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.

Generate →

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 →