Formful – Contact Form Builder vs K: Contact Form Builder
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 9, 2026 for Formful, Nov 7, 2026 for K: Contact Form Builder.
The short answer
- On the Shopify App Store: Formful 4.6 from 105 reviews and K: Contact Form Builder 5.0 from 86 reviews.
- Only Formful lists a free plan.
- Formful lists 19 features K: Contact Form Builder’s listing doesn’t mention, including Applications, Auto-sync, Bookings.
Head to head
- United States
- United Kingdom
- Germany
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free, forever
- · 20 submissions/month
- · All basic functionality included
- · Autoresponder
- · File upload
- · ReCAPTCHA
- · Shopify Automations
Starter
- · 2 GB total storage & 20 MB file size
- · 200 submissions/month
- · All functions & unlimited forms
- · Export submissions (Excel/CSV)
Pro
- · 10 GB storage & 100 MB file upload size
- · Everything in Starter
- · Extensive Analytics
- · Google Drive
- · Google Sheets
- · Unlimited submissions
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCreate any form with the drag & drop builder or let the AI assistant build, edit and translate it in chat. Build multi-step forms with conditional logic: warranty claims, product registration, customer and B2B registration. Sync submissions to customer profiles with email, SMS and WhatsApp marketing consent, create B2B companies and fill metafields. Protect forms with captcha.
Effortlessly 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.
- Multilanguage - translate your form and emails to all languages of your shop.
- Drag & drop builder - build any form, without code.
- Automate - connect your form with Shopify customers and third party apps.
- Upload field - add an upload field to your form for images or files.
- 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.
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 |  Formful |  K: Contact Form Builder |
|---|---|---|
| Detected stores | 138 | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | 3 | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Apparel & Accessories, Home & Garden, Food, Beverages & Tobacco | Not published |
| Top store countries | United States, United Kingdom, Germany | Not published |
Reviews
| Measure | Formful | K: Contact Form Builder |
|---|---|---|
| App Store rating | 4.6 ★ | 5.0 ★(ahead) |
| App Store reviews | 105(ahead) | 86 |
| New reviews, 28 days | 1 | 8(ahead) |
| Reviewers a year or more in | Not enough data | 0% |
Pricing
| Measure | Formful | K: Contact Form Builder |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $4.99/month | No monthly plan listed |
| Longest free trial | Not listed | Not listed |
| Plans listed | 3 | Not published |
Listing
| Measure | Formful | K: Contact Form Builder |
|---|---|---|
| Shopify category rank | #8 | #3(ahead) |
| Shopify App Charts | #18 in Forms | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Jul 27, 2023 | Jul 10, 2024 |
| Languages | 1 | 1 |
| Developer | HerculesApps | Kaktus |
FAQ
Formful and K: Contact Form Builder: common questions
- Is Formful or K: Contact Form Builder cheaper?
- Only Formful lists a free plan. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- Which has better reviews, Formful or K: Contact Form Builder?
- On the Shopify App Store: Formful 4.6 from 105 reviews and K: Contact Form Builder 5.0 from 86 reviews.
- What features does each app list that the other doesn’t?
- Formful lists 19 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 9, 2026 for Formful, Nov 7, 2026 for K: Contact Form Builder; 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 9, 2026 for Formful, Nov 7, 2026 for K: Contact Form Builder. 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.