# How to Vibe Code Your Own Heyflow (and Stop Paying for It) > Convert more website visitors into leads with interactive funnels - Site: https://heyflow.com - Category: SaaS / Marketing Tools - Platforms: Web app - Verdict: **Solid side project** (68/100 vibecodeable) - Estimated effort: 3-4 weeks of focused building and debugging ## Verdict You can build a functional personal funnel builder clone for self-hosting in a couple of weeks, but replicating the bulletproof third-party web component embed architecture and expansive native integration ecosystem requires heavy engineering. The core value of a tool like Heyflow—visual multi-step form building and conditional branching—is entirely achievable as a solid side project using React, Tailwind CSS, and a PostgreSQL database. However, getting published funnels to embed seamlessly into external client websites via lightweight web components without breaking host CSS, maintaining 90+ PageSpeed scores, and wiring up server-side Conversions APIs will consume significant debugging hours. If your goal is simply to run your own marketing funnels without paying software fees, vibecoding this is a viable weekend-to-weeks project; if you expect a drop-in commercial replacement for thousands of customer integrations, keep paying. ### What you can't replicate - Pre-built native integrations for 50+ enterprise CRMs and marketing tools - Carrier-level phone validation networks and SOC 2 Type II compliance certificates - Historical ad-spend performance benchmarks trained on hundreds of thousands of live funnels ## What it does An end-to-end, no-code conversion rate optimization and interactive funnel-building platform for multi-step forms, quizzes, and lead generation. ### Core features - Visual drag-and-drop block builder for multi-step flows - Complex conditional logic and branching engine - Responsive web component publishing for third-party embedding - Server-side ad tracking integrations (Meta CAPI, TikTok CAPI) - Native A/B testing and drop-off funnel analytics - Modular feature extensions (calculations, phone validation, payments) - CRM and automation webhook routing (HubSpot, Slack, Zapier) ## The business ### Pricing - Starter / Growth: €89/mo — Entry tier for small businesses and marketers starting with response volume. - Scale: €239/mo — Complete toolkit for scaling teams with advanced tracking and testing. - Prime: €199/mo — Built for high-traffic eCommerce stores with visitor-based quotas. - Enterprise: from €1,100/mo — Tailored enterprise solutions with custom security and high response limits. ### Funding $22M raised. - Seed Round (September 2021) - $6M - Series A Round (February 2024) - $16M Investors: Project A Ventures, Singular, Atlantic Labs, Possible Ventures Founded 2020. Team size: 50-80. ## The hard parts - Building a high-performance web component loader that injects cleanly into third-party websites without iframe layout shifts or exceeding a 300ms mobile load speed - Executing real-time client-side state management for branching conditional logic, input masks, and dynamic variable mapping - Handling server-side event dispatching for ad pixels (CAPI) reliably to bypass client ad-blockers - Designing a flexible multi-step block rendering architecture supporting dynamic styles and custom CSS injection ## How to vibe code Heyflow ### Prerequisites - Node.js (free): Runtime environment for building and executing the Next.js web application. - GitHub (free): Source control and automated deployment trigger for hosting. ### Recommended AI tools - Claude Code: Best-in-class terminal coding agent for scaffolding multi-file React architectures, handling complex state management logic, and debugging API routes. - Cursor: Ideal AI code editor for fine-tuning visual drag-and-drop block components and editing Tailwind styles interactively. ### Stack - Frontend: Next.js with Tailwind CSS, shadcn/ui, and lightweight Web Components for funnel embedding - Backend: Next.js API routes / Server Actions - Database: Neon (Serverless Postgres) - Auth: better-auth - Payments: Stripe - Other: Resend for transactional alerts, Zod for schema validation ### Hosting - Vercel (Hosting the Next.js builder dashboard and serving published high-performance funnel web components): $0-20/mo - Neon (Serverless PostgreSQL database storing funnels, steps, blocks, and response submissions): $0/mo ### Build guide 1. **Database Schema & Project Scaffolding** — Initialize the Next.js project with Tailwind CSS, Prisma or Drizzle, and Neon PostgreSQL, setting up relational schemas for funnels, pages, blocks, variables, and responses. ``` Initialize a new Next.js project with TypeScript, Tailwind CSS, and shadcn/ui components. Configure Drizzle ORM to connect to a Neon PostgreSQL database. Create database migrations and schema definitions for: `funnels` (id, title, settings, user_id, created_at), `steps` (id, funnel_id, title, order_index), `blocks` (id, step_id, type, config_json, position), and `responses` (id, funnel_id, data_json, completed_at). Include proper foreign key constraints, indexes on funnel_id, and Zod validation schemas for all table inserts. ``` 2. **Authentication & Dashboard Foundation** — Implement self-hosted authentication with better-auth and build the main dashboard listing user funnels, response analytics counters, and creation modals. ``` Integrate better-auth into the Next.js application supporting email/password sign-up and session management. Build a protected dashboard layout with a sidebar and main content area. Create a funnels list view showing active funnels, total submission counts, and conversion rates fetched from the database. Add a modal and server action to create a new empty funnel with default settings. ``` 3. **Visual Funnel Builder Editor** — Build an interactive multi-step visual canvas where users can add, reorder, and configure various block types (headings, multiple-choice options, input fields, buttons). ``` Build a visual funnel editor page in Next.js where users can manage multi-step flows. Implement a sidebar component catalog (Text, Input, Multiple Choice, Button, Calender, Stripe) and a central canvas showing the active step. Allow users to add blocks to a step, reorder them, configure block properties (labels, placeholders, options) in a right-side inspector panel, and save changes back to the database via server actions with optimistic UI updates. ``` 4. **Conditional Logic & Variable State Engine** — Implement the core runtime evaluation engine that tracks user inputs, populates system variables, and computes branching rules to navigate between steps. ``` Implement a client-side execution engine for rendering published funnels. Maintain a reactive state store (using React Context or Zustand) tracking user input variables across steps. Build a conditional logic builder UI in the editor allowing rules such as 'If Answer X equals value Y, jump to Step Z'. In the runtime player, evaluate these conditions dynamically on next-step navigation to route users correctly. ``` 5. **Published Web Component & Embed Script** — Create a standalone web component or embed script output that renders published funnels instantly on external websites without style leakage. ``` Create a publish route in Next.js that compiles a funnel into a standalone, lightweight JavaScript bundle packaged as a Custom Element (Web Component). Ensure the component encapsulates its styles using Shadow DOM to prevent CSS pollution on host websites, loads in under 300ms, communicates with backend API endpoints to submit responses, and supports inline rendering as well as popup triggers via a simple script tag snippet. ``` 6. **Analytics, Webhooks & Response Management** — Build the response viewing interface, analytics drop-off tracking per step, and webhook dispatching on form submission. ``` Build a responses tab in the funnel dashboard showing submitted lead data in a tabular view with CSV export capability. Implement step-by-step drop-off analytics tracking by recording funnel view and step progression events in the database. Add a webhook configuration section allowing users to supply an endpoint URL that triggers a background fetch POST request containing payload data whenever a funnel response is successfully completed. ``` ### Cost vs paying **Starting costs (one-time):** - AI coding assistant subscription: $20 - Total: $20 one-time **Ongoing costs (monthly):** - Vercel Hobby / Pro hosting: $0-20/mo - Neon serverless database: $0/mo - Total: ~$0-20/mo - Paying for the SaaS instead: €89/mo (Growth tier) to €239/mo (Scale tier) - Build time: 40-60 hours - AI tool credits: $20 (one month of Claude Pro / Cursor) - Break-even: Immediate ## Sources - [Heyflow Marketing Website & Product Pages](https://heyflow.com) - [GetLatka Heyflow Revenue & Valuation Profile](https://getlatka.com/companies/heyflow) - [Tracxn Heyflow Company Profile](https://tracxn.com/d/companies/heyflow)