React Native Community CLI
Command line tools to help you build React Native apps
13.5M downloads/mo
ISO 27001 certified
100+
Enterprise projects delivered
React Foundation
Founding Member
300+ commits to React Native
Industry runs on our tooling
50M+
OSS downloads / month
10 min
From code change
to mini-app release
60 → 10min
Faster builds after replacing Jenkins with EAS
What you get
Own the pipeline from build to rollback.
Continuous Delivery infra
Scalable pipelines for rollouts, feature flags, A/B tests, and store submissions. Safer, faster delivery.
Faster iOS and Android builds
Remote caching and reusable artifacts cut Expensify builds from 25 min to 90 s, with faster feedback on both platforms.
Self-hosted OTAs
Over-the-air updates with staged rollouts, rollback, and secure delivery. No third-party update provider.
Faster testing cycles
Reusable native build artifacts shared across CI jobs cut test time and lift throughput for QA teams.
No vendor lock-in
Everything runs on your infrastructure. Full control over build, release, and recovery, no third parties.
Open source at the core
Built on Rock, our open-source framework: a drop-in replacement for the Community CLI your team can audit and extend.
How we work together
Improve the system without disrupting delivery.
Extend your team
Our senior engineers join your team to ship features, guide technical decisions, and strengthen delivery.
- Your roadmap and workflow
- Expertise shared as we work
- Flexible timezone coverage
Deliver a project
We take agreed work from technical planning to release, with clear responsibilities and progress you can see.
- 3 Callstack engineers ship like 6
- Impact visible before sprint two
- End-to-end delivery
Solve specific challenge
We address a performance, migration, or infrastructure challenge, or run training around your team’s needs.
- Focused reviews or implementation
- Knowledge your team keeps
- Outcomes guaranteed with contract
Case studies
What shipping at AI speed looks like.
- 10
- min from code change to mini-app release
- 2x
- growth in mobile user base during the migration period
- 2.4×
- faster iOS cache-hit builds on average
- 3→1
- analytics systems unified into a single interface
Release Automation
20x faster builds in a week.
Expo or bare React Native, we set up self-hosted CI/CD with build caching on your infra. No added infra cost.
We had been struggling with React Native application performance until we met Callstack.
Book a call
We’ll connect you with the right expert within 24 hours.
Still have questions?
Let’s find the right path for your product.
What's the benefit of using remote caching?
Remote caching lets builds reuse compiled outputs and artifacts across machines, which cut Expensify's builds from 25 minutes to 90 seconds and speeds up validation on both platforms.
Can you help us build a release system that runs fully on our infrastructure?
Yes. We rebuild your CI/CD, OTAs, and rollbacks to run fully on your own infrastructure, giving you complete ownership of build, release, and recovery with no third-party lock-in.
Can you automate app store submissions as part of CI/CD?
Yes. Store submissions are part of the continuous delivery pipeline we set up, alongside rollouts, feature flags, and A/B tests, for faster and safer delivery.
How do you coordinate multiple teams shipping in parallel?
We set up scalable pipelines with feature flags, A/B tests, and staged rollouts, so teams can ship independently without sacrificing performance, consistency, or control.
How do OTA updates and rollbacks work without a third-party provider?
We set up self-hosted over-the-air updates with staged rollouts, rollback, and secure delivery, all running on your infrastructure. No third-party update provider is involved.
What is Rock, and can we audit and extend it?
Rock is our open-source framework at the core of the pipeline: a drop-in replacement for the React Native Community CLI that your team can audit and extend. It works whether you use Expo or bare React Native.
Does this add infrastructure cost?
No. We set up self-hosted CI/CD with build caching on your own infrastructure with no added infrastructure cost, and reusable artifacts cut the redundant builds that waste compute.
