Boost Klaviyo List Building with Claspo

A Pop-up Builder Packed with Advanced Features

Create custom pop-ups and forms

Use templates that adapt to your branding

Target the right segments

Enrich Klaviyo profiles

Based on
50+ reviews once

Every Tool You Need to Boost Your List-building Campaigns

Claspo is a free pop-up builder that helps boost sales and grow email lists

top image

What's Inside Claspo

User-friendly drag-and-drop editor

700+ ready-to-use templates

Extensive popup layout options

Advanced possibilities to setup display rules

Dashboard with User Roles and Permissions

Built-in analytics and A/B testing

Simple script installation

Limitless integration possibilities

Multilingual localization

24/7 Customer support

Order widget designs and get help integrating them

Simple Integration via API

top image

Integrating Claspo with Klaviyo takes no longer than 5 minutes

Send leads and user data to any CRM, CDP, email marketing, or analytics service

Take advantage of a step-by-step Klaviyo integration walkthrough

Need help? No worries, our team is ready to guide you through the integration process 24/7

Stay Ahead of the Competition with Advanced Features

We took the pop-up builder to a new level and sprinkled some extra goodies on Claspo for you to enjoy

Streamline Conversions Like a Pro

Annoyance Safeguard

Set up the desired time intervals between displaying widgets and show your offers one by one.

Overlap Protection

Want to show multiple widgets within a single session? Claspo makes sure they don't overlap.

Get The Quality Data

Email Domain Spellchecker

Increase the quality of the user data you gather with no more misprints in domain names.

Business domains

Want to collect only business emails? We got you covered.

Be Flexible

Adaptive Localization

Running multi-localized websites? Claspo displays localized pop-ups automatically based on visitor language preferences.

Validate and Test

Extend Analytics Capabilities

Discover the impact of your popups on user behavior. Use Claspo event triggers to transfer user activity data to your Google Analytics account or any other service via GTM.

Turn Traffic into Customers With Claspo

What Our Clients Say About Us

Serhii Doroshenko

Retention Team Lead MAUDAU

We seamlessly plugged in Claspo to our site without developers involved. Now, our marketing team effortlessly runs A/B tests and kicks off promos at lightning speed. The results? Solid revenue boosts and promotions that hit the mark. Big thanks to Claspo for elevating our business game!

Nikita Gontar

Retention Manager, Devart

Incredible easy-to-use software with a bundle of features that can help you to obtain more leads. Awesome customer support. Highly recommended!


Marketing Specialist, DeepStateMap

Our conversion rate increased by 3.9 times thanks to the SPA supported by Сlaspo. The script works more correctly, is more stable, and loads better. We really enjoy multilanguage widgets and geotargeting!

Jordan S.

Product Marketing Lead

An easy-to-use and customizable solution. No cons were found during the work, overall clear and useful functionality.

Viktoriia Tsalpinska

Email marketing specialist,

We decided to introduce a floating information widget. It is not intrusive, but it had to appear with each new session. Claspo was the easiest way to do this. The platform is easy to understand, you can figure everything out in half an hour.

Kate K.

Partner Relations Manager

The A/B testing feature is a huge plus! Overall: With Claspo's wide range of customizable widgets, you can create all kinds of interactive elements that help your sites stand out and engage visitors. The A/B testing allows you to optimize each element and determine which widget performs better

Tony Fiston


It looks like Claspo makes creating and launching website widgets easy fot any coding skills. I am excited to try the customization options and KPI-driven analytics to optimize my site's conversion.

Product Hunt

We use cookies to ensure that our website functions correctly, to personalize advertisements and other content, to provide social media features, and to analyze network traffic. We also share information about your website use with our social media, advertising, and analytics partners. By staying on the website, you accept this.