About Door3
20+ year software development firm delivering 500+ projects across retail, fintech, and insurance with offices in US and Switzerland.
Door3
Modernizing businesses through AI, data, and innovative software solutions.
Editorial Review
Our take on Door3
Door3 has delivered over 500 projects since 2002, accumulating institutional knowledge across retail, financial services, and insurance sectors. Their two decades of continuous operation provides stability and proven processes, while offices in New York, Texas, and Switzerland enable them to serve US enterprises with European presence requirements or global technology initiatives.
The company's technical capabilities span web and mobile development, cloud architecture, and systems integration, with particular experience in e-commerce platforms, payment processing, and customer-facing applications. Their retail expertise includes omnichannel commerce, inventory management integration, and customer experience optimization, while fintech capabilities cover digital banking, investment platforms, and insurance technology.
Door3's delivery model combines agile development with established project management frameworks, providing clients the flexibility of iterative development within the governance structure that enterprises require. Their experience with complex integrations—connecting new applications to legacy systems, third-party APIs, and enterprise platforms—proves valuable for organizations with existing technology ecosystems.
Companies evaluating Door3 should consider their substantial project track record, vertical expertise in retail and financial services, and international presence for global initiatives. They're well-positioned for mid-to-large retail companies building e-commerce or customer experience platforms, financial services firms developing digital products, or insurance companies modernizing customer-facing systems. The established firm provides process maturity and stability but may lack the cutting-edge innovation focus of smaller boutiques. Best suited for organizations valuing proven delivery capability and industry expertise over bleeding-edge technology experimentation.
Badges & Credentials
Verified credentials and recognition earned by Door3
5 badges
Verification
Verified
This agency has a verified website presence.
LinkedIn Verified
This agency has a verified LinkedIn company page.
Recognition
Top Rated
This agency has an exceptional AgencyCluster score of 80+.
Experience
15+ Years
Established in 2002. Over 15 years of experience.
Company
Mid-Size
Medium (51-200)
Awards & Recognition
Rankings earned on AgencyCluster
10 awards
About Door3
Common questions about Door3.
Where does Door3 rank on AgencyCluster?
Door3 has earned rankings on 10 AgencyCluster lists: Top 10 AI/ML Development in New York, Top 25 Custom Software Development in New York, Top 10 Product Engineering (SaaS) in New York, and 7 more. Their highest AgencyCluster Score is 85/100. Rankings are merit-based and determined by evidence across six evaluation pillars — agencies cannot pay for higher positions.
What are Door3's strengths according to AgencyCluster?
In our evaluation for App Modernization & Legacy Migration, Door3 scores 85/100 overall. Their strongest areas are Category Fit, Freshness, Credibility, Proof of Work & Outcomes, Reputation, Delivery Maturity. A high Outcomes score means they have verifiable case studies with measurable results — the most heavily weighted factor in our methodology.
How long has Door3 been in business?
Door3 was founded in 2002, giving them over two decades of experience in product engineering (saas). In an industry where many agencies are less than 5 years old, 24+ years of sustained operations signals stability, client retention, and the ability to adapt through multiple technology cycles. Today, the team is mid-size.
Is Door3 a full-service agency or a specialist?
Door3 is listed across 6 categories on AgencyCluster: Product Engineering (SaaS), AI/ML Development, Custom Software Development, Web Development, App Modernization & Legacy Migration, Legacy Modernization. This indicates a full-service or multi-discipline capability. Multi-service agencies can be advantageous when your project spans several disciplines (e.g., design + development + marketing). However, check their scores per category — an agency may be strong in web development but less specialized in, say, AI/ML. Product engineering agencies think like CTOs — they consider scalability, technical debt, security, and operational readiness from day one. This prevents the costly 'rebuild from scratch' moment that hits many startups at scale.
What does a typical product engineering (saas) project cost with an agency like Door3?
A SaaS MVP costs $80K–$300K. Full product engineering with dedicated teams runs $30K–$80K/month. Post-launch iteration and scaling typically costs $20K–$50K/month. These are industry benchmarks for product engineering (saas) agencies at the level AgencyCluster curates. Actual pricing for Door3 will depend on project scope, timeline, and complexity — contact the agency directly for a custom quote.
Is Door3 a verified agency?
Yes. Door3 has been vetted and verified by AgencyCluster's editorial team through a rigorous, multi-factor review process. Unlike self-serve directories, AgencyCluster does not accept automated submissions — every agency is evaluated manually before being published. Our vetting covers identity verification (website, LinkedIn, domain age), business legitimacy (years of operation, team size, registered presence), evidence of work (case studies, portfolio, client outcomes), reputation checks across third-party platforms, activeness and freshness of their online presence, and screening for red flags including misconduct, fraud, or misleading claims. Agencies that fail any critical check are not listed. For Door3, verified signals include a functioning website, LinkedIn company profile, 24+ years of operating history (founded 2002), 10 earned rankings on curated top lists.