One Language forAI-Native Full-StackDevelopment
Build complete applications with backend + frontend + AI in a single unified language. Access both PyPI and npm ecosystems, deploy from laptop to cloud with zero code changes.
Backed by Industry Leaders

Part of Nvidia Inception Program, supporting cutting edge AI innovation and scalability

Research led by faculty and researchers at University of Michigan, United States

Sponsored by NSF, advancing community driven open source ecosystem
Jac Supersets Python & JavaScript
One language with full access to both PyPI and npm ecosystems

Use Any Python Library (PyPI)
Use Any npm Package (React, MUI, etc.)
Full-Stack in One Language: Backend + Frontend + AI
Use any Python library for backend logic and any npm package for UI components. Build complete applications with AI capabilities, automatic scaling, and zero context switching.
Full-Stack Applications in One Language
Build complete web applications with backend, frontend, and AI - all in Jac. No more context switching between languages.
Full-Stack Todo App (One File)
What You Get
- React components written in Jac syntax
- Automatic state management (has → useState)
- Direct walker invocation (no HTTP boilerplate)
- Type safety across frontend and backend
- Hot module replacement for fast development
- Full npm ecosystem access (MUI, Tailwind, etc.)
Write Once
Backend logic, frontend UI, and AI - all in one .jac file
Run Locally
jac start app.jac - instant dev server
Deploy to Production
jac start app.jac --scale - same code, infinite scale
Zero to Infinite Scale Without Code Changes
Deploy the same code locally or to Kubernetes production. No Docker, no manifests, no configuration.
What Gets Created Automatically
With load balancing & health checks
For caching & session management
For persistent data storage
Secure configuration management
Data survives restarts
Kubernetes Orchestration
Auto-scaling deployments, health checks, and service discovery
Persistent Storage
MongoDB for data, Redis for caching - auto-provisioned
Built-in Auth
JWT authentication and SSO support out of the box
Auto API Docs
Swagger/OpenAPI documentation generated automatically
Zero DevOps Required. No Dockerfile, no Kubernetes manifests, no infrastructure setup. The same code that runs on your laptop scales to production with a single flag.
AI Native Programming Language
Meaning Typed Programming with byLLM and agentic Object-Spatial Programming
Jac introduces Meaning Typed Programming - replace function bodies with AI. The function signature IS the specification. No complex prompts needed, just declare what you want.
Jac Programming
Traditional Programming
The Jaseci Stack
Everything you need to build AI-native full-stack applications
Jac Lang
The core language that supersets Python and JavaScript. Build AI systems with graph-based Object-Spatial Programming.
jac-client
Build full-stack web applications entirely in Jac. React components, state management, and backend APIs in one file.
jac-scale
Zero to infinite scale without code changes. Deploy to Kubernetes with auto-provisioned databases and authentication.
Why Jaseci
Modern software needs AI, full-stack capabilities, and seamless scaling. Jaseci delivers all three in one unified stack.
One Language, Full Stack
Write backend APIs, React frontends, and AI integrations in a single language. No more context switching between Python, JavaScript, and prompt engineering.
PyPI + npm in One Language
Access the entire Python ecosystem for backend logic and the full npm ecosystem for UI components. Use numpy, pandas, React, MUI - all in Jac.
AI Without Prompt Engineering
Replace function bodies with AI using Meaning Typed Programming. The function signature IS the specification - no complex prompts needed.
Zero to Infinite Scale
Deploy locally with one command, scale to Kubernetes production with the same code. Auto-provisioned databases, authentication, and API documentation.
