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Aastha Shaw / February 23, 2024 March 13, 2025

How To Stop Invalid & Spam Submissions on HubSpot Forms


Preventing spam submissions on HubSpot forms

If you are looking for a simple solution to prevent spam submissions on your HubSpot Forms, this guide is just for you!

HubSpot, a leading marketing and sales platform, boasts millions of active users, and its easy-to-use forms are a cornerstone of its popularity. But, do you ever feel like your HubSpot forms are being used by robots instead of real people?

You're not alone!

Fake leads and "spam bots" are a major headache for marketers. They waste your time, clutter your data, and make it hard to understand your audience.

Preventing spam submissions on HubSpot forms

So, today we will delve into the common challenges faced due to spam submissions and share the easiest yet most effective way to STOP SPAM BOTS from ruining your database.

Let’s get started…

Form Spam vs HubSpot Forms


HubSpot forms are an indispensable tool for capturing leads on your website, landing pages, or in your email campaigns.

While the convenience that HubSpot offers attracts businesses of all sizes, it also attracts unwanted visitors - spambots & abusers. These submissions often come in a predictable pattern, with nonsensical data, disposable and gibberish emails, or stolen information.

This leads to a frustrating influx of fake leads that clog your database and waste your time.

The Challenges of Spam Submissions: A Growing Pain for Marketers


Let's take a closer look at how spam bots and fake submissions pose significant problems for marketers.

  • Wasted Time & Resources: Sorting through and discarding fake leads takes away valuable time that could be spent on nurturing genuine prospects.
  • Data Inaccuracy: Polluted data affects your analytics and reporting, making it difficult to understand your audience and track campaign performance accurately.
  • Marketing Fatigue: Continuously receiving irrelevant submissions can lead to frustration and discouragement, impacting your overall marketing efforts.
  • Compliance Risks: Depending on your industry and location, accepting fake leads might violate data privacy regulations, exposing you to potential legal issues.
So, how do we fix this?

How HubSpot Stops Spam Submissions


HubSpot offers some default measures to stop spam activities on the form. Let’s have a look at those…

1. Using CAPTCHA To Stop Spam Bots


HubSpot offers some basic protection against spam bots by allowing you to enable CAPTCHA on your forms. How it Works:

  1. In your HubSpot account, navigate to Marketing > Lead Capture > Forms.
  2. Hover over a form and click Edit.
  3. In the left pane, under the Other Form Elements section, click to toggle the Captcha (SPAM Prevention) switch on.
  4. In the top right, click Update or Publish. After enabling CAPTCHA, Google's invisible reCAPTCHA will appear on your form when you add the form to a page.

Preventing spam submissions on HubSpot forms

If Google determines that a visitor is suspicious, they must solve a CAPTCHA challenge before they can submit the form.

While this can deter simple bots, it also adds an extra hurdle for human users, potentially decreasing your conversion rate. Additionally, sophisticated bots have evolved to bypass CAPTCHA, rendering it an ineffective long-term solution.

2. Blocking Disposable Domains


System abusers often use temporary or disposable emails to pass through forms which leads to invalid and spammy leads in your system.

To stop such signups, HubSpot has a list of disposable domains that are blocked by default. However, the submissions are not verified in real-time and can be inaccurate, and many other such domains that are not in the default list can be used to sign up by the spammers.

Hence, you can not completely rely on the default validation and blocks to completely get rid of spam submissions.

Immediate Solution To Stop Spam Submissions On Your HubSpot Forms


The ideal solution to proactively prevent spam submissions on HubSpot forms is to verify every submission in real time before they enter your system.

Here's where Clearout shines.✨

Clearout integrates seamlessly with HubSpot forms, validating email addresses in real time as they are submitted.

Preventing spam submissions on HubSpot forms

Clearout goes beyond basic validation. Its sophisticated algorithms analyze submission patterns, identifying suspicious activity and blocking invalid emails instantly based on various checks, such as verifying syntax, domain existence, free domains, disposable domains, spam traps, mailbox activity, and more.

This means you are not only stopping spam bots but any abuser or unwanted/fake lead trying to enter your system.

P.S.- You don’t even need to rely on a developer to do the integration. 😎
Clearout makes it super easy to integrate and offers 24*7 support to help you fix any issues.

👉 Here’s how you can integrate Clearout with your Hubspot forms.

Skip the video below to 1:15 to start directly with the integration part.


Why Use Clearout's HubSpot Email Validation Integration?


By eliminating spam submissions, Clearout ensures your database is filled with high-quality, genuine leads. But that’s not all, the benefits extend beyond just blocking spam:

  • Increased ROI: By focusing on real leads, you can improve conversion rates and maximize the return on your marketing investment.
  • Enhanced Reporting & Analytics: Along with clean data, you get detailed reports on email validation results, allowing you to track the effectiveness of your spam prevention efforts and optimize your lead generation strategy accordingly.
  • Reduced Compliance Risks: Clearout’s accurate results give you the confidence that your leads are genuine and mitigate compliance risks associated with handling personal data.
  • Improved User Experience: Removing the CAPTCHA hurdle creates a smoother and more positive experience for legitimate users submitting your forms.
  • Incomplete Form Submissions: Clearout can flag incomplete or partial submissions, so you can follow up with users and improve conversion rates.
  • Data Duplication: Duplicate submissions can clutter your database and skew your reporting metrics. Clearout helps identify and eliminate duplicate entries, ensuring clean and accurate data.
  • Form Validation Errors: Clearout's real-time validation prompts users to correct errors and typos on the spot, reducing form abandonment rates.
  • Scalability and Flexibility: Whether you're a small business or an enterprise-level organization, Clearout offers a solution that scales with your needs. With flexible pricing plans and seamless integration options, you can trust Clearout to adapt to your growing business requirements.

Empowering Marketers To Fight Spam with Clearout


While enabling CAPTCHA can offer some basic protection, it's not enough to comprehensively tackle the growing problem of spam submissions in HubSpot forms.

Whereas, Clearout provides a complete solution, seamlessly filtering out bots and fake leads without using captcha, ensuring a seamless user experience. It helps you reclaim your time, improve data quality, and empower your marketing efforts with the confidence of knowing you're reaching real, valuable prospects.

So what are you waiting for? Join the fight against spam and unlock the full potential of your HubSpot forms with Clearout!

Try Clearout + HubSpot Integration Now


Get Started

Frequently Asked Questions


Can you block specific email addresses in HubSpot forms?
Yes, you can block specific email addresses (like free emails) or domains in HubSpot forms. HubSpot allows you to create a blocklist of email addresses or domains that you want to prevent from submitting forms. However, using Clearout email validation along with HubSpot is the best solution as you can even block disposable and invalid email addresses.
How do I prevent spam submissions on HubSpot forms?
To prevent spam submissions on HubSpot forms, you can enable CAPTCHA, block disposable domains, and use real-time email validation services like Clearout. Clearout integrates seamlessly with HubSpot to validate email addresses as they are submitted, ensuring that only genuine leads enter your system.
Does HubSpot validate emails in real-time during the form-fill?
HubSpot does not validate emails in real-time by default during the form-fill. However, you can enhance this functionality by integrating a real-time email validation service like Clearout. Clearout checks email addresses as they are submitted, ensuring only valid and genuine leads are captured.
What to do if HubSpot reCAPTCHA is not stopping spam?
If HubSpot reCAPTCHA is not effectively stopping spam, it could be due to the increasing sophistication of bots that can bypass basic CAPTCHA challenges. While reCAPTCHA adds a layer of protection, it's not foolproof. To enhance spam prevention, use a real-time email validation service like Clearout as it can detect and block spam submissions when an email is entered into your HubSpot form.
How to filter bots in HubSpot forms?
To filter bots in HubSpot forms, you can:
Enable CAPTCHA: This adds a challenge for form submissions, deterring basic bots.
Use Real-Time Email Validation: Integrate Clearout to validate email addresses instantly and block suspicious submissions.
Monitor Submission Patterns: Look for patterns that indicate bot activity, such as repeated submissions from the same IP address or form submissions with nonsensical data.
Block Disposable Domains: Ensure HubSpot's default blocklist is active and consider using Clearout to block new disposable domains as well.
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