. Kathy illustrates how the hacker mindset is much more than protecting your site. Thinking like …
Read More

WP-VCD: The Malware You Installed On Your Own Site

November 04, 2019

Mikey Veenstra

One of the most prevalent malware infections facing the WordPress ecosystem in recent weeks is a campaign known as WP-VCD. Despite the relatively long existence of the campaign, the Wordfence threat intelligence team has associated WP-VCD with a higher rate of new infections than any other WordPress malware every week since August 2019, and the …
Read More

Podcast Episode 53: WordCamp US 2019 Preview from St. Louis

October 31, 2019

Kathy Zant

Mark and Kathy connect in person on Halloween in St. Louis to talk about what’s happening at WordCamp US. We review what’s new at WCUS, some of the more interesting sessions, and all of the fun activities Wordfence is bringing to North America’s largest WordCamp. Kathy and Mark also tear down the 4th wall to …
Read More

View More Blog Posts