Ari Engelberg

Former Co-founder, Stamps.com; Executive Director, BrightStar Charter Schools

Ari Engelberg has expertise in educational leadership and fundraising and has been teaching and coaching at Harvard-Westlake School for the past 14 years. He was also the Executive Director at Bright Star Schools from 2007 to 2015. Prior to being a teacher at Harvard, he co-founded Archive and served as its SVP of Corporate Development. Before Archive, he also co-funded Stamps.com, a website that provides all functions of the Post Office to users’ desktop. As the VP of Product Development and Web Operation, he was responsible for developing product specifications for Internet Postage v1.0 and for managing specification, design, implementation, and deployment of Stamps.com’s website, including its online commerce and customer support components. Ari holds a B.A. in Political Science and Psychology from the University of California, Berkeley, a JD from the UCLA School of Law, and an MBA from the Anderson School at UCLA.

Articles by Ari Engelberg

How to Build a Customer Support Function for Startups Using AI Tools with Alex Velinov

Delivering high-quality customer support can be one of the most resource-draining parts of a startup. The good news: we’re at a turning point where founders can use AI tools to...

Zero → 100: The Exact Steps We Took to Close Our First 100 Paying Customers

Going from zero customers to 100 in just four months sounds impossible—unless you’re a founder willing to roll up your sleeves and hustle relentlessly. I’m Gaurav Bhattacharya, co-founder of Jeeva.ai,...

Unblocking Startup Growth: Best Practices for Sales Discovery & Qualification with Richard Harris

Startups are in a constant race against time and resources, navigating complex sales environments with lean teams and limited margins for error. In a recent session from the Mucker Growth...

The LinkedIn Playbook: How Startup Founders Can Stand Out & Scale

This LinkedIn Playbook is based on insights from a recent one-time Mucker Growth Session webinar featuring LinkedIn growth experts Alec Paul (Founder of SalesBrand) and Kyle Williams (Founder of Brickstack)....

DeepSeek vs OpenAI: Comparison Breakdown and What It Means For Your Tech Startup With Dan Cleary

In this recent webinar of our Mucker Growth Series, we discussed the evolving AI landscape with Dan Cleary, founder of PromptHub. He provided an in-depth breakdown of DeepSeek vs. OpenAI,...

Building Product Without Knowing Code With Adam New Waterson

In a deep dive into AI-driven product development, Adam New-Waterson, a former CMO turned Chief Product Officer and now solopreneur, shared how non-technical founders can harness the power of AI...