bwt
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All-In-One Security (AIOS)

by TeamUpdraft

The most-installed free WordPress firewall and hardening plugin. Genuinely capable free tier from the UpdraftPlus team.

Visit All-In-One Security (AIOS) → Docs WP.org
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Last release
June 5, 2026 v5.4.9
WP.org rating
4.7
1.7K reviews · 1M+ installs
Security plugin Free, Pro from $70 GPL Since 2013 Tested up to WP 7.0.1 Requires WP 5.0+ PHP 5.6+
// editorial verdict

All-In-One Security (AIOS) is the most-installed free security plugin in the WordPress directory, and its free tier is unusually complete: a web application firewall with configurable rulesets, login lockdown and brute-force protection, two-factor authentication, login-page hardening, file-change detection, spam prevention, and a security-strength meter that scores your setup. Premium layers on advanced firewall rules, malware scanning, country blocking, and priority support. Made by TeamUpdraft (David Anderson's shop, also behind UpdraftPlus), it is the plugin to reach for when you want real hardening without paying — and a sensible upgrade path if you later do.

Pros

  • Exceptionally capable free tier — firewall, 2FA, brute-force protection, and hardening at no cost
  • The security-strength meter makes hardening approachable for non-specialists
  • Highest user rating of the major security plugins on WordPress.org (well over a thousand ratings)
  • Backed by an established UK vendor with a long track record (UpdraftPlus)

Cons

  • Malware scanning and country blocking are Premium-only
  • Some advanced firewall settings can lock you out if applied without care
  • Plugin-level firewall runs after WordPress loads, so it is less effective than an edge WAF against high-volume attacks
  • Premium is newer and less established than the free plugin's long history
When to pick All-In-One Security (AIOS)

Pick AIOS when you want the strongest free WordPress security baseline available — firewall, 2FA, and hardening — without a subscription. It is the natural default for a self-managed small-to-medium site, and the guided strength meter makes it the friendliest to configure.

When to avoid All-In-One Security (AIOS)

Avoid if you need managed, edge-level protection with a cleanup guarantee (that is Sucuri), or if you are already fully covered by a CDN firewall plus a vulnerability-monitoring service and do not want another plugin.

// faq

Frequently asked questions

Is All-In-One Security really free?
Yes, and its free tier is one of the most complete in the category: a configurable web application firewall, brute-force and login protection, two-factor authentication, login hardening, file-change detection, and a security-strength meter — all at no cost. Premium adds malware scanning, advanced firewall rules, and country blocking.
Is AIOS better than Wordfence?
For a free firewall and hardening setup, AIOS is excellent and posts a higher WordPress.org user rating. Wordfence's free tier adds a malware scanner and its premium real-time threat-intelligence feed, which AIOS gates behind Premium. If you want free malware scanning built in, Wordfence has the edge; if you want the most guided free hardening, AIOS does.
Who makes All-In-One Security?
TeamUpdraft (Updraft WP Software Ltd), the UK-based team founded by David Anderson that also makes UpdraftPlus, the most-installed WordPress backup plugin. The security plugin was previously known as All In One WP Security & Firewall.
Will AIOS slow down my site?
For most sites the overhead is small — the firewall and login checks run on requests but are lightweight. As with any plugin-level firewall, the protection happens after WordPress loads, so it trades a little runtime cost for defense that works on any host. Applying only the hardening rules you understand keeps both risk and overhead low.
// activity & context
// often compared with Full comparison
Product CategoryPriceLighthouse
All-In-One Security (AIOS) this SecurityFree, Pro from $70—
Wordfence SecurityFree, Pro from $14988
Sucuri Security SecurityFree, Pro from $199—
// similar plugins
// methodology

Performance testing

Lighthouse scoring methodology lands soon. Until then, treat the score as provisional.

Vulnerability tracking

Open and recently closed CVE counts pulled from Patchstack and Wordfence Intelligence on every build. Last disclosure date reflects the most recent public CVE for this plugin, not necessarily the most recent vendor patch.