Callstack presents replay experiments achieving 8.8-second mobile QA flows
It details 20 repeated runs, 38 Maestro flows, and 36 repair trials, showing a 3:18 agent time reduced to 8.8 seconds via replay.
Latest Callstack News & Updates
See the latest news and media coverage for Callstack. We track all announcements, press releases, and industry mentions in real time, all in one place.
React Native and AI engineering services company
callstack.com- Headquarters
- Wrocław, Poland
- Founded year
- 2016
- Company type
- Private company
- Number of employees
- 225–500
- Industry
- IT Services & Consulting
Last updated
Latest news about Callstack
In short: Callstack acquired Margelo for over €20 million, secured US investment, and pivoted toward agentic SDLC automation and AI engineering.
Company announcements
Callstack made hybrid iOS apps compile 39% faster with React Native Brownfield
The update leverages prebuilt XCFrameworks from React Native 0.83+, reducing build times significantly especially for Expo projects.
Callstack introduces AI-supported brownfield migration to React Native
The framework reduces migration time from weeks to days, with AI handling setup, requirements, and testing, though human review remains essential.
Callstack announces Apex, a fast specialized model for React Native
Based on Gemma 4, it is trained for React Native engineering tasks, offering higher speed and lower cost. A private beta is available.
Media coverage
Wrocław-based Callstack with American investor. Shares of Lankauf and the Karwat brothers taken over by Viking fund
Callstack, a startup operating in the area of React Native and cross-platform application development, has entered into a strategic investment agreement with funds affiliated with Viking Global Investors — an American company...
Vienna's Margelo Joins Poland's Callstack in a Deal Valuing It Above 20 Million Euros
Polish software company Callstack is acquiring Vienna-based engineering firm Margelo. The two companies announced the deal just now, putting Margelo's...
Callstack to Demonstrate On-Device AI in React Native Apps | by Roman Fedytskyi | Medium
Callstack is hosting a live session to show developers how to run large language models on React Native apps, highlighting offline AI and...
Americans are buying Polish Callstack
The Wrocław software house was acquired by American Viking funds in a transaction valuing it at approx. 0.5 billion PLN. Some Polish investors exchanged shares...
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