James Siminoff

CEO and Chief Inventor, Ring

Jamie is currently the CEO and Chief Inventor of Ring. He is also the Founder and CEO of the design laboratory, EdisonJr. Previously, Jamie was the Co-Founder and CEO of Unsubscribe, Inc. Unsubscribe.com is a technology platform to stop unwanted e-mail at the source. Before that, Jamie founded PhoneTag, the first voicemail to text service in the U.S., which was acquired by Ditech Networks (Nasdaq:DITC) in 2009. Prior to PhoneTag, Jamie founded and is still an active advisor to NobelBiz, a provider of telecommunications services to contact centers. Jamie has received numerous awards for his entrepreneurial accomplishments including being recognized as one of New York’s top six entrepreneurs by Crain’s Magazine (2007) and Laptop Magazine’s top ten mobile mavericks. Jamie holds a bachelor’s degree in entrepreneurship from Babson College in Wellesley, MA and went to Harvard Business School in Cambridge, MA where he bought a t-shirt that he still wears today.

Articles by James Siminoff

Build Alignment Before You Burn Out

Everything Feels Urgent At early-stage companies, everything feels urgent: shipping product, closing customers, raising money. In that environment, planning can feel like a luxury, or even a liability. In my...

How To Use Reddit To Scale Organic Growth For Your Startup

In this Mucker Growth Series session, Colin Belyea, founder of Karmic and an expert in Reddit organic growth, breaks down how Reddit has become one of the most influential discovery...

Sales Comp Kick Start: Keys to Getting It Right as You Begin to Build Your Sales Team

Webinar Recap featuring Donya Rose, Managing Principal from The Cygnal Group Sales compensation is one of the most critical aspects of building a successful sales organization. Many early-stage founders stumble...

Austin Tech Week 2025 Recap

Mucker Capital hosted two powerful days of programming during Austin Tech Week, bringing together founders, operators, and growth leaders to share real-world insights from the startup trenches. Across four sessions,...

LA Tech Week 2025 Day 3 Recap: AI Search – Wednesday Oct 15

After two packed days exploring AI startup building and go-to-market growth, Day 3 of LA Tech Week shifted focus to the evolving world of AI Search, how new AI technologies...

LA Tech Week 2025 Day 2 Recap: Startup Growth – Tuesday Oct 14

After a packed AI Building Day, we continued LA Tech Week with Startup Growth Day, a full schedule of sessions focused on go-to-market strategy, founder journeys, and scaling startups in...