a marketplace for products and services
PROJECT OVERVIEW
What this app does
This marketplace app supports a small community of 10 registered users who can browse, list, and purchase products or services. Members can manage their own listings, complete purchases, review their orders, and track sales related to the offerings they publish.
As an anonymous visitor, I can browse active products and services and view listing details
As a marketplace member, I can browse available products and services and view listing details
As a marketplace member, I can publish and manage my own product or service listings
As a marketplace member, I can purchase a listed product or service through checkout
As a marketplace member, I can review my purchase history and payment status
As a marketplace member, I can review purchases of my listings and update fulfillment progress
The following user counts are projected totals after one year of growth
10
marketplace_members
Registered users who may browse, publish listings, purchase offerings, and manage purchases or sales.
1000
anonymous_visitors
Public visitors who can browse active products and services but cannot list or purchase until registered.
COST BREAKDOWN
How your requirements become a plan and a price
Momen doesn't give a vague quote: it first sizes the project's actual demand for each capability and resource, then costs each item out. The numbers in the 'Project demand' column below — their scale assumptions and derivations — are detailed in Scale & sizing
Minimum viable plan
PRO
Marketplace checkout requires payment collection.
See the capability-by-capability assessment ▾
PROJECT DEMAND
ALLOWANCE PROVIDED (COMPOSITION)
AI points add-on
x 0
0 points
not purchased
(plan/kit 5.0M points)
No requirement
$ 0
Outbound data transfer add-on
x 0
8.84 GB/mo
not purchased
(plan/kit 10.00 GB/mo)
Covered by plan/kit (margin ~13%)
$ 0
Object storage
add-on
x 0
19.25 MB
not purchased
(plan/kit 10.00 GB)
Covered by plan/kit (margin ~51848%)
$ 0
Database storage add-on
x 0
21.63 MB
not purchased
(plan/kit 1.00 GB)
Covered by plan/kit (margin ~4523%)
$ 0
single-tenant kit
x 0
1 req/s
not purchased
(plan/kit 25 req/s)
Covered by plan/kit (margin ~2400%)
$ 0
PRO
x 1
Pro is the minimum viable plan
Pro
(Plan tier: PRO)
See minimum viable plan above
$ 99
plan + add-ons · usage-based · no development cost
WHY MOMEN
Your options for this project
In the table below, the 'monthly infrastructure' for the self-built / AI routes is derived from the AWS list prices shown below, sized against this project's actual usage. Figures cover infrastructure and operations only — AI usage is billed separately and excluded here, so they don't match the $99/mo all-in above.
Current usage sizing
AWS list pricing
0.00 GB (first 100GB free)
Internet egress → 0
0.02 GB-month
S3 Standard → 0
0.02 GB-month
RDS gp3 storage → 0
2 × db.m6g.large (Multi-AZ) × 730h
RDS PostgreSQL db.m6g.large → 232.14
2 × t4g.large × 730h
EC2 t4g.large → 98.11
Total ≈ $330.25 / mo
Pure cloud resources
DEVELOPMENT COST
MONTHLY CLOUD INFRA ($/MO)
MONTHLY TOTAL (INFRA + OPS, EXCL. AI USAGE)
Traditional outsourcing / build in-house
about $45,000 - $75,000
≈ $330
Based on the AWS estimate above
≈ $2,330
Infra $330 + ops ~$2,000
4-6 months
5 / 5
Vibe Coding
about $8,000 - $15,000
≈ $330
Based on the AWS estimate above
≈ $1,830
Infra $330 + ops ~$1,500
hours
5 / 5
AI full-stack generation
about $4,000 - $8,000
≈ $330
Based on the AWS estimate above
≈ $1,830
Infra $330 + ops ~$1,500
hours
3 / 5
Off-the-shelf SaaS / vertical solution
$0
N/A
Priced per seat, not by cloud infra
≈ $16,000+
Per-seat pricing, tens of thousands of users
days
1 / 5
Momen
Recommended
$0
$99
All-in: egress / storage / auto-scaling; excludes AI usage
$99
hours
5 / 5
Servers, databases, traffic and storage are inherent infrastructure costs for this project — you pay them whether you outsource, use Cursor or Lovable, or build it yourself (self-built runs ≈ $330.25/mo at AWS list prices, often more), on top of the dev and ops staff you'd need to hire. Momen bundles all of it into $0/mo all-in and removes the need for an ops team.
The frontend can be generated with AI tools (Cursor, Lovable, etc.); the hard part is the backend — auth, database, scaling, data security and ops. Momen delivers a production-grade backend as a BaaS: keep the vibe-coding speed on the frontend, while the backend runs on proven infrastructure — reliable, with no self-hosting or ops.
SCALE & SIZING
What scale this estimate assumes, and how the numbers are derived
Cost depends heavily on usage volume. First see the key assumptions and business scenarios this estimate uses, then the full calculation derived from each scenario for every resource — all adjustable to your real situation
We assume exactly 10 registered accounts because the project explicitly states that the marketplace is designed to support 10 users. Anonymous browsing visitors are tracked separately and are not included in this registered-account total. If the stated figure is instead a concurrency target rather than the complete registered pool, this parameter can be adjusted accordingly.
We assume the app reaches its stated ten-user ceiling relatively early and then operates at a stable level because this is typical for a deliberately small marketplace pilot. An early-burst followed by a plateau is therefore a better fit than continuous large-scale user growth. If your actual launch follows a slower linear adoption pattern or begins with a full pre-existing dataset, this parameter can be adjusted accordingly.
Daily Marketplace Discovery
Daily Marketplace Discovery
Daily Marketplace Discovery
Daily Marketplace Discovery
30
times/month
0.01 req/s
Peak load
We assume public and member browsing is spread across a twelve-hour daily window because small marketplace discovery is normally asynchronous throughout waking hours. Anonymous and registered browsing share the same period and purpose, but registered purchasing is excluded and modeled separately because checkout has a distinct transactional purpose. The scenario occurs every day in a typical month. If the marketplace serves a narrower geography or operates only during business hours, the duration and frequency can be adjusted accordingly.
Main impact: Peak Concurrency
The scenarios above set the assumptions for each resource; below is the full calculation derived from them. Click to expand each item.
DEVELOPMENT SCOPE
How this app works
What exactly does this budget support? Broken down by business scenario, showing the pages, data tables, automation flows and AI assistant behind each one
A member reviews orders placed against owned listings and updates their delivery or service progress.
Marketplace Browse Page
users
A member publishes a product or service and later reviews or edits that listing.
Marketplace Browse Page
users
A registered member discovers an offering, starts payment, checks the result, and reviews the resulting purchase.
Marketplace Browse Page
users
place_marketplace_order
A browsing-only visitor reviews available offerings and opens one listing for more information.
Marketplace Browse Page
users
page
data_table
action_flow
Payment Result Page
Displays the payment and order status after hosted checkout.
Sales Management Page
Allows members to review purchases of their listings and update fulfillment progress.
My Purchases Page
Displays the current member's purchase records and their current statuses.
My Listings Page
Shows a member's listings and supports editing or changing their availability status.
Create Listing Page
Allows a registered member to publish a product or service offering.
Listing Detail Page
Shows one product or service listing and provides the registered-member purchase entry point.
Marketplace Browse Page
Displays active product and service listings for marketplace discovery.
FAQ
What you might want to know about this project
The Q&A below is generated by AI based on this project's type, features and scale
Is an external payment provider required?
What most affects this app's resource usage?
Does the marketplace include a multi-item shopping cart?
Can the same user both list and purchase offerings?
Copy to discuss with AI
Challenge & re-estimate
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