Forum Fortress
Forum spam protection

Stop forum spam before it reaches your community.

Forum Fortress blocks spam signups, posts, profiles, and signatures without forcing real users through CAPTCHA.

Install the plugin, turn it on, and keep an eye on every block or allow decision in one place.

Download, install, and protection starts instantly. No signup required.

No credit card or registration required. Enjoy 30 days of Pro, then use our free plan or choose to upgrade.

No CAPTCHA friction
Fast checks
Simple plugin setup
One dashboard

Live network stats

Network-wide totals from the live Forum Fortress network.

Spam attempts blocked
5,542
Forum checks processed
8,277
Spam signals indexed
24,978,778
API calls handled
1,365,746
Downloads

Download the anti-spam plugin for your forum software

Pick your forum platform, install the plugin, and start checking signups, posts, profiles, and signatures.

XenForo anti-spam add-on

Available now · v1.6.2

  1. Download the Forum Fortress XenForo add-on below.
  2. In XenForo Admin, go to Add-ons → Install/upgrade from archive.
  3. Upload the ZIP and install when prompted.
  4. Open Forum Fortress options and enter your forum's public URL.
  5. Run Tools → Forum Fortress → Connection test to confirm outbound access, then optionally connect the forum in the customer portal.

Spam wave hitting your forum today?

Install the plugin and start blocking risky signups, posts, profiles, and signatures straight away. No credit card required. New sites get a 30-day Pro trial. After 30 days, continue on the forever-free plan or choose an upgrade.

No account required to download
No credit card required
30-day Pro trial for new forums
Start blocking spam quickly

Built for forums, not generic website forms.

Built from the ground up specifically for forums, by real forum admins. We know how spambots and malicious humans behave, so we know how to stop them.

Forum-aware signalsChecks signups, posts, profiles, signatures, and repeat behaviour.
No more CAPTCHAsReal members get through without extra hassle.
Shared abuse signalsSpots repeat spam patterns across protected communities.
Clear logsEach decision explained clearly in the logs.

Spam takes too much of your time. Make it history on your community.

Fake signups

Bogus registrations clog your user list.

First-post spam

Spam posts appear minutes after signup.

Profile spam

Links and promos hidden in profiles.

CAPTCHA complaints

Good users hate extra steps and abandon.

Moderator overload

Spam workload grows and important items slip.

Lost sign-ups

Real users give up before joining.

Superfast setup

Protection in three quick steps.

Designed to be easy to install, simple to run, and not change how your community looks or feels to your genuine members and guests.

1
Download pluginPick your platform and grab the plugin.
2
Install pluginInstall it the same way you install any other add-on or extension.
3
You're protectedChecks start running in the background right away.

Registration is optional. It unlocks upgrades and some Pro features.

Cloud performance

Fast checks, automatic failover.

Forum Fortress is designed to keep remote spam checks feeling lightweight by routing decisions through nearby capacity and falling back automatically if a node has trouble.

Low-latency decision network

Spam checks are handled in the cloud without getting in the way of registrations, posting, profile edits, or signatures.

Automatic capacity near your server

If we detect poor performance or high latency from our system to yours, we will automatically spin up a new node that is nearer to your site's server to help keep things running smoothly and invisibly for your users.

Backup connection if a node has issues

If one of our nodes has an issue or is down for maintenance, our plugin is designed to connect to a backup system automatically to ensure no interruptions to your protection.

Customer portal

One central overview of your spam protection.

See what Forum Fortress allowed, blocked, or flagged across your forums. Search activity and spot patterns fast.

Quick feedback and support. Feed back incorrect decisions to the Forum Fortress team with one click.

Help when you need it. Get quick access to our support team to help you get set up and running.

Useful when it matters. Search past activity, spot patterns, and confirm each forum is protected.

  • Registration, post, profile, contact form and signature checksSee the main places spam tries to enter a forum and monitor what is being stopped and allowed.
  • Searchable decision historyLook back at earlier checks or investigate something that feels off.
  • Multi-forum management (Pro)Manage spam protection for multiple forums, even across different forum software, from the same portal.
  • Advanced reporting and graphs (Pro)Search and filter activity, spot trends, and see moderation workload clearly.
Launch portal demoSample data only · opens in a new tab

Run more than one community?

Manage more than one forum from the same Forum Fortress portal.

Run one forum or several. You still get one place to see what was stopped and what is protected.

Our Pro plan unlocks Multimod functionality. Deal with reported posts and content in one queue for all of your communities.

How Forum Fortress stops forum spam

1Install the plugin
2Check risky activity
3Review decisions
Built for real forums.

Checks run on signups, posts, profiles, and signatures, then show up in the portal.

Forum spam protection FAQ

Can I start for free?

Our always-free package has been designed to give ongoing protection to small and medium communities. If you find you are out of allowance and in the middle of a spam wave, it is one click to enable attack mode and keep protection running when you need it most.

For larger sites, business users, multiple forums, or if you need more detailed reporting, our Core and Pro packages unlock more features and dedicated support.

No credit card is required to use our free package, and you will start with a 30-day trial of the Pro features too.

Is Forum Fortress just another blocklist?

No. Forum Fortress uses multiple signals, including our honeypot forum network, past activity, and visitor metadata.

What about the privacy of my members?

Forum Fortress is designed to work with the minimum amount of personal data.

We one-way hash submitted details automatically within five days, giving you enough time to analyse the logs without holding any personal data for longer than necessary.

We capture no more data than is required to do the job, and only use data already being collected by your site's normal operations. More information can be viewed in our privacy policy.

Does Forum Fortress stop spam registrations?

Yes. Forum Fortress checks risky registrations before they become public members, helping block spam accounts before they post, add profile links, or create moderation work.

Do I need to add client-side JavaScript to my site?

No. Unlike some competing solutions, Forum Fortress works entirely in the background and does not change the appearance, behaviour, or code of your community site, ensuring no third-party code calls slow your members down.

Does Forum Fortress stop profile spam?

Yes. Even if a malicious person makes it past registration, Forum Fortress will monitor the links they post. Whether it is in a topic, thread, profile post, or signature, if the link is suspicious, Forum Fortress will in almost all cases catch it and act according to your settings.

Do I need to use a CAPTCHA?

No. Forum Fortress is designed to protect forums without the use of CAPTCHA challenges. Spam checks run in the background through the plugin and cloud decision engine, analysing user behaviour in a privacy-friendly way.

CAPTCHAs often have to play catch-up with the latest methods used by bad actors, and can present a genuine accessibility challenge to the real human users you want on your site.

Which forum platforms are supported?

Forum Fortress currently supports XenForo, phpBB, Invision Community, and SMF. We continue to improve these plugins and work on supporting more platforms. If your forum software is not covered, feel free to contact us and we can let you know our development plans for your platform.

Will Forum Fortress slow down my forum?

Forum Fortress is designed to make quick cloud decisions without getting in the way of normal forum use. If we detect poor performance or high latency from our system to yours, we will automatically spin up a new node that is nearer to your site's server to help keep things running smoothly and invisibly for your users.

If one of our nodes has an issue or is down for maintenance, our plugin is designed to connect to a backup system automatically to ensure no interruptions to your protection.

Simple pricing for communities of every size.

Start free. Upgrade to a simple annual plan when your forum needs higher limits, automatic blocking, multi-forum management or Pro-only reporting and graphs.

Free

$0/month
2,000 checks/month · 25 autoblocks/day
  • Daily autoblock limit: 25
  • Not included: Higher automation limits
  • Not included: Multi-forum workflow automation
  • Keeps spam off public pages
  • Allow/block decisions
  • Basic reasons and logs
  • Good for small communities

Pro

$40/year
100K checks/month · unlimited autoblocks
  • Daily autoblock limit: Unlimited
  • Automatic allow/block decisions
  • Multi-forum workflow automation
  • Advanced reports
  • Graphs (analytics trends)
  • Moderation workspace
  • Multi-forum management
  • Priority support
  • Up to 5 forums
Same protection engine on every plan. Paid tiers add automation, reporting and lower admin workload, not weaker detection.

Here to help.

Tell us how we can help with spam on your site.

Built with

Python
FastAPI
PostgreSQL
nginx
Debian
Vultr