AI · alternatives · 2026

24 alternatives to Form Defender

Defend your forms from spam

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1
FormSanitizer▲160
Stop spammy form submissions with custom filters.
2025 · formsanitizer.com · its alternatives →
2
Bouncer Shield▲85
Real-time form protection against bad emails
2024 · usebouncer.com · its alternatives →
3
You've Got Spam▲305
A new tool that lets you spam back the spammer
2020 · youvegotspam.mschfmag.com · its alternatives →
4
SpamShield▲3
Build Forms That Catch Spam Before It Hits Your Inbox
Feb 2026 · getspamshield.com · its alternatives →
5
Bot Butcher▲106
API for classifying contact form spam
2023 · botbutcher.com · its alternatives →
6
mosparo▲60
the modern spam protection
2023 · mosparo.io · its alternatives →
7
Google Invisible reCAPTCHA▲428
Protects your website from spam and abuse
2017 · cloud.google.com · its alternatives →
8
Shieldy▲126
A zero-config Telegram bot that fights spam in chats
2018 · t.me · its alternatives →
9
MyHumans: Spam Call Blocker▲69
Stop 100% of spam calls
2019 · its alternatives →
10
MUTE▲3
Block contact form spam. No CAPTCHA, one line of code.
Apr 2026 · mute-it.com · its alternatives →
11
Guard.dm▲98
Make the spammers pay, literally
2023 · its alternatives →
12
SpamSieve▲71
Add powerful spam filtering to your Mac’s e-mail client
2018 · c-command.com · its alternatives →
13
RoboKiller▲85
The app that stops spam calls forever
2019 · robokiller.com · its alternatives →
14
Password-protected forms by JotForm▲116
Say goodbye to unwanted form submissions
2019 · jotform.com · its alternatives →
15
Forget Spam Comment▲72
The fastest & GDPR compliant Anti-Spam plugin for WordPress
2021 · wordpress.org · its alternatives →
16
NP FormShield▲1
Stop WordPress Form Spam Before It Reaches Your Inbox
Sep 2026 · needsplugin.com · its alternatives →
17
RoboStopper▲70
Block spam calls or get paid for them wasting your time
2019 · robostopper.app · its alternatives →
18
Referrer Spam Blocker▲7
Automatically install filters to block referral spam
2016 · its alternatives →
19
FormGuard▲3
AI Form Backend for Builders
Mar 2026 · formguard.strivio.world · its alternatives →
20
SMS Junk Filter for iOS▲102
Block unwanted SMS spam text messages
2017 · apps.apple.com · its alternatives →
21
Anti Block Me▲74
Stop losing ad revenue
2022 · its alternatives →
22
ZENCAPTCHA▲115
Privacy-first bot & spam defense, GDPR compliant CAPTCHA
2023 · zencaptcha.com · its alternatives →
23
Anti-Spam Protection WordPress Plugin▲5
Enhanced Anti-Spam Protection WordPress Plugin
2024 · gorewada.gumroad.com · its alternatives →
24
Begone, Spammer▲69
Outwit spammers with AI-generated replies
2023 · begonespammer.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →