Stakk

Stakk specializes in mobile-first application development, with particular expertise in iOS, Android, Flutter, and React Native. The agency has earned recognition for its work designing and developing scalable mobile applications across diverse industries including medical, education, financial services, and eCommerce. Founded in 2020 and headquartered in the United Kingdom, Stakk has grown to a team of 21-30 professionals, with an additional office in Orlando, Florida staffed by 2-5 employees. The agency's client roster spans organizations of all sizes, from startups to enterprise companies generating over $1 billion in revenue. Notable clients include LNER Trains, The British Museum, Safestyle, Lapland, and Tracker. This breadth of experience allows Stakk to adapt their approach whether working with emerging ventures or established brands with complex requirements. Their service focus reflects clear priorities: mobile app development accounts for 65% of their work, followed by AI development at 25%, and UX/UI design at 10%. Stakk's technical capabilities extend beyond mobile platforms to include backend technologies such as Node.js, Python, and .NET Core. The team offers comprehensive product development services including product design, product management, and QA testing. With a Clutch rating of 4.9 out of 5.0 based on 29 reviews, the agency has built a reputation for delivering quality work across multiple technology stacks and industry verticals.