Agentic Infrastructure

Self-Hosted CI/CD Infrastructure

Self-Hosted CI/CD Infrastructure

Run delivery infrastructure on your terms.

Hosted delivery infrastructure does not fit every cost, security, or control requirement. Our self-hosted CI/CD, OTA, and agent execution infrastructure lets teams run delivery on their own terms and keep more of the stack under their control.

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Self-Hosted CI/CD Infrastructure

Why self-host with Callstack

Control the stack behind delivery.

We move CI/CD, OTA, release monitoring, and agent execution into infrastructure your team can own. Delivery gets faster while cost, security, and control stay easier to govern.

Reach market faster.

Build, test, and rollout automation shortens the path from code to release.

Catch delivery issues earlier.

Monitoring and health signals make release problems visible before they affect users.

Lower the cost of running delivery.

A self-hosted, agentic setup reduces platform dependency and keeps maintenance manageable.

Services

Run delivery on infrastructure you control.

Use Cases

Release Automation

Automate build, signing, testing, and rollout steps so releases need less manual coordination.

CI/CD Modernization

Replace brittle pipelines with faster, more observable workflows built for current delivery demands.

Build & Test Acceleration

Shorten feedback loops with better caching, parallelization, and runners tuned to your workloads.

OTA Rollout Management

Ship changes and bug fixes between App Store releases through over-the-air updates.

Release Monitoring & Observability

Monitor releases and trigger alerts when rollout, build, or post-release signals show risk.

Deployment Health Visibility

Give teams a live view of pipeline status, release progress, and post-release health across environments.

Delivery Cost Optimization

Reduce spend on hosted runners, device clouds, and release tooling by moving the right parts of the stack in-house.

Self-Hosted CI/CD Infrastructure

Move delivery infrastructure in-house.

Send us your current CI/CD, observability, and release stack. We'll come back with a migration plan to build tooling on your own infrastructure.

Book a call

Design → Build → Extend

Build delivery infrastructure your team owns.

Design

We map the mobile delivery stack, controls, and cost. You get the plan before migration starts.

See hosted vs self-hosted economics
Find the gaps in the delivery stack
1 WEEK

Build

We deploy QA, CI/CD, OTA, and telemetry. The mobile delivery stack runs in your environment from day one.

QA agent, OTA, and CI/CD included
Telemetry and release signals included
2-4 WEEKS

Extend

Your team owns the stack long term. We stay on to extend it as delivery needs grow.

Extend the stack beyond the first rollout
Add new agents as needs change
AS NEEDED

Manifesto

When the way software is built changes, 
we help companies adopt it.

AI-native teams run on a system, not only on tools. Agents move the work forward. Experts make the calls that shape the outcome.

Learn Callstack Delivery Model

Case studies

What shipping at AI speed looks like

Case Study Cover
End-to-End Product Development
Self-Hosted CI/CD Infrastructure

Accelerating Teamworks' Mobile Delivery With Re.Pack and Module Federation

10

min change lead time for mini-app delivery

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AI-Assisted Migrations
Self-Hosted CI/CD Infrastructure

Migrating a Legacy React Native App to Expo for Faster Builds and Simplified Releases

6x

faster builds after replacing Jenkins with EAS

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Self-Hosted CI/CD Infrastructure
Architecture & Performance

Building Scalable Observability for a High-Growth React Native App

3→1

analytics systems unified into a single interface

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AI-Assisted Migrations
End-to-End Product Development
Self-Hosted CI/CD Infrastructure

Migrating iOS and Android Apps to React Native for AutoZone

2x

growth in mobile user base during the migration period

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End-to-End Product Development
Self-Hosted CI/CD Infrastructure
Architecture & Performance

Launching a High-Performance React Native App on Samsung TV

5

platforms under one RN codebase: tvOS, FireTV, Tizen, LG, Vizio

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Architecture & Performance
AI-Driven QA & Testing
Self-Hosted CI/CD Infrastructure

Enhancing Application's Performance for Expensify

5x

faster message sending time

10 years of React Native → Now in your AI stack

Move delivery infrastructure in-house.

Send us your current CI/CD, observability, and release stack. We'll come back with a migration plan to build tooling on your own infrastructure.

Book a call

Why teams bet on Callstack

From billion-user apps to React Native core, this is why teams choose Callstack when they need to move fast and get it right.

Rocket ascending into a blue night sky with digital binary code forming its smoke trail.

10 years in React Native. Now shaping agentic engineering.

For a decade, we have helped define how teams ship with React Native. Now we are helping shape how they work with agents.

Founded in 2016 ·Backed by Viking Global Investors

React Foundation members. Core Contributors.

We are founding members of React Foundation and Core Contributors to React Native. You get direct access to people close to the decisions shaping the frameworks you use.

Open source since 2016. Our code runs in your app.

We contribute to React Native and maintain libraries across its ecosystem. Our code runs in apps used by millions of people every day.

Open Source Projects

39M+

Downloads / month

67K+

GitHub stars

300+

React Native commits

100+ Enterprise clients with 7B+ users.

We work with teams shipping at real scale. You get a partner used to high-stakes products, not learning on your roadmap.

Agent Conf. The conference for the Agentic era.

The conference we built for the shift from writing code to orchestrating agents.

Agent Conf
Gradient background blending white, light blue, and purple shades with smooth transitions.Man wearing glasses and a Stanford sweatshirt speaking into a microphone during a presentation.

We are Codex Ambassadors.

We run meetups, workshops, and hands-on 
sessions that help teams learn Codex 
and apply it in real work.

Check Events
Rocket ascending into a blue night sky with digital binary code forming its smoke trail.

10 years in React Native. Now shaping agentic engineering.

For a decade, we have helped define how teams ship with React Native. Now we are helping shape how they work with agents.

Founded in 2016 ·Backed by Viking Global Investors

React Foundation members. Core Contributors.

We are founding members of React Foundation and Core Contributors to React Native. You get direct access to people close to the decisions shaping the frameworks you use.

Open source since 2016. Our code runs in your app.

We contribute to React Native and maintain libraries across its ecosystem. Our code runs in apps used by millions of people every day.

Open Source Projects

39M+

Downloads / month

67K+

GitHub stars

300+

React Native commits

100+ Enterprise clients with 7B+ users.

We work with teams shipping at real scale. You get a partner used to high-stakes products, not learning on your roadmap.

Agent Conf. The conference for the Agentic era.

The conference we built for the shift from writing code to orchestrating agents.

Agent Conf
Gradient background blending white, light blue, and purple shades with smooth transitions.Man wearing glasses and a Stanford sweatshirt speaking into a microphone during a presentation.

We are Codex Ambassadors.

We run meetups, workshops, and hands-on 
sessions that help teams learn Codex 
and apply it in real work.

Check Events

Open Source

Want to build it on your own?

We open-source the tools behind our delivery model.
Use them, fork them, or let us run them for you.

Check All Tools
Explore AI Infrastructure
React Native Community CLI

Command line tools to help you build React Native apps

10297742
downloads / month
Re.Pack

A webpack-based toolkit to build your React Native application with full support of webpack ecosystem

111317
downloads / month
React Native Builder Bob

Simple set of CLIs to scaffold and build React Native libraries for different targets

1525894
downloads / month
Rock

Modular toolkit for teams building React Native apps

688
stars
Agent Skills

Callstack’s best practices on React Native performance optimization, upgrading, CI workflows, and brownfield migrations

1374
stars

Insights

Worth your time, by engineers.

Explore Insights
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May 18
·
Article

Unlocking Expo Updates in an Isolated Brownfield Architecture with SDK 55

Expo Updates used to be a pain point for teams running an Isolated Brownfield architecture. This guide shows how to get it working with Expo SDK 55, including iOS packaging, the current Android workaround, and end-to-end OTA update testing. If you're shipping React Native inside an existing native app, this walkthrough helps you get setup faster without guessing through the hard parts.
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Nov 20
·
Article

How to Release a React Native App on the Meta Horizon Store

This article walks through the full release flow for React Native apps on Meta Quest, from preparing a production build to submitting it through the Horizon Store. Developers will learn the technical steps, required tools, and best practices for store‑ready assets. It also highlights common review pitfalls, guidance for creating high‑quality screenshots, monetization options, and tips for shaping a smooth submission workflow. By the end, readers will understand how to take a Quest app from development to a polished, store‑ready release.
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Aug 27
·
Article

Re.Pack 5.2: Faster Babel Transforms, RN 0.80 & 0.81, Rozenite

Re.Pack 5.2 is out! This release focuses on parallel, smarter transforms with a new Babel & SWC loader, official support for React Native 0.80 and 0.81, fully typed configs, support for Rozenite and more.
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Jun 19
·
Article

Caching React Native Builds on S3 and R2 With Rock

One of the core reasons we built Rock was to eliminate unnecessary native iOS and Android builds by reusing existing artifacts: saving time, compute, and cost. Until now, remote caching was tied to GitHub, which limited flexibility. The latest release changes that: Rock now supports AWS S3 and Cloudflare R2, allowing teams to store and retrieve native builds from their own infrastructure. This unlocks a much more powerful setup for enterprise teams with custom CI or compliance needs.
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Mar 14
·
Article

We’re Building a New React Native Framework

Building large React Native apps can be challenging, with slow build times, complex integrations, and mixed tech stacks. We're developing a new framework designed for enterprise apps that optimizes build reuse, CI speed, and cloud integration while staying flexible and self-hosted.
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May 10
·
Article

Shipping Fast With Continuous Deployment

Continuous Deployment (CD) lets you automate the critical steps of building, testing, and releasing your mobile apps. This guide walks through setting up CD pipelines with fastlane and AppCenter to ship new features and fixes faster without the manual toil.
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May 14
·
Article

Ship OTA (Over-The-Air) When in an Emergency

Shipping critical updates to mobile apps can be painfully slow, but React Native's over-the-air (OTA) updates let you push fixes directly to users in minutes. We walk through how to set up OTA updates with App Center/CodePush or EAS Update to deploy changes instantly when you need them most.
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Aug 4
·
Article

Mastering Fastlane: Overcoming Challenges in Passing Build Properties to Native Layers

Fastlane is a powerful tool for automating development tasks, but it has some nuances. This guide shares practical tips for reliably updating plist files in iOS projects and passing custom properties to Gradle builds in Android apps.
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Dec 13
·
Article

How Can Continuous Integration (CI) Improve Your React Native Apps?

Continuous Integration (CI) can help React Native teams ship faster and with more confidence. By automating builds and tests, CI provides quick feedback on code changes, catches regressions early, and reduces manual testing effort. This article explores how to set up CI for React Native apps using popular tools like CircleCI and EAS Build.
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Apr 24
·
Article

Continuous Delivery - Integration for Everyone

Continuous integration and delivery can be tricky to set up, especially for mobile apps. This guide walks through a real-world example of configuring CircleCI, Fastlane, and App Center to automate builds, tests, code quality checks, and beta distribution for a React Native app.
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Apr 12
·
Article

Bob - The React Native Library Builder

Bob is a new tool that aims to simplify and standardize the process of building and publishing React Native libraries. It handles compiling JavaScript and TypeScript code for different targets, generating type definitions, and more - so you can focus on writing your library code.
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Aug 13
·
Podcast

Observability and OpenTelemetry in React Native

Learn how Embrace and OpenTelemetry can help React Native teams standardize observability and improve app monitoring across platforms.
Jun 10
·
Podcast

Build Faster and Scale Smarter With Rock

Discover how Rock cuts build times, streamlines CI, and simplifies large-scale app development for growing teams.
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Oct 29
·
Podcast

How to Handle App Center Retirement

Discover App Center alternatives for React Native. Explore migration tips and Expo's role in the transition from CodePush & other App Center functionalities.
No items found.
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September 13, 2025
·
Event

Native Apps Without a Build Step

Discover Rock by Callstack: the open, modular, self-hosted framework for React Native. Built to help teams scale, migrate, and deliver faster in the evolving React Native ecosystem.
June 24, 2025
·
Event

Observability for Application Deployments

Discover practical observability techniques to pinpoint and fix slow deployments, optimize global performance, and deliver faster apps.
June 24, 2025
·
Event

Elevate Your React Native Observability With OpenTelemetry

Learn how to leverage OpenTelemetry to gain deeper, real-time insights into your React Native apps and significantly improve user experience.
June 17, 2025
·
Event

Live Dev Session: React Native Styling, OTA, and UI Tools

Tune in to a live session unpacking React Native 0.80, OTA alternatives, AI-generated UIs, styling wars, and some truly wild tech tangents.
April 24, 2025
·
Event

Native Apps Without a Build Step

Learn how Callstack’s new React Native framework slashes CI times and simplifies enterprise-scale mobile development.
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May 12, 2025
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Webinar

From Hours to Minutes: Making Your React Native CI Builds 20x Faster

Discover how to skip 90% of native builds in React Native CI using Rock. Includes a live demo and cost-saving insights from Expensify’s setup.
March 27, 2025
·
Webinar

Why You Need Rock

Learn more about Callstack's Rock straight from its creators.
July 19, 2024
·
Event

Unlocking Hidden Data: RUM for Effective App Optimization and Decision Making

Explore how RUM data reveals user behavior, solves app mysteries, and boosts conversions with smart metrics for better product decisions.
March 4, 2025
·
Event

New React Native Framework for Enterprise Announcement

We know what it takes to make React Native work for serious-scale applications. That’s why we created Rock, so enterprise teams can build with confidence, efficiency, and full control over their stack.