Ori is a statically-typed language where functional code compiles to imperative speed
The Memory Model Nobody Else Has
No garbage collector. No borrow checker. No manual allocation. Eight stacked optimizations turn functional code into in-place mutations — zero compromise between safety and speed.
Effects You Can See
Side effects are explicit. Every function declares its capabilities. Mocking is built-in — just provide a different implementation with `with...in`. No frameworks. No DI containers.
The Design That Compounds
Value semantics enables safe memory, which enables complete effects, which enables trivial mocking, which makes testing painless. One decision, compounding returns.
Smart Testing
Tests live in the dependency graph. Change a function, and every affected test runs automatically. Your tests even make your binary faster — they're automatic profiling data for the optimizer.
The Design That Compounds
Not independent features bolted together — one design choice with compounding returns.
Value Semantics
Every variable owns its data. No shared mutation. No aliasing.
Safe Memory
No aliasing lets ARC optimize: in-place reuse, borrow inference, copy-on-write — all automatic.
Complete Effects
No hidden mutation means capabilities see every side effect. Nothing escapes.
Trivial Mocking
Capabilities are injectable. Replace any effect with `with...in`. No frameworks needed.
Safe Refactoring
Smart testing + dependency tracking = change with confidence. Tests that know your code.
Get Started
1 Install
curl -fsSL https://ori-lang.com/install.sh | sh2 Write your first program
// hello.ori
@main () -> void = {
print(msg: "Hello, World!");
}3 Run it
ori run hello.oriOther projects
Built by the same team behind Ori Lang
Upstat
Incident response & operational intelligence for DevOps and SREs.
upstat.ioOriJs
NestJS-inspired backend framework for Bun. Provider-based DI, no decorators.
orijs.orgOri Term
GPU-accelerated terminal OS. Emulation, multiplexing, and sessions unified.
oriterm.comCloudLayer
Document conversion API — HTML/URL to PDF, PNG, WEBP.
cloudlayer.ioWarpKit
Svelte 5 SPA framework with state-based routing and pluggable providers.
warpkit.org