BrillMark is a San Francisco Bay Area-based software development and conversion rate optimization agency focused on helping brands and agencies build, test, and improve digital experiences. Founded in 2016, the company operates with a distributed team of developers, designers, quality assurance specialists, analysts, and optimization professionals.

Its core strength is high-velocity A/B test development, including complex experiments, multivariate testing, personalization campaigns, platform implementation, analytics tracking, and post-launch quality assurance. BrillMark works across leading experimentation and digital platforms, including Optimizely, VWO, Convert, Kameleoon, AB Tasty, Adobe Target, Shopify, WordPress, BigCommerce, WooCommerce, GA4, Google Tag Manager, Mixpanel, Hotjar, Microsoft Clarity, and Contentsquare.

Beyond experimentation, BrillMark provides Shopify and WordPress development, full-stack web development, CRO strategy, UI/UX and test mockup design, performance optimization, analytics setup, technical support, and dedicated development resources. The team can support individual projects, provide blocks of development hours, or operate as an ongoing extension of a client’s internal or agency team.

BrillMark serves organizations across e-commerce, technology, finance, healthcare, SaaS, digital marketing, and other sectors. Its positioning emphasizes fast turnaround, reliable execution, platform-agnostic expertise, transparent collaboration, and flexible engagement models tailored to each client’s testing and development needs.