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DOOR3

Software, UX design and AI consulting for legal, insurance and finance firms

United States, New York51-200 peopleFounded 2002

About

DOOR3 builds custom software for mid-sized and large organisations from its base in New York, with a second office in Barcelona. Its work spans technology consulting, UX and UI design, and software development, including mobile apps, client portals, legacy system modernisation and rescue of stalled projects. It also offers a consulting CTO or CIO service and technical discovery before a build starts.

The firm has added an AI practice that covers readiness assessments, agentic workflows, process automation and predictive machine learning. For the legal sector it offers its own AI agents, ARIA and MIRA. Published case studies include a data dashboard for PepsiCo built on Snowflake and Mapbox, a business intelligence interface for AIG and a firm-wide intranet for the law firm Cadwalader.

DOOR3 mainly serves legal, insurance, financial services, construction, manufacturing, education and nonprofit clients, along with fintech start-ups and consumer brands. Projects usually begin with a discovery phase and then move to lean, agile delivery with design and engineering in one team.