CodeYam is a simulation-based tool that helps developers understand, test, and trust code changes so they can ship confidently.
CodeYam is a simulation-based tool that helps developers understand, test, and trust code changes so they can ship confidently.


What are simulations?What are simulations?
Simulations preview each change across different states and data scenarios, helping you understand exactly what changed in your app and confirm it matches your intention.

What are simulations?

A new way of exploring your productA new way of exploring your product
CodeYam breaks down your app so you can explore, isolate, share & discuss specific parts of it with your team.

A new way of exploring your product
CodeYam breaks down your app so you can explore, isolate, share & discuss specific parts of it with your team.

Built for developers working with agentic toolsBuilt for developers working with agentic tools
CodeYam helps you navigate complexity at the speed that code is being created, by providing you with:
Built for developers working with agentic toolsBuilt for developers working with agentic tools
CodeYam helps you navigate complexity at the speed that code is being created, by providing you with:
โ Install the GitHub app or CLI tool.
๐ CodeYam detects code changes (pre-commit for CLI, post-commit for GitHub).
๐งช We run your app through real flows using semantially-aware AI-generated mock data.
๐ You see the output: visual simulations, logs, and summaries of behavior.
๐ก Merge with confidence or catch bugs early.
watch how your product responds to change
watch how your product responds to change
watch demo
Our team has built products with new technologies at companies like Pivotal Labs, Lyft, Meta, and various startups. We've seen how development tooling needs to evolve as codebases and teams grow.
ย
AI coding assistance is powerful but creates new challenges around code comprehension and change validation. CodeYam addresses this specific gap in the development workflow.
Backed By:
...and more.
Our team has built products with new technologies at companies like Pivotal Labs, Lyft, Meta, and various startups. We've seen how development tooling needs to evolve as codebases and teams grow.
AI coding assistance is powerful but creates new challenges around code comprehension and change validation. CodeYam addresses this specific gap in the development workflow.
Backed By:
...and more.
Our team has built products with new technologies at companies like Pivotal Labs, Lyft, Meta, and various startups. We've seen how development tooling needs to evolve as codebases and teams grow.
ย
AI coding assistance is powerful but creates new challenges around code comprehension and change validation. CodeYam addresses this specific gap in the development workflow.
Backed By:
...and more.
We support TypeScript, React, Next.js, Remix (more soon)
Integration: GitHub App (post-commit), CLI tool (pre-commit, coming soon)
Security: Simulations run in isolated environments
We support:
TypeScript, React, Next.js, Remix (more soon)
Integration:
GitHub App (post-commit)
CLI tool (pre-commit, coming soon)
Security:
Simulations run in isolated environments