SYS://JASECI
One ecosystem forAI-native software.
Jaseci is the home of Jac: a full-stack programming language with AI built in, a hackathon series where its community ships, and a home where your creations are hosted and scaled.
01 / jaclang.org
One language.
One compiler.The whole stack.
Jac builds AI, graphs, persistence, APIs, UIs, and cloud deployment directly into the language, as a native superset of Python with the PyPI and npm ecosystems at your fingertips.
AI as a language feature
Hand any function to an LLM with a single keyword: by llm. No prompt plumbing, no SDK ceremony.
Object-Spatial Programming
Nodes, edges, and walkers make graphs and the computation that moves over them first-class citizens.
The whole stack, one program
Backend, frontend, persistence, and APIs come out of one codebase. The compiler does the gluing.
Laptop to cloud, zero rewrites
The same program runs as a script, a service, or a Kubernetes deployment. Scale is a flag, not a refactor.
import from mtllm { Model }
glob llm = Model(model_name="gpt-5");
"Rank posts by what this user will love."
def rank(posts: list[Post]) -> list[Post] by llm();
node Post { has text: str; }
walker feed {
can serve with `root entry {
report rank([-->(`?Post)]);
}
}
$ jac start feed.jac # API, persistence, and AI. Served.
$ jachacks --list
San Francisco, CA
A one-day build sprint for the Bay Area's builders.
Ann Arbor, MI
Where the series was born, on campus at Michigan.
Anywhere on Earth
Global online rounds. All you need is a laptop.
> register at jachacks.org
02 / jachacks.org
Where the Jac
community ships.
JacHacks is the hackathon series powering the future of AI programming. Form a team, learn the stack in a morning, and demo a working AI-native app by night. In person and online, from San Francisco to Ann Arbor to wherever you are.
- >Build with Jac and the full Jaseci stack
- >Mentors, workshops, and starter kits included
- >Prizes, swag, and a fast track into the community
03 / jachammer.ai
A home for yourJac creations.
JacHammer is where your Jac projects live. Host and deploy your creations at scale, share them with a link, and take an idea from prototype to production without ever moving it.
Deploy with a click
Go from working code to a live, hosted app in seconds. Every project gets its own shareable URL.
Scale built in
Hosted on the Jaseci stack, your app grows from weekend demo to production traffic without a rewrite.
Build in your browser
A full web IDE is included. Edit, live-preview, and iterate on your projects without installing a thing.
Every version kept
Project history lives with the project. Roll back, branch, and compare releases without leaving the page.
my projects
+ newall systems live · scaling on demand
community
Hear what builders and thecommunity think about Jac.
Enterprise teams shipping to production, startup founders building on the stack, and first-time Jac developers at JacHacks — in their own words.
swipe to explore
Start anywhere. It all runs on Jaseci.
Learn the language, join a hackathon, or give your next creation a home.