replit-architecture-variants

name	replit-architecture-variants
description	Choose and implement Replit architecture blueprints: single-file script, modular app, and multi-service. Use when designing new Replit apps, choosing the right architecture scale, or planning migration paths as your app grows. Trigger with phrases like "replit architecture options", "replit blueprint", "how to structure replit app", "replit monolith vs service", "replit app scale".
allowed-tools	Read, Grep
version	1.12.0
license	MIT
author	Jeremy Longshore <[e-mail]>
tags	["saas","replit","architecture","scaling"]
compatibility	Designed for Claude Code, also compatible with Codex and OpenClaw

Replit Architecture Variants

Overview

Application architectures on Replit at three scales: single-file prototype, modular production app, and multi-service architecture. Each matches Replit's container model, built-in services, and deployment types.

Prerequisites

• Replit account
• Understanding of deployment types (Static, Autoscale, Reserved VM)
• Familiarity with Replit's storage options

Architecture Decision Matrix

Factor	Single-File	Modular App	Multi-Service
Users	Prototype, < 100/day	100-10K/day	10K+/day
Database	Replit KV (50 MiB)	PostgreSQL	PostgreSQL + cache
Storage	Local + KV	Object Storage	Object Storage + CDN
Persistence	Ephemeral OK	Durable required	Durable required
Deployment	Repl Run / Autoscale	Autoscale / Reserved VM	Multiple Reserved VMs
Cost	Free-$7/mo	$7-25/mo	$25+/mo
Always-on	No (free), Yes (deploy)	Yes (deployment)	Yes (deployment)

Instructions

Variant A: Single-File Script (Prototype)

Best for: Bots, scripts, learning, hackathon projects.

# main.py — everything in one file
from flask import Flask, request, jsonify
from replit import db
import os

app = Flask(__name__)

# KV Database for simple state
@app.route('/')
def home():
    count = db.get("visits") or 
    db[] = count + 
     


 ():
     request.method == :
        note = request.json
        notes = db.get()  []
        notes.append(note)
        db[] = notes
         jsonify(note), 
     jsonify(db.get()  [])

app.run(host=, port=(os.environ.get(, )))