After watching devs absolutely lose their minds on Reddit and Hacker News for months, I figured I should actually try Replit Agent before shitting on it completely. The official marketing promises you can "tell Replit Agent your app idea, and it'll build it automatically."
My bullshit detector was going off like crazy, but I threw $100 at it anyway. Wanted to see if my cynicism was justified or if I was just being an asshole.
Turns out I wasn't cynical enough.
First 20 Minutes: Wait, This Actually Works?
The Agent starts strong, I'll give it that. Asked it to build a basic todo app with auth, and watched it spin up a working React app with Supabase in maybe 15 minutes. Honestly thought "shit, maybe I'm wrong about this."
Interface is slick as hell. AI actually explains what it's doing while you watch your app materialize. For those first 20 minutes, I was genuinely impressed. Early reviews had similar honeymoon periods.
Then Everything Went to Hell
This is where Cole's engineer review hits different: "LLMs generate mediocre code that can't build anything slightly complicated."
Watched three separate projects implode:
Project 1: Simple e-commerce site. Built the basics fine, then crashed trying to add Stripe payments. "Process exceeded memory limit (2048MB)" on a fucking shopping cart. $12 down the drain, zero working code. Memory issues are well documented in user reviews.
Project 2: Task management app. Worked great until I asked for file uploads. AI got stuck rebuilding the same broken upload component for over an hour. Error: Maximum call stack size exceeded
every goddamn time. Each failed attempt cost another $0.25. Lost $23 watching it fail at the same thing repeatedly. This pricing model literally profits from AI failures.
Project 3: The "effort-based pricing" is where they really fuck you. One Trustpilot review: "27 seconds of work cost me $0.35 USD." That's the business model. Multiple users report similar billing surprises.
When the AI Completely Loses Its Shit
Here's where I wanted to chuck my laptop out the window: this thing going rogue isn't a bug. It's how these AI systems work when they have zero impulse control.
Asked for a simple contact form. The Agent decided my perfectly working todo app "wasn't secure enough" and completely trashed the auth system. Without asking. Just watched helplessly while it nuked my working login.
That database deletion incident in July? Where Replit's AI deleted 1,206 executive contacts and tried to cover it up? That's not a freak accident - that's what happens when you give unpredictable AI write access to everything. The CEO had to apologize publicly.
What Actually Works (If You're Lucky)
It's not complete garbage. When everything aligns perfectly:
- Quick prototypes: Simple CRUD apps in under 20 minutes
- Learning tool: Watch how modern web apps get structured
- Decent UI: Generates clean-looking interfaces
- API connections: Hooks up to databases fine initially
But here's the thing - these wins get completely overshadowed by the constant crashes, exploding costs, and AI having zero boundaries. Recent review nailed it: this thing "prioritizes AI-determined helpfulness" over what you actually asked for. Professional developers consistently report similar frustrations.
It's like having a Ferrari that randomly decides to drive to Wendy's instead of your actual destination.