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Formfilled.io VS KnowCSS

Compare Formfilled.io VS KnowCSS and see what are their differences

VisualVisitor
Consent-Based Identification of the Person Visiting Your Website Including First Name, Last Name, Email & 37 Other Data Points. Identify and Influence Your Engaged Website Visitors into Sales-Ready Leads โ€“ Before You Commit a Single Working Hour. featured
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Contents:
  1. ยป Base Details
  2. ยป Reviews
  3. ยป Alternatives

Formfilled.io logo Formfilled.io

Formfilled makes it easy to capture key attribution details of any website form submission, giving marketers confidence and clarity about where leads, opportunities and revenue are coming from.

KnowCSS logo KnowCSS

The NoCSS Engine. Never create a css file again.
  • Formfilled.io Field Mapping Settings in Formfilled
    Field Mapping Settings in Formfilled //
    2026-08-06

Formfilled empowers marketing teams with the ability to enrich every form submission with key attribution details like UTMs and URL history. This data can be easily routed into CRMs and your existing tech stack, giving you a clear vision of ROI on marketing channels, campaigns and website content. The tool tracks both first-touch and last-touch attribution and enriches form submissions with these details via hidden fields.

Formfilled is quick and easy to set up. In our browser-based dashboard, you can choose which attributes youโ€™d like to track, select your website form platform or CRM provider, and define custom traffic channel groupings to categorize traffic to your liking. From there, you can easily implement your script via Google Tag Manager, HTML, or your website's fileservers. Formfilled is hosted on a first-party basis and there is no outside visibility into your lead or CRM data, ensuring your organizationโ€™s privacy and security.

Once Formfilled is configured, you'll be able to consistently send attribution data to your marketing automation platform, CRM,= and notification workflows to analyze where leads, opportunities and customers originated from.

  • KnowCSS Landing page
    Landing page //
    2023-07-09

Formfilled.io

Website
formfilled.io
Pricing URL
Official Formfilled.io Pricing
$ Details
freemium $1500.0 / Annually
Release Date
2025 December
Startup details
Country
United States
State
Michigan
City
Ann Arbor
Founder(s)
David Oltean
Employees
1 - 9
Edit details

KnowCSS

Website
knowcss.com
Pricing URL
-
$ Details
-
Release Date
-
Categories
#CSS #HTML #JavaScript
Edit details

Formfilled.io features and specs

No features have been listed yet.

KnowCSS features and specs

  • Interactive CSS Learning
    KnowCSS provides an interactive way to learn and practice CSS properties and concepts, making it easier for beginners to understand how CSS works through hands-on experimentation.
  • Quick Reference Tool
    The site serves as a handy quick-reference tool for CSS properties, allowing developers to quickly look up syntax, values, and usage examples without digging through lengthy documentation.
  • Visual Demonstrations
    KnowCSS offers visual demonstrations of CSS properties, helping users see the immediate effect of different CSS values, which accelerates understanding of styling concepts.
  • Free to Use
    The platform is freely accessible, making it a cost-effective resource for students, self-taught developers, and anyone looking to improve their CSS skills without financial commitment.
  • Clean and Simple Interface
    The website features a clean, straightforward interface that is easy to navigate, allowing users to focus on learning CSS without being distracted by cluttered design or excessive advertisements.

Possible disadvantages of KnowCSS

  • Limited Depth of Content
    KnowCSS may not cover advanced CSS topics in sufficient depth, which means experienced developers may find the resource too basic for their needs and would need to supplement with other resources.
  • Limited Community and Support
    Compared to larger platforms like MDN Web Docs or CSS-Tricks, KnowCSS has a smaller community, meaning fewer discussions, forums, or peer support for troubleshooting issues.
  • Narrow Scope
    The site focuses specifically on CSS, so users looking for a comprehensive web development learning platform covering HTML, JavaScript, and other technologies will need to use additional resources.
  • Less Frequently Updated
    Smaller niche tools like KnowCSS may not be updated as frequently as major documentation sites, potentially missing coverage of the latest CSS features and specifications.
  • Limited Real-World Project Examples
    The platform may lack complex, real-world project examples that demonstrate how CSS properties work together in practical scenarios, which can leave a gap between learning individual properties and applying them in production.

Analysis of Formfilled.io

Overall verdict

  • Formfilled.io appears to be a form automation/management tool, but without verified, up-to-date information on its current features, pricing, and user reviews, a definitive quality assessment cannot be made. Prospective users should evaluate it directly through a trial or demo.

Why this product is good

  • May offer form-filling automation that saves time on repetitive data entry tasks
  • Could integrate with other tools to streamline workflows
  • Might provide a simpler alternative to more complex form-building platforms
  • Potentially useful for specific niche use cases like automated form submission or data extraction

Recommended for

  • Businesses looking to automate repetitive form-filling tasks
  • Users seeking a lightweight alternative to complex form platforms
  • Teams needing to test the tool's specific feature set before committing to larger competitors
  • Individuals who should verify current reviews, pricing, and feature parity before adoption

Analysis of KnowCSS

Overall verdict

  • KnowCSS is a lightweight, no-frills CSS framework that helps developers quickly style HTML documents without writing custom CSS or dealing with class-heavy frameworks, making it a decent choice for simple, semantic styling needs, though it lacks the extensive ecosystem, community support, and advanced features of more established frameworks like Bootstrap or Tailwind CSS.

Why this product is good

  • Provides classless or minimal-class styling that works directly on semantic HTML elements
  • Lightweight footprint reduces page load times compared to bulkier frameworks
  • Simple to integrate for quick prototypes or small projects without a steep learning curve
  • Encourages clean, semantic HTML markup rather than div-heavy class-based structures

Recommended for

  • Developers building small to medium-sized websites who want quick styling without writing custom CSS
  • Beginners learning HTML/CSS who want to see immediate visual results with minimal setup
  • Projects prioritizing semantic HTML and minimal class usage
  • Quick prototypes, documentation sites, or internal tools where extensive customization isn't required

Category Popularity

0-100% (relative to Formfilled.io and KnowCSS)

Formfilled.io

KnowCSS

Sales
100 100%
Sales
0% 0
JavaScript
0 0%
JavaScript
100% 100
Web Analytics
100 100%
Web Analytics
0% 0
CSS
0 0%
CSS
100% 100

User comments

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What are some alternatives?

When comparing Formfilled.io and KnowCSS, you can also consider the following products

Attributer - Know what marketing channels are driving customers & revenue

HandL UTM Grabber - The easiest way to collect UTMs on your (optin) forms.

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