We recently spent about 20 hours vibe coding on Replit and can confirm its CEO is not Yuri from Red Alert.
For beginners looking to vibe code their first app, Replit with Agent 3 is so easy to use that anyone with a pulse can build an app, even total newbs.
Unfortunately, most users never move past this stage, and neither do their apps.
Replit offers simple steps that instantly spare a project from issues plaguing 99% of projects, and below we present an objective look at Replit along with our own recommendations, broken down into:
- a brief introduction to Replit
- Agent 3 and its unique selling points
- how to get started
- Upstacker tips on how to use Replit properly
- recommendations from Reddit
- comparisons to alternatives
- setting expectations as a vibe coder
Let’s begin.
Replit Overview
Replit has been around since 2016, long before “vibe coding” was even coined.
It originally launched as a cloud IDE built for full-on developers.
But visit Replit today and you’ll see a very familiar prompt box.
Pair that with a tagline like “Turn your ideas into apps”, and it’s clear Replit is now selling to non-technical founders and businesses looking to build apps with AI.
Does that matter? Speaking as developers, yes, it does: Think WordPress vs Wix.
- WordPress, launched in 2003, was built for blogging and everything else requires bolting on plugins, features, and custom code.
- Wix, which came later, was made from day one for non-technical users to build functional, modern websites without touching code.
As a result, most non-tech users have a far easier time using Wix.
Our point is just that digital tools built for a purpose from the beginning tend to outperform alternatives that started life as something else and later pivoted.
Key Features
Replit’s features make it a full stack no code app builder, a fancy way of saying you can build a complete app with just Replit instead of having to use multiple tools.
Specifically, Replit has a built-in:
- Hosting option
- Front-end builder
- Database & storage
- Security & testing
- External tool integrations (including SMS and payment processing)
And of course, as a vibe coding platform, sitting on top of it all is Replit’s Coding AI agent which allows users to access and make use of these features with natural language.
Currently, the AI is known as Agent 3, and it’s cool enough to get its own section!
Agent 3
Agent 3 is the successor to Agent 2, and according to Replit, delivers a significant performance jump to the point Replit positions it as a ‘genuine assistant’.
Having seen both the Ferrari F40 and F50 in the metal, we’re sceptical when manufacturers claim “progress” (F50 lovers can fight us) but Agent 3 does offer three genuinely new capabilities.
Code Self-Testing
Agent 3 doesn’t generate code once and immediately ship. It actively tests what it builds, fixes issues, and retests in a reflection loop without manual intervention.
200-Minute Runtime
If the instruction justifies it, Agent 3 can continue running for extended periods which helps handle complex tasks without breaking down or compromising the end result.
Expect the token cost to be correspondingly high, though!
Custom Agent Creation
Agent 3 can build additional agents to automate complex or repetitive workflows that can be integrated into tools like email or Slack.
Tools like N8N already let you automate workflows, but they are not app builders like Replit.
The implication here is that you can build both custom apps and custom agents and integrate them all on one platform.
Getting Started
This section is going to be short cause like we said, Replit is so easy to use that starting is the equivalent of inhaling oxygen.
Once you sign up and sign in, you get taken to your profile.
Click on Create App, you get asked to describe your project, and Agent 3 gets to work.
For our review, we decided to vibe code an app development cost calculator, periodically referring to Replit’s documentation to troubleshoot.
Twenty hours and several prompts later, we were out of tokens but had a decent app with:
- Every feature we wanted
- Storage
- User authentication and sign-up
- Gmail integration
You can check it out here if you want, and in the next two sections we cover practical tips and recommendations to skip your newbie vibe coder phase.
Our tips
Do these four things and your app will look and work better than almost any beginner vibe-coded project.
Import Designs from Figma
The same way unedited AI copy is easy to spot, default vibe-coded designs also have a look.
They’re not ugly, but they are generic and Replit knows it because they’ve made it incredibly easy to import designs directly from Figma by:
- Going to Figma’s massive library of templates
- Finding a UI that matches the type of app you’re building
- Importing it into the Replit project!
Agent 3 will reference and use it to build your front end, and this alone puts you ahead of most vibe coded projects.
Add Authentication and Sign-Ups
If an app is meant to have more than one user or offered to businesses, authentication and sign-ups is a no brainer as people expect their data to be protected and kept separate.
On Replit, you simply instruct Agent 3 to “add authentication and sign-ups” and it generates:
- sign-up and login pages
- Google / Gmail sign-in
- two-factor authentication
One thing to note: By default, this prompt often locks the entire app behind a login.
That’s fine for internal tools but for public-facing apps it’s usually better to allow users to explore the app with the option to sign up to save their data.
This is something you can easily set, so it’s up to you.
Specify Database Needs
New vibe coders tend to be front-end heavy and neglect the backend where real work happens.
A database is where:
- user data lives
- product information is stored
- files, images, and documents are managed
- data is retrieved and combined
All that is pretty damn important!
Once again, you can tell the agent to “add a database and storage” and it handles the setup.
We strongly suggest you plan what data you want and how you want it stored from the start.
Integrate Existing Tools
Modern software, especially SaaS products, almost always piggyback on other B2B tools and Replit lets us connect to these tools with simple authentication flows.
In fact, we’re not limited to connecting our accounts, but also allowing users to connect their accounts, including their:
- Gmail
- Notion pages
- project boards
- Calendars
Just like a proper SaaS!
Replit even offers Spotify integration which we’ve personally never needed in nearly a decade of app development, but we’ll never say no to an API that brings us closer to Radiohead!
Community Recommendations
Our 20 hours building with Replit is a fraction of the countless hours poured into it by the community
We trawled Reddit and summarized their collective wisdom into 12 main tips:
- Build one feature at a time and keep tasks small to prevent breaking the project.
- Tell the Agent exactly what it can touch and reference files directly to avoid unwanted changes.
- Develop in branches, test before merging, roll back often, and never edit production directly.
- Always read the Agent’s plan and assumptions before approving changes to catch mistakes early.
- Start a new chat when stuck or beginning a new feature to avoid context confusion.
- Upload a clear PRD or bug description so the Agent understands intent precisely.
- Use the Agent for architecture, scaffolding, and automation, and Assistant for coding, QA, and updates.
- Ask the Agent to write unit tests, add logging, and create test scripts to prevent silent failures.
- Keep secrets out of the frontend and implement environment variables, rate limiting, and captcha.
- Paste files into ChatGPT or switch editors/models if the Agent can’t resolve an issue.
- Let the Agent create README.md, ReleaseNotes.md, and workflow scripts to document everything.
- Keep code tidy, name things clearly, test everything, and step away when debugging stalls.
Some of these tips require familiarity with the platform, but we think just reading this list can subconsciously prime you to put them into action as soon as the first opportunity presents itself.
Comparison to Alternatives
Beginners entering this space get bombarded with a bunch of names that all sound cool.
To cut through the mess, we start by broadly separating vibe coding tools into two categories:
- Tools for non-techs – Can build entire apps with prompts and no coding knowledge.
- Tools for developers – Helps developers code faster and needs coding knowledge.
Replit is a non-tech tool, and should only be compared to other non-tech vibe coding platforms.
That said, there are too many and we’re not in the business of making comically long lists.
So we’ll just give you a brief comparison against Bolt and Lovable, which are equally popular:
| Platform | Basic Plan | Agent Capabilities | Deployment / Hosting |
| Replit | $20/month | Self-review code; 200-minute runtime; build other agents | Hosts on Replit servers |
| Lovable | $25/month | Self-review code | Relies on Supabase |
| Bolt | $25/month | Leverages Claude agent | Relies on Supabase |
Just based on this table, Replit looks like one we’d recommend for most beginner vibe coders or really anyone looking to vibe code their app without writing code.
This is before going into the no code app builders like FlutterFlow and Bubble, but we don’t want to overload you.
Most similar tools work similarly enough that the best thing is to jump into one and start building.
We wish you all the best!
If you’re looking to build a custom app, check out our portfolio of past projects and contact us if you like what you see. Also, consider joining our mailing list for a one-stop resource on everything from SaaS validation to execution and promotion. Get a nifty list of questions to ask app developers when you sign up!
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