AI System Design Generator

Describe your project,
get a full blueprint.

Enter a plain-language description and receive architecture diagrams, requirements, API specs, and capacity estimates — instantly.

e.g. “

Generates specs forREST APIsPlantUMLMicroservicesPostgreSQLRedisKafkaKubernetesReact

What you get

Every artifact
your system needs.

From a single prompt, KosmosBuild produces a complete system design package ready to hand off to your team.

Architecture Diagrams
Auto-generated PlantUML system diagrams — sequence flows, component maps, data models — exported as SVG, PNG, or PDF.
Requirements Analysis
Functional and non-functional requirements extracted and structured automatically from your plain-language description.
API Design
REST endpoint scaffolding with HTTP methods, paths, and descriptions — ready to drop into your OpenAPI spec.
Capacity Estimation
Traffic projections, storage needs, bandwidth, and infra sizing so you can plan before you build.
Tech Stack Recommendations
Curated technology choices mapped to your domain — databases, queues, caches, and frameworks.
Export Everything
One-click PDF of your entire system blueprint. Share with your team or include it in your pitch deck.

Process

Up and running
in three steps.

01
Describe your system
Type a plain-language description of what you want to build — no jargon required.
02
AI generates your blueprint
KosmosBuild analyzes your input and produces diagrams, requirements, and API specs in seconds.
03
Export & iterate
Download your system design as PDF, SVG, or PNG. Refine with a new query anytime.

Live preview

See what gets generated.

A snapshot of a real output for an e-commerce platform query.

kosmosbuild.app/generate/e-commerce-platform
Query
E-commerce platform with inventory management
Daily Users
50K
~35 req/s
Storage
2.4TB
incl. media
Bandwidth
180GB
per month
Services
7
microservices
API Endpoints18 routes
GET/api/productsList products
POST/api/ordersCreate order
PUT/api/inventory/:idUpdate stock
DELETE/api/cart/:idRemove item
PATCH/api/users/:idUpdate profile
Functional Requirements
User authentication with OAuth2 and JWT
Product catalog with search and filtering
Shopping cart with session persistence
Order management and status tracking
Real-time inventory sync across warehouses
Payment gateway integration (Stripe)

Ready to design faster?

One sentence. Full system blueprint. No setup required.

Start Generating →