The Combination Rule

We’re a product design studio.

What We Do

We launch and scale products and businesses.

Our Work

We are strategic builders. We make products that are easy to use and drive business outcomes.

Who we are

Senior operators who build products.

Jenny Cox


Jenny is an experienced product leader with 15 years building products, platforms, and businesses. A decade in NYC start-ups she enabled two growth stage software companies to pursue liquidity events (AppNexus acquired by AT&T & ideeli acquired by Groupon). Jenny specializes in testing, launching, and scaling products and marketplaces. Prior to start-up world she was a Strategy & Operations consultant at Deloitte.

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Joshua Long


Josh is a product and brand designer with over a decade of in house and industry experience. Josh is the creative lead behind the original Oscar Health platform, brand, and design team. Josh has also worked with Nike, R/GA, and Code and Theory on digital platforms, as well as teaching Digital Interaction Design to students at the School for Visual Arts in New York. Josh specializes in high-quality digital product and brand design that drives measurable business outcomes.

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Amy Pan


Amy is a product advisor and consultant to founders and executive teams. She has led product and design teams at early and growth-stage startups like Bread Finance, Contently and AppNexus for the last 10 years. Amy is also on the founding team of the Wharton Alumni Angel Network, where she chairs the screening committee. She began her career as an investment banker and private equity investor but left to build companies from nothing.

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News & Thoughts

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We’re happy to chat.