Boost Klaviyo List Building
with Claspo

Boost Klaviyo List Building
with Claspo

A Pop-up Builder Packed with Advanced Features

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

Get Started

Based on
50+ reviews once

Based on 50+ reviews once

Create high-converting popups in minutes by Claspo Popup Maker
Create high-converting popups in minutes by Claspo Popup Maker

Every Tool You Need to Boost Your List-building Campaigns

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

Claspo - HubSpot Pop-Ups and Forms
Claspo - HubSpot Pop-Ups and Forms
Claspo - HubSpot Pop-Ups and Forms

What's Inside Claspo

What's Inside Claspo

  • User-friendly drag-and-drop editor

    User-friendly drag-and-drop editor

  • 1000+ ready-to-use templates

    1000+ ready-to-use templates

  • Extensive popup layout options

    Extensive popup layout options

  • Advanced possibilities to setup display rules

    Advanced possibilities to setup display rules

  • Dashboard with User Roles and Permissions

    Dashboard with User Roles and Permissions

  • Built-in analytics and A/B testing

    Built-in analytics and A/B testing

  • Simple script installation

    Simple script installation

  • Limitless integration possibilities

    Limitless integration possibilities

  • Multilingual localization

    Multilingual localization

  • 24/7 Customer support

    24/7 Customer support

  • Order widget designs and get help integrating them

    Order widget designs and get help integrating them

Get Started

Simple Integration via API

Simple Integration via API

Claspo - Integrate Seamlessly via OAuth

  • 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

Get help with integration

Stay Ahead of the Competition with Advanced Features

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

Claspo - Streamline Conversions Like a Pro
Claspo - Streamline Conversions Like a Pro
Claspo - Streamline Conversions Like a Pro

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.

Claspo - Get The Quality Data
Claspo - Get The Quality Data
Claspo - Get The Quality Data
Claspo - Streamline Conversions Like a Pro
Claspo - Streamline Conversions Like a Pro
Claspo - Streamline Conversions Like a Pro

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.

Claspo - Validate and Test
Claspo - Validate and Test
Claspo - Validate and Test

What Our Clients Say About Us

What Our Clients Say About Us

Maruti Konduri

Maruti Konduri

Co-founder of Cracku

Seasonal countdown widgets delivered dramatic lift — taking Cracku’s campaigns from ~1.8% CTR to 7-8% in just a few days. Smart urgency, precise targeting, and festive relevance generated up to 4× higher CTR compared to their regular promos.

Maruti Konduri

Maruti Konduri

Co-founder of Cracku

Seasonal countdown widgets delivered dramatic lift — taking Cracku’s campaigns from ~1.8% CTR to 7-8% in just a few days. Smart urgency, precise targeting, and festive relevance generated up to 4× higher CTR compared to their regular promos.

Borys Skowron

Borys Skowron

Founder of WHOSE

We saw a huge improvement in sign-up rates — going from around 3-5% to as high as 50% with the gamified widgets.

Borys Skowron

Borys Skowron

Founder of WHOSE

We saw a huge improvement in sign-up rates — going from around 3-5% to as high as 50% with the gamified widgets.

Tony Fiston

Tony Fiston

Marketing

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

Product Hunt

Tony Fiston

Tony Fiston

Marketing

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

Product Hunt

Kate K.

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

Capterra

Capterra

Kate K.

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

Capterra

Capterra

Viktoriia Tsalpinska

Viktoriia Tsalpinska

Email Marketing Specialist, Grade.ua

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.

Capterra

Capterra

Viktoriia Tsalpinska

Viktoriia Tsalpinska

Email Marketing Specialist, Grade.ua

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.

Capterra

Capterra

Jordan S.

Jordan S.

Product Marketing Lead

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

Capterra

Capterra

Jordan S.

Jordan S.

Product Marketing Lead

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

Capterra

Capterra

Nikita Gontar

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!

Capterra

Capterra

Nikita Gontar

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!

Capterra

Capterra

Serhii Doroshenko

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!

Capterra

Capterra

Serhii Doroshenko

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!

Capterra

Capterra

Kateryna Tkachuk

Kateryna Tkachuk

Lead UI/UX Designer

I am most attracted to the design and clear navigation. The interface was immediately clear and I didn't have to spend time watching training videos. I was also able to choose the form and design it myself. This helps to speed up the process of working with the website.

G2

G2

Kateryna Tkachuk

Kateryna Tkachuk

Lead UI/UX Designer

I am most attracted to the design and clear navigation. The interface was immediately clear and I didn't have to spend time watching training videos. I was also able to choose the form and design it myself. This helps to speed up the process of working with the website.

G2

G2

Eugene Samoladas

Eugene Samoladas

Head Of Marketing

I don't waste my time learning how to use the service. Everything is built very intuitively. Easy to create launch, and update. Quick response from the team and component enrichment compared to other companies.

G2

G2

Eugene Samoladas

Eugene Samoladas

Head Of Marketing

I don't waste my time learning how to use the service. Everything is built very intuitively. Easy to create launch, and update. Quick response from the team and component enrichment compared to other companies.

G2

G2

Turn Traffic into Customers With Claspo

Turn Traffic into Customers With Claspo

Turn Traffic into Customers With Claspo

Get Started