# How to Vibe Code Your Own Demio (and Stop Paying for It)

> Hassle-free Webinar Software for Marketers

- Site: https://demio.com
- Category: Marketing & Events SaaS
- Platforms: Web app
- Verdict: **Serious undertaking** (35/100 vibecodeable)
- Estimated effort: 6-8 weeks of intensive development

## Verdict

Build a simplified personal webinar clone using LiveKit and Next.js, but expect significant friction around WebRTC media scaling and real-time state synchronization.

Replicating Demio as a solo developer is a serious challenge primarily because of the real-time WebRTC media architecture and synchronized interactive state. While building a registration page and chat box is straightforward, routing multi-person video feeds through a Selective Forwarding Unit (SFU) and keeping thousands of concurrent viewers perfectly synced on polls, handouts, and Q&A requires robust infrastructure engineering well beyond simple CRUD apps.

### What you can't replicate

- The enterprise trust and guaranteed uptime required for high-stakes corporate marketing events
- Native bidirectional compliance integrations with Salesforce, Marketo, and HubSpot
- Banzai's broader land-and-expand marketing ecosystem and customer base

## What it does

Browser-based webinar and virtual event software built for marketers, sales teams, and customer success professionals, featuring WebRTC streaming, engagement tools, and analytics.

### Core features

- Event creation & customized registration pages with custom form fields
- Automated email notifications and reminder workflows
- Browser-based WebRTC live video streaming stage for hosts and presenters
- Real-time interactive chat, Q&A upvoting, polls, and handouts
- Automated and on-demand webinar modes with simulated interactions
- Webinar analytics, engagement tracking, and attendee intent logs

## The business

### Pricing

- Starter Plan: $45/mo — Single host, 50 attendee room capacity, 3-hour session limit, up to 4 people on stage (billed annually).
- Growth Plan: Scales per host — For growing companies needing more brand control, bigger rooms, and multiple hosts.
- Premium Plan: $196/mo — Best value for business looking to host and analyze engaging webinars with dedicated account support.

### Funding

$21.2M raised.
- Bootstrapped initially
- 15M venture debt/equity round in March 2021
Investors: Columbia Pacific Advisors, Gaingels

Founded 2014.
Team size: ~100 employees (under Banzai family).

## The hard parts

- Multi-participant WebRTC SFU media routing for stable stage audio/video
- Synchronizing real-time websocket state across thousands of active session attendees
- Server-side video recording, transcoding, and on-demand stream pipelines
- Bidirectional OAuth API synchronization with external marketing tools and CRMs

## How to vibe code Demio

### Prerequisites

- Node.js (free): Required runtime for modern full-stack web development and package management.
- GitHub (free): Source control and deployment pipeline integration.
- LiveKit Cloud Account (Free tier available): Managed WebRTC infrastructure to handle multi-person stage video rooms without rolling a raw SFU.

### Recommended AI tools

- Claude Code: Best-in-class multi-file agentic coding tool for scaffolding complex full-stack apps and debugging WebRTC hooks.
- Cursor: AI-native code editor ideal for fine-tuning frontend UI components and React state flows.

### Stack

- Frontend: Next.js with Tailwind CSS and shadcn/ui
- Backend: Next.js App Router API Routes & Server Actions
- Database: Neon (Serverless Postgres)
- Auth: better-auth
- Payments: Stripe
- Other: LiveKit for WebRTC video rooms, Resend for email notifications, OpenAI API for AI chat moderation

### Hosting

- Vercel (Hosting the Next.js frontend and serverless API functions): $0-20/mo
- Neon (Serverless Postgres database for users, events, registrations, and chat logs): $0/mo (Free Tier)
- LiveKit (WebRTC media server infrastructure for live webinar rooms): $0-50/mo based on usage

### Build guide

1. **Project Scaffolding and Database Schema** — Initialize a Next.js project with Tailwind CSS, configure better-auth with Postgres via Neon, and set up relational data models for events, registrations, polls, and chat messages.

```
Initialize a new Next.js project with TypeScript, Tailwind CSS, and standard directory layout. Set up Prisma or Drizzle ORM connecting to Neon Postgres. Create database models for Users, Events (title, description, scheduled_at, duration, room_type), Registrations (event_id, email, name, custom_fields), Polls, and ChatMessages. Implement better-auth for user authentication with email and password. Ensure type safety across all database queries and build a clean landing page layout.
```

2. **Event Creation & Custom Registration Pages** — Build the host dashboard for scheduling webinars and generating public registration pages with custom fields and automated confirmation emails.

```
Build a host dashboard in Next.js where users can create, edit, and list webinars. Create a public registration page route `/register/[eventId]` that displays the event details, custom registration form fields, and submits lead data to the backend. Upon successful registration, trigger an email via Resend containing a unique join link and calendar invite data. Include input validation using Zod and handle error states gracefully.
```

3. **WebRTC Stage Integration via LiveKit** — Implement the live webinar room interface where hosts and presenters publish their camera/audio streams and attendees view the live feed.

```
Integrate LiveKit into the webinar room page (`/room/[eventId]`). Implement token generation on the backend using LiveKit server SDK, granting different permissions for Hosts (publish audio/video, manage chat, trigger polls) and Attendees (subscribe-only by default, with hand-raise capability to be promoted to stage). Build UI controls for muting audio, toggling video, and viewing participant lists.
```

4. **Real-time Engagement: Chat, Q&A, and Polls** — Add real-time interactive engagement features including public chat, threaded Q&A upvoting, and live audience polls.

```
Build a real-time engagement sidebar for the webinar room using WebSockets or LiveKit data channels/Supabase Realtime. Implement live public chat with emoji support and @mentions, a dedicated Q&A tab where questions can be submitted and upvoted by attendees, and a live polling widget where hosts can launch multiple-choice questions and display real-time percentage results to the audience.
```

5. **Demio AI Chat Moderation** — Integrate an AI moderation assistant that answers incoming participant questions on pre-recorded or automated webinar replays.

```
Implement an AI moderation feature for automated or on-demand webinars using the OpenAI API. When a participant sends a chat message while attending an on-demand session, route the prompt to an API endpoint containing event context and transcript snippets. Generate an automated response from the 'Demio AI' persona and inject it into the room chat stream with a custom AI badge.
```

6. **Analytics, Insights, and Export Center** — Create reporting dashboards tracking attendance rates, drop-off timelines, engagement actions, and lead export functionality.

```
Build a post-webinar analytics dashboard displaying total registrants, actual attendees, attendance rate, and engagement score per participant based on poll participation and chat activity. Include a timeline chart showing audience drop-off over the course of the session duration. Add a CSV export button allowing hosts to download registrant data and activity logs.
```

7. **Showcase Embeds & Polish** — Implement the Showcase feature to display upcoming events in a customizable widget embeddable on external websites.

```
Build a Showcase feature allowing hosts to generate an embeddable widget or standalone landing page showcasing their upcoming public events. Implement customizable layout options, color styling, and UTM source tracking on registrations originating from Showcase embeds. Perform end-to-end testing across registration, live room entry, engagement features, and analytics reporting.
```

### Cost vs paying

**Starting costs (one-time):**

- Custom Domain (optional): $12/yr
- AI Coding Assistant Subscriptions: $20
- Total: ~$32 one-time

**Ongoing costs (monthly):**

- Vercel Hobby / Pro Hosting: $0-20/mo
- LiveKit Cloud Usage: $0-20/mo
- Resend & OpenAI API Usage: $5/mo
- Total: ~$15-45/mo

- Paying for the SaaS instead: $45/mo - $196+/mo
- Build time: 50-70 hours
- AI tool credits: $20/mo (Claude/Cursor Pro)
- Break-even: Viable immediately if hosting regular client webinars; otherwise pure learning project.

## Sources

- [Demio Official Website & Pricing](https://demio.com)
- [Banzai Acquires Webinar Platform Startup Demio - Business Wire](https://www.businesswire.com/news/home/20210203005232/en/Banzai-Becomes-1st-Complete-Event-Solution-by-Acquiring-Top-Rated-Webinar-Startup-Demio)