Alternatives

Products that do what Form Defender does

Defend your forms from spam

1
FormSanitizer▲160
Stop spammy form submissions with custom filters.
2025
2
Bouncer Shield▲85
Real-time form protection against bad emails
2024
3
SpamShield▲3
Build Forms That Catch Spam Before It Hits Your Inbox
Feb 2026 · getspamshield.com
4
You've Got Spam▲309
A new tool that lets you spam back the spammer
2020
5
Google Invisible reCAPTCHA▲427
Protects your website from spam and abuse
2017
6
Shieldy▲126
A zero-config Telegram bot that fights spam in chats
2018
7
MyHumans: Spam Call Blocker▲69
Stop 100% of spam calls
2019
8
Block Party▲446
Bye-bye, Twitter trolls 👋
2021
9
MUTE▲3
Block contact form spam. No CAPTCHA, one line of code.
Apr 2026 · mute-it.com
10
SpamSieve▲71
Add powerful spam filtering to your Mac’s e-mail client
2018
11
RoboKiller▲85
The app that stops spam calls forever
2019
12
Password-protected forms by JotForm▲116
Say goodbye to unwanted form submissions
2019
13
Trueguard▲368
Stop fake user signups
2025
14
NP FormShield▲1
Stop WordPress Form Spam Before It Reaches Your Inbox
4d ago · needsplugin.com
15
RoboStopper▲70
Block spam calls or get paid for them wasting your time
2019
16
FormGuard▲3
AI Form Backend for Builders
Mar 2026 · formguard.strivio.world
17
SMS Junk Filter for iOS▲102
Block unwanted SMS spam text messages
2017
18
Warmup Inbox▲204
Free email spam checker & inbox placement tester
2023
19
ZENCAPTCHA▲115
Privacy-first bot & spam defense, GDPR compliant CAPTCHA
2023
20
Clearbit's Risk API▲189
Identify spam signups & bad actors
2017
21
Pepper▲114
Block robocalls before they ring your phone ❌🤖
2019
22
SMS Shield▲112
Machine Learning-based SMS spam filter for iOS 11
2017
23
Leads Ward▲108
Stop bad leads with AI-powered form filtering for businesses
2025
24PA
Pesky Adblock – Blocks site access to visitors without an adblocker▲119
2018 · gitgud.io

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