React Foundation
used by 45m+ developers
100+ Enterprise Clients
One partner for the AI-native shift.
Most companies piece this together from separate vendors. We do all of it: build products with agents, make delivery reliable, get your team working AI-native, and keep it under control at scale.
AI-native delivery starts here. Pick where to start.
Agentic delivery, led by Core Contributors
The fastest way to ship React Native products
For over a decade, we've delivered React Native for teams with demanding production requirements. Today, we pair that expertise with custom AI Agents, so you ship more.
There is a 6x productivity gap between AI power users and everyone else.
OpenAI
We had been struggling with React Native application performance until we met Callstack.
Turn AI output into faster product delivery
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.
As AI increases code output, testing and review are becoming the primary bottlenecks in delivery.
GitLab
Their engineers proved to be a crucial part of our mobile app relaunch project.
Make AI an advantage, not a subscription
Build an AI-native engineering team
Stop guessing the ROI of your AI tools. We configure the right stack, train your team to use it effectively, and measure the direct impact on delivery.
Over 80% of companies report no productivity gains from AI so far despite billions in investment
National Bureau of Economic Research
The trainers are always very helpful and supportive. It really makes a difference!
AI has to pass more than code review.
Adopt AI under enterprise constraints.
AI gets harder to use when security, compliance, and data handling requirements shape the path to production. Enterprise teams need a setup that fits those conditions.
80% of executives say their companies would likely fail an AI governance audit.
Grant Thornton
I recommend them as a trusted tech partner for running complex projects.
WHY CALLSTACK
AI is transforming React Native development. Work with the experts building the tools behind it.
Part of the React Foundation
The world's most popular frameworks for AI-native apps are React and React Native. We're part of the team building them.
Used by developers and agents worldwide
We build open-source solutions for React Native and infrastructure that helps developers and AI agents inspect, control, and improve mobile applications.
Trusted at enterprise scale
We have spent 10+ years helping large organizations ship, modernize, and scale complex cross-platform products.
Case studies
What shipping at AI speed looks like
Trusted by enterprise teams at scale
Not only does Callstack have tremendously talented engineers, but I know they care about the success of the project as much as I do.
Teamworks needed Module Federation, we helped make it real
I appreciate their attention to detail, flexible approach and a high degree of expertise.
I recommend them as a trusted tech partner for running complex projects.
The trainers are always very helpful and supportive. It really makes a difference!
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We had been struggling with React Native application performance until we met Callstack.
Their engineers proved to be a crucial part of our mobile app relaunch project.
Worth your time, by engineers.
React Native Wrapped 2025: A Month-by-Month Recap of The Year
The first edition of React Native Wrapped looks back at the year RN turned 10 and the ecosystem doubled down on the New Architecture. It provides a month-by-month record of 2025, covering major framework releases, the Legacy Architecture freeze, React 19 integration, and notable developments across tooling, performance, styling, native modules, Expo, and platform adoption.
Agent Conf
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VisionCamera V5 With Marc Rousavy
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Behavior Review for AI-Native Delivery
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Automating Mobile QA With Cloud Agents
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