--- title: "Shipping products at AI speed | About Callstack" description: "We're an AI-native engineering company. We go after hard problems, push for real performance, and build the tools that become how everyone else works." url: https://www.callstack.com/about-us updated: 2026-10-26T09:17:48.156Z --- # Shipping products at AI speed | About Callstack We're an AI-native engineering company. We go after hard problems, push for real performance, and build the tools that become how everyone else works. React Foundation · 10 years on the market · 100+ Enterprise Clients ## Engineering for what comes next. We're an AI-native engineering company. We go after hard problems, push for real performance, and build the tools that become how everyone else works. ecosystem leaders ## We build software, and the standards behind it. Best practices are being rewritten daily. When adopting new technologies, you don't want a team learning the new standards. You want direct access to the engineers actively setting them. - React Foundation Founding Member · 300+ commits to React Native · Contributing since 2016 - 100+ Enterprise projects delivered - Industry runs on our tooling · 50M+ OSS downloads / month - [3.7× Lower task cost vs Opus 5.5](https://apex.callstack.com) - “I recommend them as a trusted tech partner for running complex projects.” — Jin Chung, Co-Founder, CTO / Rainbow · “Their engineers proved to be a crucial part of our mobile app relaunch project.” — Brian Aznar, Engineering Director / Major League Soccer · “I appreciate their attention to detail, flexible approach and a high degree of expertise.” — Glen Moriarty, Founder and CEO / 7 Cups · “The team at Callstack are the most experienced engineers in the React Native community.” — Nader Dabit, Senior Developer Advocate / AWS · “Their ability to deliver, and follow through, is unparalleled in the React Native ecosystem.” — Matt Hargett, Principal Software Engineer / Roblox - [5x Faster message sending time](https://www.callstack.com/case-studies/enhancing-applications-performance-for-expensify) - ISO 27001 certified letter from Callstack ## When the way software is built changes, we help companies adopt it. [Callstack Manifesto](https://www.callstack.com/technology) Callstack ORIGIN STORY ## Early to React Native. Early to Agents. Callstack was founded just months after React Native went public. Since then, we’ve contributed to the framework, grown the community, and helped teams ship cross-platform products at scale. In 2026, we made AI-native engineering the next chapter. - **2015** React Native is open-sourced by Meta, sparking a new era in mobile development. - **2016** Callstack is founded in Wroclaw, Poland, just months after React Native goes public. - **2018** We launch React Native EU, the first conference dedicated to React Native. - **2024** Callstack grows beyond 200 people, with teams working across countries, clients, and open source. - **2026** We launch our AI-focused offering, bringing agentic infrastructure, AI-native delivery, and enterprise AI adoption into the React Native stack. BACKED FOR THE LONG RUN ## Backed by Viking Global Investors for what comes next. In 2025, Viking Global Investors backed Callstack’s next stage of growth. That support lets us keep investing in the work that compounds: open source, React Native expertise, AI-native infrastructure, and senior engineering teams built for long-term client outcomes. [Read the news](https://www.callstack.com/news/callstack-secures-major-us-private-equity-investment-to-accelerate-global-growth) · [More about Viking](https://vikingglobal.com/private-equity/) JOIN US ## Build with agents before everyone else does. You'll work on the tools, infrastructure, and products defining AI-native engineering, alongside core contributors and open-source maintainers. [Join Us](https://www.callstack.com/careers) [Meet the team](https://www.callstack.com/team) Insights ## Worth your time, by engineers. - [React Native Wrapped 2025: A Month-by-Month Recap of The Year](https://www.callstack.com/blog/react-native-wrapped-2025-a-month-by-month-recap-of-the-year) (Article, 10/16/2026): 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. - [Efficient On-Device LLMs in React Native Done Right](https://www.callstack.com/events/efficient-on-device-llms-in-react-native-done-right) (Event, 11/17/2026) - [MCP and Supervisor Agents in eBay's Monitoring Workflow With Leonel Candido da Silva](https://www.callstack.com/podcasts/mcp-and-supervisor-agents-in-ebays-monitoring-workflow-with-leonel-candido-da-silva) (Podcast, 10/13/2026) - [Behavior Review for AI-Native Delivery](https://www.callstack.com/events/behavior-review-for-ai-native-delivery) (Webinar, 7/21/2026) - [Your AI Coding Agent Still Needs an Architecture](https://www.callstack.com/blog/your-ai-coding-agent-still-needs-an-architecture) (Article, 10/22/2026) [Explore Insights](https://www.callstack.com/insights)