Private beta
Whale Loop
An execution harness that keeps AI coding agents on the goal, and lets them call work done only after a real check passes.
Ask for early access
LoopRain's first game · First beta now playing
AntWave: Tiny Rebellion
Colony tactics. A tiny rebellion against the giants of the forest. Nothing to install: play on the web, on a phone held sideways or on a PC.
Our flagship game
A tiny ant army, giant bosses
Send a squad with a single card and take down the forest's bosses one by one. One quick stage, or all the way to the end of the forest.
- stages
- 25
- regions
- 11
- bosses
- 11
- play with no install
- Web
- 01
Deploy with a card
Drag a card onto the field and a squad heads out. At a worksite they build, by the cargo they push, by the boss they bite. Where you drop it decides the job.
- 02
Every boss fights differently
The spider queen's silk, the mantis's double strike, the lion's roar. Each boss has its own named attacks and tells to read and dodge.
- 03
Play anywhere, right away
Start in the browser with nothing to install. It runs on phones held sideways and on PCs, and keeps going offline once added to your home screen.
11 bosses to beat
01Spider
02Spider Queen
03Mantis
04Dragonfly
05Frog
06Snake
07Owl
08Fox
09Eagle
10Wolf
11Lion
Company
We make things that see it through.
Games people want to play to the end, and AI agents that see work through to the end. LoopRain is an early-stage startup, started by one person in May 2026.
What we do
How we work
- 01Make
- 02Ship
- 03Learn
Make it, ship it, carry what we learn into the next version, and repeat steadily like rain. That is what the name means.
AI agents · In development
Whale Loop: AI development that finishes
Instead of stacking another decision engine on top of the model, Whale Loop lets today's model own the work from exploration to verification, and holds the boundaries firm.
In development
Whale Loop Desktop
Plan, approve, build, and verify with your coding agents in one desktop app, on the Codex, Claude Code, Cursor, and Grok setups you already have.
Ask for early access- 01
Keeps the goal in sight
Even in long tasks, it checks the current state against the original goal and makes the biggest gap the next move.
- 02
Agrees on a design first
Vague requests start by reading the codebase, become a decision-complete design, and get built only once approved.
- 03
Done means proven
Not the model saying "done", but a real check run after the last change is what counts as finished.
- 04
Stops and asks at the edges
Out-of-scope changes, external writes, and human decisions are surfaced, not hidden. Existing changes are preserved.
Works with
- Codex
- Claude Code
- Grok
- Cursor
- OpenCode
- Antigravity
History
Starting small, shipping one thing at a time.
LoopRain founded
Started as a one-person startup making games and AI agents.
Whale Loop harness in development
An execution harness that has AI coding agents prove completion with real checks.
OngoingWhale Loop Desktop in development
A desktop app for working with agents from plan to verification.
OngoingAntWave first beta
Opened the first beta of AntWave, our first game, on the web.
Ongoing
Contact
AntWave beta feedback, early access to Whale Loop, or collaboration ideas: send it all by email.