DOOR3

Founded in 2002, DOOR3 is an independent technology consultancy and software developer headquartered in New York City, with leadership and delivery teams in New York and Kyiv. It advises companies on technology, builds applications and rescues projects that have stalled, with a growing emphasis on data and AI automation.

What DOOR3 offers

• Advisory — technology assessments, AI adoption roadmaps, digital strategy and consulting CTO or CIO leadership.
• Application buildout — rapid prototyping, custom application development and product management.
• Project rescue — stabilising stalled or underperforming initiatives and modernising legacy systems.
• AI automation — finding automation opportunities and putting practical AI tools into client workflows.
• Cloud and integration — moving systems to cloud platforms and connecting data flows between business applications.
• User experience design — research-led UX and UI design with front-end development.

Who it works with

DOOR3 works with large enterprises and startups across food and beverage, legal, education, insurance and IT. Named clients include PepsiCo, AIG, Munich Re, FreshDirect and the law firm Cadwalader, and case studies cover a bilingual delivery app for Leon Market and a teacher data tool for Achievement Network.

Key facts

• Based in: New York City, USA
• Founded: 2002
• Offices: New York and Kyiv
• Other: Runs DOOR3 Labs and the Open Hours talk series