Most business owners spend $3,000–$15,000 and four to six weeks every time they need a new landing page, internal tool, or marketing site. Replit Agent 4 is trying to change that equation entirely.

In this week's video, I went hands-on: built a real self-storage booking management tool from scratch — including a dashboard with live charts, a booking calendar, unit management, and a connected database. One prompt. One session.

Then I ran a security audit and found the part no one else is talking about.

⚡ What's new in Agent 4

Canvas mode, parallel task board, team collaboration, and one-click deployment with custom domains.

🔒 The security reality

After one unguarded prompt: no auth on API endpoints, exposed customer data, zero rate limiting. Critical — but fixable. I show you how.

💸 The real cost math

Starts at $25/month. One complex session costs $17 in credits alone. I break down when it makes financial sense — and when it doesn't.

🚫 When to still hire a developer

Scalable SaaS, compliance-heavy industries, deep custom builds. I give you the honest framework for making this call.

The real shift isn't 'hire developers to code.' It's: your whole team can now move fast without waiting on anyone.

Exact prompts used, what broke, what it cost, and a live demo you can follow along with.