Fillo

Let your coding agent build native forms into your product; Fillo handles the backend.

Freemium Coding & Development
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What is Fillo?

Fillo is a form infrastructure platform launched in September 2026 that lets coding agents build forms directly into your product with a single prompt. You own the route, UI, and design system while Fillo handles validation, file uploads, response management, versioning, and delivery, rendering accessible native HTML controls instead of iframes. It works with Claude Code, Codex, Cursor, GitHub Copilot, and Gemini CLI through an agent skill, supports React, Vue, Svelte, and Astro, and sends uploads browser-direct to S3, Google Drive, Box, or Cloudflare R2.

Key features

  • Coding-agent skill: one prompt provisions, builds, and previews a form in your app
  • Native form rendering with no iframes, matching your own design system
  • Validation, response management, versioning, and delivery handled behind the scenes
  • Browser-direct file uploads to connected S3, Google Drive, Box, or Cloudflare R2
  • React, Vue, Svelte, Astro, and plain browser app support via @usefillo packages
  • Attach account and page context to responses invisibly for downstream processing
  • Edit published forms without breaking old responses' schema context
  • Export responses or deliver them via webhooks and HubSpot integrations

Pros

  • Free tier includes 200 completed responses a month with no time limit
  • Native rendering keeps forms inside your product's design instead of a detached widget
  • Exceeding your allowance never stops a live form from collecting
  • Browser-direct uploads avoid routing large files through a middleman server

Cons

  • Very new product, launched September 2026, with a thin track record at scale
  • Agent setup still needs humans for workspace claiming and OAuth account connections
  • Per-response pricing can get expensive for high-volume forms versus flat-rate tools

Fillo at a glance

PricingFreemium
CategoryCoding & Development
Platformsweb
Official websitefillo.so
formscoding-agentsform-builderdeveloper-toolsfile-uploadswebhooksreact-components

How to choose the right Coding & Development tool

The right coding tool depends on where you write code and how much of your codebase it can understand. IDE integration is the first filter — a tool that lives in your editor, sees your project files and respects your stack will help far more than a general chatbot you paste snippets into. Look for accurate completions, clear explanations of suggested changes, and strong refactoring and debugging support for your main languages. Privacy deserves real attention: check whether your code is used for training, and whether a self-hosted or enterprise option exists for sensitive projects. Price against the hours it actually saves — most developers feel the difference within the first week of real use.

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Fillo FAQs

What is Fillo?

Fillo is a form infrastructure platform launched in September 2026 that lets coding agents build forms directly into your product with a single prompt. You own the route, UI, and design system while Fillo handles validation, file uploads, response management, versioning, and delivery, rendering accessible native HTML controls instead of iframes. It works with Claude Code, Codex, Cursor, GitHub Copilot, and Gemini CLI through an agent skill, supports React, Vue, Svelte, and Astro, and sends uploads browser-direct to S3, Google Drive, Box, or Cloudflare R2.

What are the main features of Fillo?

Fillo offers Coding-agent skill: one prompt provisions, builds, and previews a form in your app, Native form rendering with no iframes, matching your own design system, Validation, response management, versioning, and delivery handled behind the scenes, Browser-direct file uploads to connected S3, Google Drive, Box, or Cloudflare R2, React, Vue, Svelte, Astro, and plain browser app support via @usefillo packages, Attach account and page context to responses invisibly for downstream processing, Edit published forms without breaking old responses' schema context and Export responses or deliver them via webhooks and HubSpot integrations.

How much does Fillo cost?

Fillo follows a freemium model: a free tier is available, and paid plans unlock higher limits and advanced features. Check its official website for current plan prices.

What are the pros and cons of Fillo?

Strengths of Fillo include Free tier includes 200 completed responses a month with no time limit; Native rendering keeps forms inside your product's design instead of a detached widget; Exceeding your allowance never stops a live form from collecting. On the downside, Very new product, launched September 2026, with a thin track record at scale; Agent setup still needs humans for workspace claiming and OAuth account connections; Per-response pricing can get expensive for high-volume forms versus flat-rate tools.