How Fillout powers higher-converting forms with Abstract's Email Validation
About Fillout
Fillout is a no-code form and app builder designed for SMBs and non-technical teams. With a generous pricing model and a focus on ease of use, Fillout helps companies build high-converting forms and full web applications without writing a single line of code. The platform processes hundreds of millions of form submissions every month.
The challenge
As Fillout scaled its customer base, the team recognized that form quality mattered as much as form volume. Customers building lead generation and conversion-focused forms were encountering a familiar problem: fake, invalid, or junk email addresses slipping through submissions, polluting CRMs, distorting analytics, and reducing the ROI of campaigns.
Fillout needed a reliable, easy-to-integrate way to validate email addresses in real time, directly within the form experience, without adding friction for legitimate users.
How they built it
Fillout integrated Abstract's Email Validation as a core component of its Conversion Kit, a premium add-on designed for customers who need their forms to perform at the highest level.
When a user submits a form with the email validation toggle enabled, Abstract's Email Validation checks the address in real time. If the email is invalid or doesn't exist, the user is immediately prompted to enter a valid address before the form will submit. The result: cleaner data, fewer junk submissions, and a better experience for everyone.
"The API was clear and the pricing structure made sense. We were able to ship quickly." — Anthony, Fillout
Fillout also uses Abstract's Email Validation on its own internal enterprise forms, filtering out spam submissions before they ever reach the team.
The results
A consistent driver of Conversion Kit upgrades. Email validation is regularly cited as a reason customers choose to upgrade to the Conversion Kit, making it a meaningful contributor to add-on adoption.
High and growing usage. Since integrating, Fillout processes thousands of email validation requests per day, with peak days exceeding 30,000+ validations, a clear signal of how actively customers rely on the feature.
Spam and junk prevention at 30,000+ validations per day. By blocking invalid email addresses at the point of submission, Fillout's customers can trust the data coming through their forms.
Fast integration, low overhead. The team was able to deploy the feature quickly, with minimal engineering effort, thanks to Abstract's straightforward documentation.
What's next
Fillout recently launched Zite, a no-code app and database builder that extends the platform into a full product-building suite. With Zite, non-technical teams can build secure, fully functional apps and databases with authentication and workflow logic built in from the start.
As Fillout's customer base and platform expand, the team is exploring deeper integrations across Abstract's products, from Phone Validation to IP Intelligence, to keep the data flowing through their forms and apps accurate, trustworthy, and spam-free.