What is 'vibe coding'?

Vibe coding means building software primarily by prompting an AI agent in natural language, describing what you want and letting the AI generate and wire up the code, rather than writing most of it by hand. The author tested whether this could produce a full SaaS app using Replit's AI agent.

Can you really build a full SaaS app with AI?

Yes, to a real extent. In about 20–25 days the author shipped a live product (Taxformify) with secure authentication, user dashboards, Stripe payments, and notifications, features you'd expect from a standard SaaS, built largely through Replit's AI agent.

Where does vibe coding hit its limits?

AI shines at scaffolding and the fast initial build, but struggles with complex debugging, security hardening, and bigger architectural decisions. At those points you need real engineering judgment, vibe coding speeds you up but doesn't remove the need to understand what's being built.

What tools were used?

The experiment used Replit and its built-in AI agent as the main development partner, with Stripe for payments, building and launching the SaaS app (Taxformify) end-to-end within a self-imposed 20–25 day constraint.

SoftwareAIBusiness

Vibe Coding a SaaS App: Can You Really Build a Full Product with AI?

By Rashad Bayram•May 1, 2025•Updated July 9, 2026•3 min read

Get founder resources worth your inbox

Occasional, practical writing on startups, Islamic finance, AI, and building. No spam, unsubscribe anytime.

Frequently Asked Questions

What is 'vibe coding'?: Vibe coding means building software primarily by prompting an AI agent in natural language, describing what you want and letting the AI generate and wire up the code, rather than writing most of it by hand. The author tested whether this could produce a full SaaS app using Replit's AI agent.
Can you really build a full SaaS app with AI?: Yes, to a real extent. In about 20–25 days the author shipped a live product (Taxformify) with secure authentication, user dashboards, Stripe payments, and notifications, features you'd expect from a standard SaaS, built largely through Replit's AI agent.
Where does vibe coding hit its limits?: AI shines at scaffolding and the fast initial build, but struggles with complex debugging, security hardening, and bigger architectural decisions. At those points you need real engineering judgment, vibe coding speeds you up but doesn't remove the need to understand what's being built.
What tools were used?: The experiment used Replit and its built-in AI agent as the main development partner, with Stripe for payments, building and launching the SaaS app (Taxformify) end-to-end within a self-imposed 20–25 day constraint.

About the author

Rashad Bayram

Writer & technology consultant focused on Islamic finance, halal Bitcoin, AI agents, and startups. Exploring ideas that matter with care and curiosity.

More about Rashad Bayram →LinkedIn X / Twitter

Continue Reading

Business

Form 8878 vs 8879: Which IRS e-File Authorization Do You Need?

Form 8879 authorizes e-filing a tax return; Form 8878 authorizes e-filing an extension with a payment. Here is the difference, and when you need each one.

Continue reading →

Business

Where Do Software Subscriptions Go on Schedule C?

Software and SaaS subscriptions have no dedicated Schedule C line. Here is where they actually go, Office expense or Other expenses, and how to stay consistent.

Continue reading →

Business

T183 Electronic Signature: The CRA Rules and How to Collect One Cleanly

The CRA accepts electronic signatures on the T183, with no identity quiz required. Here is what the rules require, and how to collect a clean signed T183.

Continue reading →