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
React Native Harness
Harness brings Jest-style tests to real native environments so you can test TurboModules like you would test your React Native app: with JavaScript.
136602
298
Testing
Re.Pack
Webpack-based toolkit to build your React Native application with full support of webpack.
111317
1902
Infrastructure
React Native Legal
Automagically generate license acknowledgements for your React Native app & any JS project
49476
349
Infrastructure
Rock
Modular toolkit for teams building React Native apps
40119
688
Infrastructure
React Native AI
On-device LLM execution in React Native with Vercel AI SDK compatibility
22123
1313
Agents
Voltra
Voltra lets React Native developers build native iOS Live Activities, Dynamic Island layouts, and widgets as React components without writing Swift. It supports hot reload, push updates, and includes a config plugin that wires everything automatically.
15022
720
UI
Skill Gym
Tool for testing and benchmarking agent skills. Run real agent and catch skill regressions before ship.
1500
56
Agents
React Native Sandbox
Run multiple, isolated React Native instances within a single application
506
211
Infrastructure
React Native Brownfield
Incrementally move your iOS and Android apps to React Native without breaking.
516
Infrastructure
Linaria
Zero-runtime CSS in JS library
Infrastructure
React Native Evals
Open-source benchmark for measuring how AI coding models perform on real React Native tasks
91
Testing
React Native Vision OS
A framework for building native visionOS applications using React Native
UI
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.