A free, AI-powered PDF editor for every device
Fillout records 3,923,917 monthly visits with -9.7% month-over-month growth and Freemium pricing. Instafill.ai records 35,630 monthly visits with -36.6% growth and Free Trial, Paid, Contact for Pricing pricing.

AI that fills your PDF and Word forms for you
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | fillout.com | instafill.ai |
| Pricing Model | Freemium | Free Trial, Paid, Contact for Pricing |
| Monthly Visits | 3.92M (3,923,917) | 35.63K (35,630) |
| MoM Traffic Delta | -423.16K (-9.7%) | -20.6K (-36.6%) |
| Primary Market & Share | 🇺🇸 United States (38.6%) | 🇺🇸 United States (68.3%) |
| Direct Visits / mo | 2.31M | 7.63K |
| User Rating | 4.4 | 4.3 |
| Supported Platforms | Website | Website |
Build powerful forms, surveys and quizzes with AI in minutes
Describe the form you need in plain language and Zite generates a branded form with logic, file uploads, and payments.
Add conditional logic, intelligent routing, and multi-step workflows to automate what happens after each response.
Respondents can log in to update their answers, and forms can be restricted to internal users only.
Use custom themes, fonts, logos, custom CSS, your own domain, and embed forms as popups, sliders, or full-screen pages.

AI that fills your PDF and Word forms for you
Automatically detects and maps every field in a flat PDF or Word form, using semantic understanding rather than rigid templates.
Each filled field can display its source and the reasoning behind the value, making verification fast and auditable.
Runs concurrent parallel field filling and handles structured row data, so multi-form packets and repeating tables are completed together.
An MCP server lets you fill PDFs from inside Claude Desktop, Code, or ChatGPT, plus n8n and Zapier automations for wider workflows.
A free, AI-powered PDF editor for every device

Free AI-powered PDF editor, converter and reader for every device
Free AI-powered PDF editor, converter and reader for every device
Chat with any PDF, video, or website and get cited answers in seconds
Broader template library and multi-channel sharing features, but less flexible multi-page layout customization than Fillout.
Chat with any PDF and get cited answers instantly
SpecialistSuperior privacy-first encryption and secure data handling, but more restrictive workflow automation and styling capabilities.
SpecialistSuperior privacy-first encryption and secure data handling, but more restrictive workflow automation and styling capabilities.

Faster AI form generation with built-in logic, but fewer advanced database integration and multi-page routing features.
Chat with any PDF and add an AI chatbot trained on your own content
Chat with any PDF and add an AI chatbot trained on your own content

SpecialistAI quiz, poll and survey builder that turns traffic into leads
SpecialistAI quiz, poll and survey builder that turns traffic into leads

Includes unique MCP server support and fast AI form generation, but less mature ecosystem and third-party integrations.
Free / Open-sourceFully open-source form builder with AI assistance, but lacks some of the advanced visual design customizability of Fillout.