OPEN SOURCE

Built for teams and agents to ship faster

From core libraries to AI agent infrastructure, our open source work helps teams build better apps and gives agents the tools they need to work inside your codebase.

39M+
Downloads / month
300+
React Native commits
67K+
GitHub stars
150+
OSS Projects
Used across production apps
Teams use our libraries every month to build, test, release, and improve React Native products at real high-trafficproduction scale.
Part of the React Foundation
We help shape the framework your mobile products depend on. Our open source sits close to the decisions behind React Native.
Maintained with the community
These projects grow through real usage, contributor feedback, and engineers who ship production React Native apps every day.
The stack for AI-native delivery
From core libraries to agent infrastructure, our projects give teams and agents the tools to work inside real codebases.
Open source

Tools for teams and agents.

From core React Native libraries to agent infrastructure, these projects help engineers and AI agents inspect, validate, automate, and ship real apps.
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Project
Function
Downloads/mo
Stars
Agent React DevTools
Give your AI agent eyes into your React app. Inspect component trees, read props and state.
222
Agents
Agent Skills
Callstack’s best practices on React Native performance optimization, upgrading, and CI workflows.
1374
Agents
Agentic Infrastructure

Infrastructure built for AI-native delivery

Agentic development only works when the infrastructure around it can keep up. The right delivery stack turns more agent output into faster engineering and smoother releases.

AI-Driven QA & Testing
Custom Agents
Self-Hosted CI/CD Infrastructure
Events

Meet the engineers behind the work.

Join talks, workshops, and live sessions from the people building React Native, open source tools, and AI-native delivery workflows.
Explore Events

Agent Conf

warsaw / Poland

17–18/09/2026

Cross the threshold into agentic development.

Two days in Warsaw with the engineers designing, debugging, orchestrating, and adopting agents in real software teams.

Buy ticket
discord

Talk agents, apps, and open source.

Join the Callstack Discord to discuss React Native, AI-native workflows, agent tooling, bugs, ideas, and contributions.