Forum Fortress

Anti-spam built for forum admins
Forum spam protection

Make it easier for humans, harder for spammers.

Protect your forum from bots, human spammers and AI-generated junk without CAPTCHAs, moderation headaches or lost sign-ups.

Install Free Plugin See How It Works

Available now for XenForo, phpBB, and Invision Community. Discourse is next.

Free during beta. Install in minutes.

Choose your forum software

Install on the platform you run today.

Pick your platform below and grab the latest release in one click.

XenForo

Stable

Production-ready plugin for XenForo communities.

Current release: 1.4.12
Download for XenForo

Invision Community

Beta

Beta plugin for Invision communities.

Current release: 1.0.0-beta11
Download for Invision

phpBB

Alpha

Alpha plugin for phpBB communities.

Current release: 1.0.0-alpha12
Download for phpBB

Discourse

Coming soon

Discourse plugin currently under development.

Status: In progress (next)
Request early access

Need another platform? Tell us what you run and we will prioritise it.

Registrations Checked

921

Cumulative registration and activity checks across protected forums.

Spam Attempts Blocked

578

Blocked before junk posts reached live communities.

Detection Signals Processed

1,522

Checks, block decisions, and challenge decisions processed by the engine.

Detection Signals Indexed

264,892

Signals continuously maintained in the detection engine.

Live threat pattern

Spam source locations

Recent blocked activity by country, updated from live detection telemetry.

Why admins install

Still dealing with this?

Forum Fortress handles it automatically.

Built for forums

Built for forums. Not generic websites.

Generic website spam tools

  • Built for contact forms
  • Poor forum context
  • Frustrate genuine users
  • Weak campaign detection

Forum Fortress

  • Built for registrations, posts and profiles
  • Understands forum behaviour
  • Low friction by default
  • Tuned for real communities
  • Built by forum operators for forum operators
Fast install

Under attack right now?

Install now and start blocking spam in minutes.

Get XenForo Plugin Get phpBB Plugin Get Invision Plugin

Need another platform? Discourse is under active development.

How it works

Simple protection flow

User registers or posts

Normal forum behaviour starts the check.

Forum Fortress checks signals instantly

Network, behaviour and identity signals are evaluated in milliseconds.

Allow / Queue / Block automatically

Protection runs continuously without slowing your members down.

Genuine users pass through smoothly.

Pricing

All plans use the same protection engine - every community that joins makes it smarter.

Free users get full protection. Paid plans save admin time with more automation, multi-forum tools and priority support.

Free during beta. Install in minutes.

Free

$0

Our core protection, free forever

Free keeps spam off public pages and gives smaller communities a reliable starting point without watering down protection.

  • ✓Stops spam from reaching public pages
  • ✓Suspicious content is held for review
  • ~Manual approval for flagged posts
  • ✓Basic reasons for flagged content
  • ✓Good for small forums

Good for small forums; manual approval needed for flagged posts.

Core

Recommended

$5/month

No moderation required

Core is designed for forum admins who don’t want to moderate spam at all.

  • ✓Everything in Free
  • ✓Unlimited automatic blocking
  • ✓Suspicious content is rejected automatically instead of going to a queue
  • ✓Advanced spam intelligence and attack mode
  • ✓Supports up to 2 forums

Designed for admins who want spam rejected automatically.

Pro

$15/month

For multiple communities

Pro is built for companies or agencies managing several forum communities.

  • ✓Everything in Core
  • ✓Multi-forum management and unified moderation
  • ✓Bulk actions, filtering and centralised reporting
  • ✓Supports up to 5 forums
  • ✓Built for teams managing several communities

Ideal for companies or agencies managing multiple communities.

Free tier stays genuinely useful. Paid tiers are about less admin work, not better detection quality.

Free cleanup tool

Need to clean up old soft-deleted spam?

Run XenForo? If you have been manually fighting spam, there is a good chance your forum is full of old soft-deleted junk. Our Soft Delete Purge plugin helps clean that up. It is completely free, with no requirement to be a Forum Fortress user. But if you want to keep things clean long term, install both plugins.

XenForo Soft Delete Purge

Free utility addon focused on housekeeping. Use it alongside the main anti-spam plugin for cleaner moderation history.

Current release: 1.0.0

Download Free Cleanup Tool
After install

Install in minutes. Keep members moving.

Forum Fortress runs in the background with practical defaults. No captcha walls, no pointless friction, no daily cleanup ritual for your moderators.

Fast setup

Install the plugin, connect your site, and start filtering immediately.

Practical control

Automatic blocking by default, with review and reporting tools when you need them.

Direct support

Need help with a spam wave, migration or custom setup?

Need direct help? We reply quickly.

Send details in the form and we will respond with practical next steps.

Send a message