K: Contact Form Builder, our full review (reviews, installation, pricing)

K: Contact Form Builder, our full review (reviews, installation, pricing)

What is K: Contact Form Builder?

K: Contact Form Builder creates popup, page-embedded, signup, multi-step and floating bubble contact forms, with file upload support and integrations to Mailchimp, MailerLite and GetResponse. It shows a perfect 5.0/5 rating, but on only 52 reviews, making it one of the newer and less-tested apps in this batch. It's developed by Kaktus, based in Chisinau, Moldova, and launched in July 2024.

How does the app work on a Shopify store?

Merchants select fields, add file uploads, and choose from several form display styles (popup, embedded, floating bubble). The app connects directly to email marketing providers like Mailchimp, MailerLite and GetResponse, and includes an AI generation feature to help build forms faster. It covers 4 languages, including Spanish and Portuguese, but not French or German.

Why choose K: Contact Form Builder over another form builder?

Being completely free, with no paid tier visible on the listing, is a clear differentiator from most competitors in this list that gate advanced features behind a subscription. One review specifically highlights being able to set custom email recipients per contact form, a feature the reviewer notes wasn't available in Shopify's native form builder. With only 52 reviews and a launch just over a year old, there's a smaller track record than established players like Hulk or Powerful Form, worth weighing for a merchant prioritizing long-term reliability over cost.

What are the 3 main features of the app?

  1. Multiple form display styles: popup, embedded, signup, floating bubble.
  2. Custom email recipients per form, going beyond Shopify's native form options.
  3. AI-assisted form generation, alongside file upload support.

Pros and Cons

Pros
+Completely free to use
+Drag-and-drop form builder with file upload support
+AI-assisted form generation to save setup time
+Multiple form types: popup, embedded, multi-step, and floating bubble
+Integrates with Mailchimp, MailerLite, and GetResponse
Cons
Only 4 languages supported
No pricing tiers mentioned, so unclear if advanced features are gated behind a future paid plan
Limited integration ecosystem, mainly email marketing tools, no CRM or helpdesk apps mentioned

Works With

GetResponse
Mailchimp
MailerLite
Open AI

Languages

English
Spanish
Portuguese (Brazil)
Portuguese (Portugal)
About the author
Inside App

Inside App

Passionate about e-commerce for several years, I decided to create my own website to showcase the best Shopify apps and help e-commerce merchants on their entrepreneurial journey.

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