Napkin Math

How Tally Hit $5M ARR by Staying Small & User-Obsessed

Maria Martinez, co-founder of Tally — a bootstrapped form builder that hit over $5M ARR since 2020 — joins Sabba and Charlie to break down how she and her husband Philip built a profitable SaaS business in a fiercely competitive market. From a failed hotel marketplace idea (killed by Covid in Bangkok) to launching a Notion-inspired form builder and growing it entirely through product-led growth, Maria shares the unfiltered story of what it really takes to compete without venture capital, a sales team, or a marketing budget. Timestamps 00:00:00 - Intro & Guest Welcome 00:00:59 - What is Tally & The Origin Story 00:07:48 - Competitive Landscape & Go-To-Market Strategy 00:11:16 - Free Tier & Product-Led Growth 00:27:00 - AI & LLM Discovery 00:34:13 - User Feedback & Metrics 00:54:27 - Life as Bootstrapped Co-founders 00:58:00 - Challenges & Churn 01:02:43 - Roadmap & Advice for Founders

How to Reduce Churn in Subscription Businesses

A practical breakdown of churn: what it is, why it varies by market, how to tell good churn from bad churn, and the product, marketing, pricing, and activation moves that reduce it. The episode focuses on identifying sticky users, improving time to value, and designing free plans and workflows that convert better. Timestamps: 00:00 - Intro to Churn 00:01:36 - What Churn Actually Means 00:04:15 - Good vs Bad Churn 00:10:45 - Different Types of Churn 00:12:47 - How to Reduce Churn 00:16:41 - Talking to Customers 00:24:11 - Workflow & ICP 00:26:07 - Marketing for Retention 00:34:21 - Free Plans & Pricing 00:38:32 - Activation & Time to Value 00:48:05 - Tactical Churn Fixes 00:56:43 - The Power of Negative Churn

How Yasser Bootstrapped Chatbase to $10M ARR in 3 Years

Yasir, CEO and solo founder of Chatbase, joins Saba and Charlie on the Napkin Math podcast to break down how he bootstrapped an AI customer support platform from a PDF chatbot side project to $10M ARR in just 3 years — starting before ChatGPT even launched. He shares the real story behind going viral, hitting $1M ARR in 4 months, the chaos of early growth, why he stayed bootstrapped, and how he thinks about building durable AI "harnesses" in a world where models improve every few months. Timestamps: 01:38 - Origin story — building before ChatGPT existed 14:04 - 0 to $1M ARR in 4 months 22:13 - Product evolution — PDF chatbot to B2B AI agent 31:05 - Why brand makes every channel easier 35:44 - What makes a great AI harness vs a mediocre one 43:48 - Moats in the AI era 52:43 - Bootstrapped vs raising — Yasir's decision 56:15 - Path to AGI through harness improvements 59:12 - Advice for new founders: operate like an agency

How Ben Pasternak took Sabba's App and made millions

A founder's stolen app, AI image gold rushes, and why London might just be the next Silicon Valley — all on the back of a napkin. Timestamps: 00:00 - Intro 00:41 - The stolen app story 08:54 - Lessons from the App Store 11:36 - Vibe shuffles & business opportunities 20:00 - Vibe coding education 24:36 - ChatGPT image model 28:31 - AI designer niches 37:36 - Cursor's $60B acquisition 40:57 - London Maxing movement

$1 Million Wellness Apps Hiding in Plain Sight

Saba and Charlie break down the $6.8 trillion wellness industry — period tracking, peptides, air quality, and sleep tech — then pivot to how the best founders (Dario Amodei, Brian Armstrong, Reed Hastings, Elon Musk) spotted emerging markets before anyone else. They close with a hot take on Anthropic's rumoured vibe coding platform and what it means for Lovable and Replit. Timestamps: 00:00 - Intro 01:06 - Wellness sector breakdown — the $6.8T opportunity 04:01 - Period tracking, peptides, air quality & sleep apps 25:30 - Building on Rising Tides — why bet on fast-growing markets 27:20 - Founders who got in early: Dario, Brian Armstrong, Reed Hastings, Elon 36:55 - AI agents, humanoid robots & the infrastructure plays 44:11 - Anthropic's vibe coding platform & impact on Lovable/Replit 49:00 - Anthropic's brand strategy