SiteLock vs Wordfence: Which Security Plugin is Actually Better?

You are staring at your WordPress dashboard and wondering if your site is actually secure. Most site owners rely on popular security plugins like Wordfence or SiteLock, assuming that a basic installation provides total coverage.

You might be asking yourself why your site still feels sluggish, why you are getting false positives, or worse, why your WordPress security plugin failed to stop an infection that cost you days of downtime.

This creates a dangerous false sense of security that leaves your business exposed to exploits.

We at MalCare decided to cut through the marketing noise. We purposefully infected several test websites with malware to measure the actual efficacy of these plugins in a controlled environment. The results reveal that most solutions are either resource-heavy drains on your server or fundamentally incapable of detecting modern, obfuscated threats.

Summary of SiteLock vs Wordfence comparison

Navigating the choice between these two security heavyweights requires an understanding of their fundamental architectural differences.

Wordfence operates as an endpoint solution, providing deep file-level visibility but at the cost of significant server-side resource usage. This approach excels in detecting known threats through signature-matching, though it often leads to performance bottlenecks that can impact your site speed and Core Web Vitals.

SiteLock 2.0 takes a different path by offloading security tasks to the cloud. This architecture preserves server resources, yet our testing consistently reveals that its detection engine lacks the precision required for modern, complex WordPress threats. While SiteLock offers a unified site health score and simplifies management, it frequently misses backdoors that are critical to securing a compromised site.

Ultimately, both plugins face recurring challenges. Users in developer forums frequently highlight that Wordfence struggles with resource-intensity and false positives, while SiteLock’s automated tools are often hampered by configuration friction and inadequate detection.

For site owners, the decision rests on whether you prioritise the granular, albeit resource-heavy, control of an endpoint tool or the low-impact but less effective cloud-based scanning of SiteLock.

Core security features

Malware scanning

⚖️ Verdict: Wordfence takes the lead with its signature-matching mechanism that effectively detects a majority of file-based malware, whereas SiteLock fails to flag any malware in our tests.

Wordfence’s malware scanner runs directly on your server. It compares your files against a massive database of malware signatures. This is great for spotting known threats, but it does mean it will struggle with new or custom code.

While Wordfence does a commendable job of keeping its database updated, it must be noted that this approach is not foolproof. It can only detect file-based malware, and it cannot detect newer, polymorphic, or zero-day malware. Signature matching has limits. Hackers hide their code to bypass simple checks. This makes detection difficult for any scanner relying solely on signatures for detection.

Additionally, Wordfence’s scanner is more effective on open-source or free plugins and themes, leaving out the majority of premium themes. Overall, Wordfence’s scanner is estimated to detect around 70-80% of malware, albeit with a fair amount of false positives.

A recurring complaint in developer forums is that aggressive signature matching often triggers false positives on custom themes or hardening plugins, requiring manual file whitelisting.

SiteLock 2.0 works differently, as it keeps the scanning off your server. Older versions of this tech missed deep site backdoors, however the new version links cloud intelligence with server-side access to find hidden threats.

However, in our tests, it failed to flag any malware on a heavily infected test site. This raises concerns about the effectiveness and reliability of its scanning mechanism. Furthermore, SiteLock only allows one on-demand scan per day, limiting its flexibility in proactive malware scanning.

Static signature matching is a reactive technique that identifies known patterns. Modern threats, however, often utilise memory-resident code or polymorphic scripts that mutate to evade these databases. Effective detection now requires behavioural analysis that monitors for anomalous runtime execution rather than just file contents.

💡 You want a malware scanner that actually catches malware. Most people assume all scanners work the same way. This is not true. MalCare’s scanner takes a different approach with AI-driven, non-intrusive scanning. It moves the complex computation off your server to its own infrastructure. This ensures you find hidden threats without sacrificing your site speed.

Malware removal

⚖️ Verdict: Wordfence wins again with its automated options and expert cleaning service, while SiteLock’s cleaning feature falls short due to its ineffective scanner.

When it comes to malware removal for WordPress, Wordfence provides two automated options on its dashboard: deleting all deletable files and repairing all repairable files. Both options were largely successful at removing file-based malware from our website.

However, when it comes to malware in databases and premium plugins, Wordfence’s scanner was unable to detect them, rendering the automatic repair options ineffective.

The alternative is to request their expert cleaning service, which includes malware removal, security audit, vulnerability assessment, security audits, and blacklist recovery. Though we can’t comment on the efficacy of Wordfence’s malware removal service since we didn’t try it, it offers a comprehensive solution for those needing expert assistance.

SiteLock uses an automated tool called SMART. This tool is designed to identify and remove malicious code automatically.

We couldn’t test SMART, because we had trouble with setting it up with FTP. Setting it up requires proper configuration, and we just couldn’t figure it out. We’re not alone though, as we have seen users report friction during this initial setup.

However, if the scanner fails to detect the malware, the removal tool cannot fix it.

💡 You need a solution that fixes your site when it gets hacked. Automated tools are great for speed. Expert support is often necessary for deep or complex infections. Otherwise your site is going to get reinfected.

Firewall

⚖️ Verdict: Wordfence’s firewall is more effective and reliable, while SiteLock’s basic plan lacks a firewall feature altogether.

Wordfence uses an endpoint firewall that this sits directly on your server, and inspects traffic at the application layer. This allows it to block malicious requests like SQL injection and cross-site scripting.

It starts with a learning mode that they recommend you keep on for a week. It will help understand your site traffic.

Wordfence’s firewall is known for its effectiveness in keeping out attacks. The firewall is designed to work out of the box and provides a strong layer of protection for your website.

However, it should be noted that while the free version of Wordfence’s firewall is still capable, the dashboard ranks it at only 35% effectiveness compared to the premium version. Load order issues and delayed updates for the free firewall can contribute to this lower efficacy. The premium version of Wordfence’s firewall receives real-time updates, providing a higher level of protection. This is vital for stopping new exploits quickly.

Neither version, Wordfence free or premium, has bot protection. Bot protection is essential for login and spam protection. So, we’ll deduct points for that.

Plus, Wordfence has been known to lock out actual users.

SiteLock takes a different path. It uses a cloud-based web application firewall, which filters traffic before it reaches your server. This approach saves your server resources, but also can prove to be too generic for WordPress-specific threats.

SiteLock’s basic plan does not include a firewall or bot protection. The firewall is only available for the Pro and Business plan.

Vulnerability detection

⚖️ Verdict: Wordfence successfully identifies vulnerabilities and flags them correctly, while SiteLock fails to detect any vulnerabilities on the test site.

Wordfence correctly flags outdated plugins as medium threats and identifies vulnerabilities as critical threats.

In the last few years, Wordfence has changed how their vulnerability detection works. They now use a platform called Wordfence Intelligence. This platform acts as a giant database of known security flaws. It tracks vulnerabilities across thousands of plugins and themes.

The database is powered by a bug bounty program, where Wordfence pays security researchers to find and report flaws. This program encourages experts to hunt for issues before hackers do. This creates a constant stream of new data. These findings are turned into actionable intelligence. Premium users get this data in real time. This allows the firewall to block attacks automatically as soon as a new flaw is known.

🤖 However, with the rise of AI-driven research, hackers are just as liable to find vulnerabilities quickly. In our data, we have found that vulnerabilities exist on an average of 14 months before being detected.

The window of risk between a vulnerability discovery and a public patch is critical. Automated intelligence databases significantly reduce this window by providing real-time firewall rule updates, neutralising threats before a site administrator can manually patch the software.

SiteLock 2.0 also offers vulnerability scanning. It focuses on identifying outdated software and misconfigurations. This helps businesses maintain a baseline of security without needing deep technical knowledge.

SiteLock’s vulnerability detection is bundled into the scanner feature, which is supposed to provide information about SQL injection and XSS vulnerabilities on the site. Unfortunately, in our testing, SiteLock’s scanner failed to detect any vulnerabilities, despite their presence on the site.

Site Health Score

The most notable feature in SiteLock 2.0 is the site health score. This metric consolidates multiple scans into a single, easy-to-understand number. It incorporates your malware status, vulnerability scans, SSL configuration, and other security settings. Instead of hunting through separate reports, you see a live assessment of your overall security posture. A prioritized security action queue further helps you focus on the most urgent tasks first. This removes the guesswork from maintenance. It allows you to protect your site with much less technical effort than before.

💡 You must know if your plugins or themes have security flaws. Hackers use these flaws to break into your site. Early vulnerability detection is the best way to prevent a full breach.

Login and monitoring

Login security

⚖️ Verdict: Wordfence’s brute force protection feature works perfectly, whereas SiteLock lacks this essential security feature.

Wordfence shines in this area, with brute force protection enabled by default. It effectively locks out users after too many incorrect login attempts, which can be configured from the dashboard. Wordfence provides a variety of customisable options for this feature, including setting lockout times and enforcing strong password usage.

While there is an option to whitelist IPs, its effectiveness is questionable due to the dynamic nature of device IPs.

SiteLock offers no features or protections against brute force login attempts. This glaring omission leaves sites using SiteLock potentially vulnerable to these common types of attacks.

Activity log

⚖️ Verdict: Both plugins could improve in this area, but Wordfence at least provides a raw log for developers, while SiteLock does not offer any activity log feature.

Surprisingly, Wordfence does not offer an activity log feature, a standard pillar of website security. While there is an option to enable debugging in the Diagnostics section, which increases the verbosity of the firewall logs, it is not equivalent to a comprehensive activity log. Wordfence does offer a raw log for Wordfence events in the Scan section, but it seems to be intended primarily for their developers in case of support.

SiteLock also does not offer an activity log feature. This absence further emphasizes the lack of comprehensive security features in SiteLock’s offering. Unlike Wordfence, SiteLock doesn’t even offer raw logs or the option to enable debugging.

Two-factor authentication

⚖️ Verdict: Wordfence’s two-factor authentication feature works smoothly, while SiteLock’s equivalent feature fails to send verification messages.

Wordfence offers a robust two-factor authentication feature that works out of the box. Previously a premium feature, it has now been added to the free plugin as well. This allows users to add an extra layer of security to their login process.

SiteLock also provides a two-factor authentication feature. However, during our testing, we encountered issues with both the text message and mobile verification options. The text message failed to send, and the mobile verification setup was unsuccessful. These issues raise concerns about the reliability and effectiveness of SiteLock’s two-factor authentication.

Performance and usability

Performance impact

⚖️ Verdict: SiteLock wins in this category as it has minimal impact on disk usage, while Wordfence is known to be resource-intensive.

Wordfence is known for being a resource-intensive plugin. During our tests, we observed significant increases in disk usage during scans and due to the firewall. These spikes in resource usage can impact your website’s load time, response time, and overall user experience.

Wordfence operates on your server, and it performs frequent scans and monitors traffic in real time. This consumes server CPU and memory.

Heavy scanning can increase your Time to First Byte. This often negatively affects your Interaction to Next Paint score. If the server is busy processing a security scan, it cannot respond quickly to user input. This makes your site feel laggy.

On the other hand, SiteLock’s scanner had a minimal impact on disk usage, suggesting that it is less resource-intensive than Wordfence.

SiteLock offloads its security tasks to the cloud. The firewall inspects traffic before it reaches your hosting server. This removes the processing burden from your local environment. It leaves your server free to handle page rendering and user interactions.

However, considering SiteLock’s lack of effectiveness in other areas, this might not necessarily be a positive.

High-resource usage from on-site scanners can degrade site speed metrics, specifically Interaction to Next Paint. When the server main thread is occupied by security processes, user input latency increases. Off-server cloud filtering effectively removes this performance tax from the local hosting environment.

💡 Google uses Core Web Vitals to measure how your site feels to real users. A heavy WordPress security plugin can unintentionally sabotage these scores, which it is vital to choose the right one.

Alerts

⚖️ Verdict: Both plugins could improve their alert systems, with Wordfence providing too many alerts and SiteLock’s alerts being unclear.

Wordfence’s alert system can be overwhelming. The high frequency of alerts can lead to a flood of notifications in your inbox. While it’s crucial to stay informed about your website’s security, too many alerts can lead to inaction due to the sheer volume.

SiteLock allows users to toggle notifications on and off for security issues from the dashboard. However, given the issues we encountered with SiteLock’s other features, it’s unclear what these alerts might entail.

Configuration and usability

⚖️ Verdict: Wordfence’s installation and configuration process is user-friendly and intuitive, while SiteLock’s process is convoluted and problematic.

Wordfence shines in this area, with a straightforward installation process and user-friendly configuration. Their dashboard includes walkthroughs for each major section, explaining important settings and features in simple language. Wordfence’s documentation is accessible directly from the tooltips on the dashboard, making it easy to understand each feature and how to use it on your website.

On the other hand, SiteLock’s installation process is far from seamless. The plugin is initially easy to install and activate, but finding it afterward can be a challenge as it goes into the Tools menu on wp-admin. Once located, the plugin requires you to connect to SiteLock’s site, which involves a convoluted process of purchasing a plan, expecting an email, and then returning to your site to configure the plugin. The configuration process includes a SMART setup that requires FTP access to your site, which proved problematic in our testing.

Additional features and limitations

Extra features

Wordfence includes a notifications section for site updates, identifying which plugins and themes need priority updates due to being identified as threats.

Additionally, Wordfence Central is an external dashboard for managing multiple sites on the same account, providing a high-level view of each site.

The Tools section includes a live traffic feature that helps you manage the users that browse or access your WordPress site.

The tools section also has a Whois lookup option, and a detailed Diagnostics section that provides granular information about the website. These additional features add value to Wordfence, enhancing its usability and functionality.

SiteLock includes some anti-spam features on its dashboard, but it’s unclear how to manage spam once it’s detected. SiteLock also offers full site backups, which could be a useful feature. However, the backups are stored on the site server itself, which limits their usefulness in the event of a server issue.

What’s missing

While Wordfence offers a solid range of features and performs well in many areas, it does have a few noticeable gaps. One significant missing feature is bot protection, which can help protect your site from automated attacks. Additionally, Wordfence does not include an activity log feature, which is a standard component of many security plugins. This feature helps site owners track all activities on their site, which can be crucial in identifying and responding to any suspicious behavior. Despite these omissions, Wordfence remains an above-average security plugin, standing out from many of its competitors.

Unfortunately, SiteLock falls short in many critical areas. Its malware scanner and its vulnerability detection is woefully inadequate. The cleaner feature can be risky to use, and the two-factor authentication feature doesn’t work as expected. Moreover, SiteLock lacks login protection, a crucial feature that helps prevent unauthorized access to your site. Essentially, SiteLock is missing many of the key features that are expected in a reliable and effective security plugin.

Pricing

The free version of Wordfence is quite robust, providing a decent range of features without any cost. The premium version, priced at $99 per year, offers additional features and more timely updates. Wordfence also offers Care and Response plans, which include malware cleanup services. The Response plan, priced at $950 per year per site, guarantees a 1-hour response time—crucial when dealing with a hacked site. However, if you choose the $99 plan and your site gets hacked, you will need to pay an additional $490 for malware cleanup.

SiteLock’s plans range from $14.99 to $34.99 per month per site. However, considering the lack of functionality and effectiveness in its basic plan, its value for money is questionable. Furthermore, the process of canceling a subscription with SiteLock can be tedious and time-consuming, which may be off-putting for potential customers. It’s worth noting that companies making it difficult to cancel subscriptions is often not a good sign of their customer service or user experience.

How to choose a security plugin

When it comes to choosing a security plugin for your WordPress site, certain features are essential to consider. These features include:

• Malware scanning: A good security plugin should be able to scan your website for any malicious code or files. It should have a robust scanning engine that can detect both known and unknown threats.
• Malware cleaning: If malware is detected, the plugin should be able to remove it effectively and restore your website to a clean state.
• Firewall: A firewall acts as a barrier between your website and potential threats. It monitors incoming and outgoing traffic, blocking any suspicious activity. A security plugin with a strong firewall can provide an extra layer of protection for your site.

In addition to these essential features, some good-to-have security features can further enhance your website’s security:

• Vulnerability detection: A plugin that can identify vulnerabilities in your website’s software and plugins can help you remediate them before they are exploited by hackers.
• Brute force login protection: This feature can protect your site from automated login attempts by limiting the number of login attempts allowed within a certain timeframe or by implementing CAPTCHA challenges.
• Activity log: An activity log can keep track of all actions taken on your website, allowing you to monitor and identify any suspicious or unauthorized activity. It provides valuable insights into who is accessing your site and what they are doing.
• Two-factor authentication: Enabling two-factor authentication adds an extra layer of security to your website login process. This requires users to provide an additional piece of information, such as a unique code sent to their mobile device, in addition to their username and password.
• Impact on server resources: When considering a security plugin, it’s also important to assess its potential impact on server resources. Some plugins, like Wordfence, have a reputation for being resource-intensive, which can slow down your website or cause other performance issues. A plugin must strike the right balance between security and performance.

Better alternative to both

While Wordfence and SiteLock are popular security plugins, they both have their limitations. If you’re looking for a more comprehensive, reliable, and user-friendly solution, we recommend considering MalCare.

MalCare is a powerful WordPress security plugin designed to offer superior protection for your website. It boasts anadvanced malware scanner that uses over 100 signals to detect even the most complex malware, instead of relying on signature-matching malware databases which depend on the continual vigilance of those maintaining it. Unlike Wordfence and SiteLock, MalCare’s scanner is designed to detect both file-based and database malware, ensuring comprehensive coverage.

In addition to its superior scanning capabilities, MalCare also offers a one-click automatic cleaner that can remove malware swiftly without needing any technical expertise. This feature sets MalCare apart from Wordfence and SiteLock, whose cleaning capabilities either come with caveats or could be more effective.

MalCare also features a robust firewall that blocks malicious traffic in real time, keeping your site safe from brute force and complex attacks. Unlike Wordfence, MalCare’s firewall does not slow down your site as it operates on MalCare’s servers, ensuring your website’s performance is never compromised.

Additionally, MalCare includes features such as login protection, and an activity log, covering areas where Wordfence and SiteLock fall short. It also offers white labeling and client reporting, ideal for agencies managing multiple client sites.

Lastly, MalCare’s pricing is straightforward and value for money. Starting at just $149 per year for a single site, you get access to all premium features including unlimited automatic malware removal, website hardening, and priority customer support.

Final thoughts

In the world of WordPress security, three essentials matter: scanning, malware removal, and a robust firewall. After extensive testing, Wordfence prevails as reliable thanks to its comprehensive approach. SiteLock, unfortunately, falls short in functionality, bringing its reliability into question. However, neither of them is as comprehensive as MalCare. MalCare offers the best malware scanner, malware removal, and firewall. It is a complete security solution at a competitive price.

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