K: Contact Form Builder vs UpForm Contact Form & Popup
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 7, 2026 for K: Contact Form Builder, Nov 8, 2026 for UpForm Contact Form & Popup.
The short answer
- On the Shopify App Store: K: Contact Form Builder 5.0 from 86 reviews and UpForm Contact Form & Popup 4.6 from 11 reviews.
- UpForm Contact Form & Popup lists 21 features K: Contact Form Builder’s listing doesn’t mention, including Applications, Auto-sync, Bookings.
Head to head
- United States
- Australia
- India
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureEffortlessly connect with your customers to generate more leads and product sales with Contact Form Builder. Easy to build Popup Contact Form, Page Embedded Forms, Signup Form, Multi Step Forms & Floating Bubble Forms. Select the fields, add contact form file upload, ensuring you gather all the information in register form or data collection form.
The next-generation contact form builder to create beautiful, professional forms and popups with zero coding. Build contact us form, registration, booking, quote, or multi-step forms using a smart drag-and-drop builder. Supports file uploads, conditional logic, and 45+ field types.
- Effortlessly create forms and collect data from your customers.
- Customize the app to suit your website style.
- Trigger your form anywhere.
- Lots of form templates to save your time.
- More than a form builder — create popups, floating forms, banners & bars.
- Build contact, survey, GDPR, feedback, wholesale & bulk order forms, etc.
- Design beautiful customer registration & login pages in minutes.
- Send notifications, auto-reply emails & sync with Mailchimp, Brevo, Zapier, etc.
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  K: Contact Form Builder |  UpForm Contact Form & Popup |
|---|---|---|
| Detected stores | Not published | 244 |
| Net store change, 28 days | 0 | +12 |
| Stores added, 28 days | Not enough data | 17 |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Apparel & Accessories, Health & Beauty, Home & Garden |
| Top store countries | Not published | United States, Australia, India |
Reviews
| Measure | K: Contact Form Builder | UpForm Contact Form & Popup |
|---|---|---|
| App Store rating | 5.0 ★(ahead) | 4.6 ★ |
| App Store reviews | 86(ahead) | 11 |
| New reviews, 28 days | 9 | Not enough data |
| Reviewers a year or more in | 0% | Not enough data |
Pricing
| Measure | K: Contact Form Builder | UpForm Contact Form & Popup |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | No monthly plan listed | No monthly plan listed |
| Longest free trial | Not listed | Not listed |
| Plans listed | Not published | Not published |
Listing
| Measure | K: Contact Form Builder | UpForm Contact Form & Popup |
|---|---|---|
| Shopify category rank | #3(ahead) | #10 |
| Shopify App Charts | #2 on Review surge in Forms | #16 in Forms |
| Built for Shopify | No | Yes |
| Launched | Jul 10, 2024 | Oct 20, 2025 |
| Languages | 1 | 19 |
| Developer | Kaktus | Fisoma |
FAQ
K: Contact Form Builder and UpForm Contact Form & Popup: common questions
- Which has better reviews, K: Contact Form Builder or UpForm Contact Form & Popup?
- On the Shopify App Store: K: Contact Form Builder 5.0 from 86 reviews and UpForm Contact Form & Popup 4.6 from 11 reviews.
- What features does each app list that the other doesn’t?
- UpForm Contact Form & Popup lists 21 the others don’t mention, such as Applications, Auto-sync, Bookings, CAPTCHA. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 7, 2026 for K: Contact Form Builder, Nov 8, 2026 for UpForm Contact Form & Popup; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 7, 2026 for K: Contact Form Builder, Nov 8, 2026 for UpForm Contact Form & Popup. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.