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.

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Book consultation
50M+
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 Community CLI
Command line tools to help you build React Native apps
10297742
2891
Infrastructure
React Native Testing Library
Simple and complete React Native testing utilities that encourage good testing practices
9460312
3373
Testing
React Native Pager View
React Native wrapper for the Android ViewPager and iOS UIPageViewController
4723460
3312
UI
React Native Slider
React Native component exposing Slider from iOS and SeekBar from Android
3745223
1419
UI
React Native Paper
Material Design for React Native (Android & iOS)
1661612
14376
UI
React Native Builder Bob
Simple set of CLIs to scaffold and build React Native libraries for different targets
1525894
3213
Infrastructure
Reassure
Performance testing companion for React and React Native
1076806
1438
Testing
Rozenite
Plug-and-play panels for React Native DevTools. Install, enable, and start debugging in minutes.
665223
597
Testing
React Native Bottom Tabs
Native Bottom Tabs for React Native
324677
1400
UI
React Navigation
Routing and navigation for your React Native apps
226436
24462
UI
Agent Device
CLI to control iOS and Android devices for AI agents
188238
2255
Agents
Liquid Glass
iOS Liquid Glass in React Native
157692
1434
UI
Agentic Delivery

Turn AI into better software delivery.

From redesigning development workflows to building custom agents, testing their output, and choosing the right models, we turn AI into a practical part of product delivery.

Agentic Delivery
Book consultation
AI SDLC Advisory
AI-Driven QA & Testing
Custom Agents
Custom & Private Models
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
Insight Page
Talk
New York, United States

Efficient On-Device LLMs in React Native Done Right

Artur Morys-Magiera will cover efficient on-device LLMs in React Native, including runtimes, model selection, quantization, and platform constraints.
Insight Page
Talk
New York, United States

On-Device AI After WWDC: What Changed for React Native

Mike Grabowski will explain what changed for system-provided on-device AI after WWDC and what React Native developers can build with it.
Insight Page
Talk
New York, United States

Beyond Coding Agents: Making ADLC Work Across Platforms

Mike Grabowski will explain how to close the full agentic development lifecycle across mobile, web, and native platforms.
Insight Page
Talk
Berlin, Germany

React Native Brownfield Deep Dive: How RN Moves Into Native Applications

Artur Morys-Magiera will explain how React Native can move into an existing native app without forcing a big-bang rewrite.
Insight Page
Talk
Paris, France

Building a Modern Navigation Library: The Hard Parts

Satyajit Sahoo will share the decisions and trade-offs behind React Navigation 8 and building a modern cross-platform navigation library.
Image

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
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discord

Talk agents, apps, and open source.

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

Join Callstack Discord