Genuine responses, free of bot spam

A public survey is an open door, and automated bots will try to walk through it. A CAPTCHA closes that door to scripts while keeping it open for real participants. Build any questionnaire with the Mailpro survey creator when you create an online survey, switch on CAPTCHA, and every response you receive comes from a person who meant to send it.

Spam prevention

Block bots before they submit

CAPTCHA asks for a simple human-verification step that automated scripts cannot pass, stopping spam entries at the point of submission. Turn it on for any public survey, from a customer satisfaction survey to a wider market research survey, and keep junk out of your results so your reporting reflects real opinions.

Build a protected survey →
CAPTCHA blocking automated survey submissions
Data integrity

Keep your response data clean and trustworthy

By filtering out automated submissions, CAPTCHA protects the accuracy of the data you gather — vital for research, academic studies and customer feedback. Cleaner responses feed directly into your dynamic survey statistics, and you can export your survey responses knowing every entry came from a genuine participant.

See survey statistics →
Clean survey data protected by CAPTCHA in Mailpro
Defense in depth

One layer in a full security stack

CAPTCHA is a strong first line, and Mailpro lets you go further. Add password-protected surveys to limit participation to invited people, and rely on built-in SSL/TLS encryption to keep every answer confidential in transit. Combine these controls to match the sensitivity of what you collect.

Explore survey security →
Layered Mailpro survey security controls
QUESTIONS

Frequently asked questions

What does CAPTCHA do on a survey?
CAPTCHA adds a quick human-verification step before a survey can be submitted. It blocks automated bots and scripts, so your results come from genuine participants instead of spam entries.
How do I add CAPTCHA to a Mailpro survey?
Enable CAPTCHA while you create an online survey. No code is required — Mailpro adds the verification step automatically and handles the check for you.
Does CAPTCHA make surveys harder to complete?
No. The Mailpro CAPTCHA is designed to be fast and user-friendly, so legitimate respondents can finish the survey without friction while automated submissions are stopped. It pairs well with clear questions and good survey participation practices.
Can I combine CAPTCHA with other survey security controls?
Yes. CAPTCHA works alongside password protection and SSL/TLS encryption, and every response is stored on Mailpro Swiss-hosted, GDPR-native infrastructure.

Protect your surveys from spam today

Create your free Mailpro account and add CAPTCHA to your online surveys in minutes — Swiss-hosted, GDPR-native, no credit card required.

Start free See pricing

All the features

Create your Newsletter
+500 Newsletter Templates
Contact
Management
Email Marketing Campaign
Email
Automation
Campaign Statistics & Reporting
SMS
Campaigns
Deliverability & Routing
SMTP
Relay Server
Advanced Features & Personalization
Email Marketing with AI