Named one of YC Demo Day's standout startups 
Run gstack in the cloud. With your team.
The full gstack workflow — Think, Plan, Build, Review, QA, Ship — running on your real codebase in the cloud. No local setup. Team collaboration built in. Start in 60 seconds.
No credit card required
A complete dev workflow, built by Garry Tan.
gstack is an open-source Claude Code system that models a full software sprint: rethink the product like a CEO, plan the architecture like an engineer, build with AI agents, review with a designer's eye, QA in a real browser, and ship with confidence.
Cloud-native execution
No local Claude Code setup, no API keys to manage, no compute constraints. Agents run in isolated cloud environments on your real codebase.
Built for teams
gstack locally is single-player. On Lightsprint, your whole team runs the same workflow together, at every step.
Your code stays yours
Install the Lightsprint GitHub app. Your code stays in your repo; agents run in isolated environments and push through your existing Git provider.
Five reviews. One plan.
Every change passes through specialized review agents before it ships, so the plan is bulletproof by the time anyone writes code.
Office Hours
Pressure-test the idea before a plan exists. Sharp questions on evidence, user pain, and existing work.
Plan
Architect the change like a senior engineer — grounded in your real codebase and conventions.
Build
Cloud agents implement the plan in parallel, in isolated environments, on your repo.
Review
A designer-eyed review pass catches UX and polish issues before they reach a human.
QA
The change is exercised in a real browser on a live preview URL, like a real user.
Ship
A clean pull request lands in your Git provider for your engineers to review and merge.
Garry Tan shipped 10,000 lines of code and 100 pull requests per week over 50 days using gstack. Now your team can run the same workflow, together, in the cloud.
Lightsprint is backed by Y Combinator
Your team's gstack is ready.
Connect your repo. Run Think, Plan, Build, Review, QA, Ship. Collaborate with your team at every step.
No credit card required