Stakk
VerifiedLondon app development agency founded in 2016. 40+ person in-house team at 37 Lombard Street has delivered 120+ mobile and web projects for Amazon, Disney, Samsung, and the British Government.
About Stakk
Stakk was founded in London in 2016 and formally incorporated as STAKK LIMITED in February 2020. The agency operates exclusively with a senior in-house team — no outsourcing — from its Lombard Street address in the City of London. With 120+ completed projects and clients spanning enterprise brands (Amazon, Disney, Samsung, LNER) through to government and growth-stage startups, Stakk covers the full product lifecycle from strategy and UX through to native iOS, Android, React Native, Flutter, and web delivery. The company has positioned itself as a premium partner for clients who require senior resource and direct accountability, differentiating itself through a no-junior, no-outsourcing guarantee.
Why They Stand Out
100% senior in-house team with no outsourcing gives clients direct accountability on every engagement. City of London location and blue-chip client roster (Amazon, Disney, Samsung, British Government) validates enterprise credibility. React Native, Flutter, and native iOS/Android capability under one roof eliminates the need for multiple vendors.
Ideal For
UK enterprises and scale-ups seeking a London-based premium mobile partner with senior-only delivery. Organisations that need transparent project management and won't tolerate junior or offshore handoffs.
Potential Drawbacks (Honest Assessment)
Companies House incorporation date of 2020 means the limited company entity has a shorter formal track record than the claimed 2016 founding suggests. At 10–49 employees, bench depth for very large concurrent engagements may be limited. $50,000 minimum project size excludes early-stage startups.
Tech Stack
Platforms
Industry Expertise
Pricing Information
Company Details
Verification
Similar Agencies You Might Consider
GoodCore Software
London, United Kingdom
Croydon, London software development firm founded in 2005. 50-249 person team specialises in bespoke platforms and legacy modernisation for healthcare, fintech, education, and utilities with ISO 27001 and SOC 2 certification.
Closeloop Technologies
Mountain View, California
Mountain View, California software and mobile development firm founded in 2011, recognized as an Inc. 5000 fastest-growing company. Clients include LastPass, Cordance, Universal Tennis, and BioStem across enterprise automation and mobile platforms.
Diffco
San Jose, California
San Jose, California software development agency founded in 2008, serving 500+ clients across 1,150+ projects in mobile, web, and AI development. Notable clients include Instreamatic, Maze, NanaWall, and Happier.
Need Help Choosing?
Compare Stakk with other agencies side-by-side or explore more options in our directory.