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Fill out, legally e-sign, and download official 2026 IRS Forms in minutes. Generate multi-state paystubs with exact federal and state tax withholdings, track IRS refund status, and verify business EINs with 100% client side zero knowledge security.

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Website, pricing, platforms and company facts side by side.
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| Website | easyw9form.com | diffyn.com |
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| Company | Startup from the United States · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


EasyW9Form is a free online platform that makes common tax, financial, and business paperwork easier to create and complete. Built for freelancers, independent contractors, landlords, LLCs, and small businesses, EasyW9Form provides simple browser-based tools for everyday documentation. Users can...
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The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing EasyW9Form and Diffyn.
EasyW9Form's answer
EasyW9Form combines free U.S. tax and contractor document tools in one simple platform. Users can create W-9 and W-8BEN forms, generate invoices and paystubs, and access practical tax resources without creating an account. The platform is designed to make common contractor and small-business paperwork faster and easier while keeping the experience simple and accessible.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
EasyW9Form's answer
EasyW9Form is designed for people who want to complete common U.S. tax and contractor paperwork without unnecessary complexity. It provides free online tools for W-9 and W-8BEN forms, invoices, paystubs and related tax resources in one place. There is no need to navigate complicated software or sign up for a subscription just to complete a basic document.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
EasyW9Form's answer
Next.js, React, JavaScript, CSS, and PDF generation libraries.
Diffyn's answer:
React, Next.js, POSTGRESQL
EasyW9Form's answer
EasyW9Form is primarily built for U.S. freelancers, independent contractors, self-employed professionals, small-business owners, landlords, vendors, and businesses that need to collect or prepare common tax and payment documents.
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
EasyW9Form's answer
EasyW9Form was created to make everyday U.S. tax and contractor paperwork easier to handle online. Forms such as the W-9 are common for freelancers, contractors, vendors and businesses, but completing and managing these documents can often feel unnecessarily complicated.
The goal behind EasyW9Form is simple: provide straightforward, free online tools that help people create and understand common tax and business documents without requiring complicated software or subscriptions.
The platform has since expanded beyond the W-9 to include tools and educational resources for W-8BEN forms, invoices, paystubs, tax calculations and other contractor and small-business needs.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
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