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Tomas Zezula

I help SaaS startups and product-led businesses build, fix, and scale their billing and subscription systems—especially with Stripe.

With 20+ years of engineering experience and a specialty in billing architecture, I guide teams through critical monetization milestones.


Articles

  1. The Real Problem with Usage-Based Billing Isn't Tracking – It's Proof medium.com
  2. What If Billing Logic Didn’t Live in Code Anymore? medium.com

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Products

Billing Atlas helps SaaS founders choose the right billing platform (Stripe, Paddle, MoR, etc.) without guesswork.

No vendor bias — just clear comparisons, real trade-offs, and practical guidance based on real-world experience.

Built for developers and founders who need to figure out billing fast.

👉 https://billingatlas.io

  1. Invoice Tracker

    I built a simple system to track unpaid invoices in Google Sheets and act on them with email follow-ups.