Winning Product / Winning Startup

About the Substack

Helping to turn inspirational startup ideas into successful, market-ready products.

Free Subscription Benefits

  • Occasional Public Newsletters

Paid Subcription Benefits

  • Subscriber-only post content
  • The Product-Market Fit Readiness Assessment (1 to Keep or Give Away), Product Discounts
  • Annual & Founder Only: Startup Funding Decoded (PDF Guide), 1 Mos. (4), Group Mentoring Sessions

Paid Subscription Plans

  • $9 a month
  • $80 a year

About Jim Berkowitz

5X founder with 40 years of experience helping smart, driven, early-stage AI and SaaS founders, indie hackers, and solopreneurs stuck in the gap between an idea and traction.

Is this your Substack? Submit changes.

Winning Product / Winning Startup's recommended Substacks

next play logo
Ben Lang

next play

We help people find their next play by sending opportunities, hosting gatherings, and curating content.

1000+
paid subscribers
91K+
free subscribers
Lenny's Newsletter logo
Lenny Rachitsky

Lenny's Newsletter

Deeply researched product, growth, and career advice for product leaders, founders, and ambitious builders.

10K+
paid subscribers
1.2M+
free subscribers
A Manager's Playbook by Bastian logo
Bastian

A Manager's Playbook by Bastian

Unlike leadership gurus who overwhelm you with theory, or influencers who only inspire, I give first-time managers copy-paste scripts, tools, and stories that make leadership feel simple, doable, and confidence-building.

The VC Lens logo
Sayanee Bhowmik

The VC Lens

A platform for first-time founders to learn how VCs think & evaluate startups so they can raise faster on better terms

2K+
free subscribers
Everyday Genius logo
Taryn Voget

Everyday Genius

For anyone chasing the quiet feeling that theyโ€™re meant for something more, this newsletter is your breadcrumb trail. Twice a month, youโ€™ll get stories, strategies, and soul-level insights to help you do the genius work youโ€™re truly here to do.