Yellow Systems

Yellow Systems is a San Francisco-based software product agency that has established itself as a trusted development partner for YC startups, S&P500 companies, and businesses across various industries. With over 317 completed projects and a remarkable 90% client retention rate, the company has built a reputation for delivering high-quality custom software solutions. Their startup clients have collectively raised over $1.6 billion, and applications developed by Yellow Systems serve more than 20 million users worldwide. The company offers a comprehensive suite of services including AI/ML development, web application development, UI/UX design, penetration testing, quality assurance, and discovery phase consulting. Yellow Systems emphasizes a business-first approach, prioritizing client needs over technology choices to ensure solutions deliver genuine business value. Their structured development process spans from initial discovery through post-launch support and maintenance. With relationships spanning 10+ years with their longest-running clients and 85% of clients working with them for 5+ years, Yellow Systems demonstrates exceptional commitment to long-term partnerships. The company maintains perfect 5.0 ratings across 80 public reviews, reflecting consistent client satisfaction with their transparent communication, technical expertise, and ability to deliver projects on time and within budget.