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• Contact : Connect with Zain Jaffer. Find him on LinkedIn, X, and Instagram.
• Now: What Zain Jaffer Is Working On : Entrepreneur and investor Zain Jaffer on his current focus: building a new AI startup, making sense of where AI is headed, and founder life with a newborn.
• Start Here : Zain Jaffer co-founded Vungle, grew it to $400M+ revenue, then sold to Blackstone for $780M. He now invests via Blue Field Capital and Zain Ventures.

Best Posts

Start here. These are the posts Founders share with each other, drawn from actually building and raising. "How I Turned a $7M Offer Into $17M by Writing My Own Term Sheet" covers what happened when I raised Vungle's Series B and sent the VCs my own terms. If you read nothing else here, read these first.

• The Real Schedule of a Startup Founder With a Newborn : Zain Jaffer ran an AI startup at 38 with a newborn, on 3-hour sleep cycles, investor calls with a burp cloth, and coding between diaper changes.
• Founders Financial Blindness : Zain Jaffer checked Vungle bank balance daily and caught an embezzler early. Not knowing your burn rate is one of the most dangerous founder mistakes.
• How Jack and I Turned a Bad Startup Into a $780M Exit : A co-founder embezzled funds and locked the team out, forcing Zain Jaffer to pivot. That pivot became Vungle, which sold to Blackstone for $780M.
• Why Most GenAI Startups Won’t Last : Most GenAI startups are prompt wrappers with no lock-in as labs enter the app layer. Zain Jaffer details the patterns he sees across founders and VCs.

AI

I write about artificial intelligence from the perspective of someone who invests in AI companies and is building one. Posts like "The AI Unicorn Playbook: 3 Common Strategies" and "3 Common Mistakes Killing AI Startups" come from studying what actually works and what quietly fails. "The AI Unicorn Playbook" came from studying many new AI unicorns and noticing 3 things they have in common that are driving their growth and valuations. Patterns matter more than hype.

• The Generational Trap That Costs Founder Dads Everything : I'm running an AI startup which means I weigh 200lb and work crazy hours. The only thing giving me balance right now is my family. Many evenings, I have…
• What Happens If the US Government Owns 50% of OpenAI and Anthropic? : Zain Jaffer asks what could happen to OpenAI and Anthropic if the US government took a 50% stake, pointing to Intel's run after the 2025 government buy.
• Anthropic Just Voided Millions in Secondary Market Shares : Anthropic declared secondary-market SPV transfers void, leaving buyers on Forge and Hiive holding worthless paper. Zain Jaffer breaks down the fallout.
• How Coding From My Phone Became My Most Productive Habit : Zain Jaffer codes from his phone before bed using Claude Code, replacing social media scrolling with engineering work and sharper thinking.
• Your AI Startup Isn't Safe in the Application Layer : Mistral zeroed out ElevenLabs with a free voice model. Zain Jaffer explains why AI app-layer startups face an existential threat from model providers.
• Why Content Writers Will Become AI's Most Valuable Asset : AI agents run on plain English: system prompts and workflow instructions. Zain Jaffer argues skilled writers, not engineers, should be authoring them.
• Why Google's Project Genie Has Me Convinced We Live in a Simulation : Google Project Genie renders reality on demand, not from a pre-built world, mirroring a simulated universe. Zain Jaffer explains why this convinced him.
• The AI Unicorn Playbook: 3 Common Strategies : Zain Jaffer identifies three traits of fast-growing AI companies: usage-based pricing, self-serve onboarding, and paid media budgets for early traction.
• 3 Common Mistakes Killing AI Startups : Hard-coded prompts, API wrappers, and under-monetized data are patterns Zain Jaffer sees killing AI startups when model providers enter the app layer.
• Why Most GenAI Startups Won’t Last : Most GenAI startups are prompt wrappers with no lock-in as labs enter the app layer. Zain Jaffer details the patterns he sees across founders and VCs.
• The GenAI Arbitrage Trap : Lean AI startups at $10M+ ARR with three people exploit a temporary gap. Zain Jaffer argues the freeze after early traction is what kills them.

General

Posts that do not fit one lane. The personal stuff behind the company building, like "The Real Schedule of a Startup Founder With a Newborn" and "My Mum Just Exposed the ARR Problem Most Founders Won't Admit." The things most Founders feel but won't say out loud.

• From Rock Bottom to a $4B NASDAQ Listing: The Vungle Story : Zain Jaffer on the Vungle story: the company he started out of college, sold to Blackstone in 2019, listing on the NASDAQ at a roughly $4B valuation.
• My Mum Just Exposed the ARR Problem Most Founders Won't Admit : When Zain Jaffer told his mum they hit $1M ARR, she spotted the flaw: quarterly prepay times four is not recurring revenue if customers can cancel.
• The Real Schedule of a Startup Founder With a Newborn : Zain Jaffer ran an AI startup at 38 with a newborn, on 3-hour sleep cycles, investor calls with a burp cloth, and coding between diaper changes.

Investing

Investing posts from the perspective of an active angel and venture investor. I write about where I see real opportunity, what goes wrong between founders and investors, and the patterns that repeat across my portfolio. "The Best AI Investments Are Hiding in Plain Sight" came from watching some of my startup investments sit at less than $1M in annual recurring revenue for years, then suddenly break out. The best deals were not the obvious ones.

• Why Most Advisor Roles Should Actually Be Consulting Gigs : Zain Jaffer never hired an advisor for equity and regrets the times he served as one. He argues a defined scope and a flat fee works far better.
• How I Turned a $7M Offer Into $17M by Writing My Own Term Sheet : For Vungle Series B, Zain Jaffer gave VCs a term sheet with only amount and valuation blank. Seven investors competed and the round closed at $17M.
• The Best AI Investments Are Hiding in Plain Sight : Older startups growing 3x yearly with AI are dismissed by VCs chasing zero-to-$1M stories. Zain Jaffer argues they offer the best risk-adjusted returns.
• When Founders Turn Against Their Investors : A founder Zain Jaffer backed threatened legal action over a routine financials request, citing no YC SAFE information rights. Zain explains the fallout.

Startups

I write about startups. The operational stuff, the founder mistakes, the things nobody talks about until it is too late. Posts like "Why Every Founder Needs an Immaculate Data Room" and "Work-Life Balance Is Broken" come from building companies and watching others build theirs. "Why Every Founder Needs an Immaculate Data Room (Before It's Too Late)" is advice I give every founder: always maintain a data room that is in perfect condition. You do not want to scramble when a deal shows up.

• Your AI Startup Isn't Safe in the Application Layer : Mistral zeroed out ElevenLabs with a free voice model. Zain Jaffer explains why AI app-layer startups face an existential threat from model providers.
• We Hit $1M ARR in 7 Months. Why Do I Feel So Bad? : Zain Jaffer's startup hit $1M ARR in seven months, yet faster AI competitors, fear of OpenAI encroachment, and fickle budgets make celebration hard.
• Startup Now Homeless : Zain Jaffer was evicted from Industrious co-working after guerrilla marketing drew 65 attendees and violated the venue code of conduct.
• The Real Schedule of a Startup Founder With a Newborn : Zain Jaffer ran an AI startup at 38 with a newborn, on 3-hour sleep cycles, investor calls with a burp cloth, and coding between diaper changes.
• Why Most Advisor Roles Should Actually Be Consulting Gigs : Zain Jaffer never hired an advisor for equity and regrets the times he served as one. He argues a defined scope and a flat fee works far better.
• Why Startups Should Never Hire Product Managers : At Vungle, hiring PMs produced a sales-driven roadmap and useless features. Zain Jaffer argues only a founder or CEO can own product strategy.
• Why Every Founder Needs an Immaculate Data Room (Before It's Too Late) : Buyers demand IP assignments, contracts, and board consents when a deal starts. Zain Jaffer explains how a clean data room keeps deals from collapsing.
• Work-Life Balance Is Broken : Zain Jaffer went from martial arts to gaining 30 pounds in one year after relaunching a startup. He explains why founder health deteriorates so fast.
• Your Bug Fix Time Is Your Success Clock : Zain Jaffer uses bug response time as an investor signal: founders who fix issues in minutes show execution DNA that scales across product and growth.
• Our AI Startup's First Office : After months in coffee shops, Zain Jaffer moved his stealth AI startup into its first office, gaining stable WiFi, multiple screens, and meeting space.
• Founders Financial Blindness : Zain Jaffer checked Vungle bank balance daily and caught an embezzler early. Not knowing your burn rate is one of the most dangerous founder mistakes.
• Why You Should Never BCC Important Introductions : Moving an intro-maker to BCC leaves no leverage when they go silent. Zain Jaffer explains why keeping them CC on key investor intros raises reply rates.
• Two Paths to Startup Success in Today's Market : Series A VCs now demand $3M+ ARR. Zain Jaffer outlines two strategies: disciplined bootstrapped profitability or blitzscaling past that threshold fast.
• How We Hit $100K ARR in 6 Weeks While Staying Stealth : Two weeks after $50K ARR, Zain Jaffer's startup crossed $100K ARR while staying in stealth, prioritizing customer retention over a public launch.
• 5 Things I'm Doing Differently in My New AI Startup : Zain Jaffer outlines five departures from his last company: skipping discovery, hiring before launch, and other contrarian moves in his new AI venture.
• $50K ARR in 30 Days: Building Services as Software : Zain Jaffer hit $50K ARR in month one by pairing AI agents with human talent, growing from one design partner to five in a services-as-software model.
• How Jack and I Turned a Bad Startup Into a $780M Exit : A co-founder embezzled funds and locked the team out, forcing Zain Jaffer to pivot. That pivot became Vungle, which sold to Blackstone for $780M.
• How to Become a Better CEO : Four external boards sharpened how Zain Jaffer reads VC dynamics and governs his company. He explains why every CEO-founder should take on board seats.
• How One Question Transformed My $1K Service Into a $10M Business : Video ads for $1,000 had a clear ceiling. Asking what customers would pay for installs rather than video pivoted the business toward user acquisition.
• How I Raised $2M With Just a Deck : With no product or team, Zain Jaffer pitched a mobile video ad category to Tim Draper and Maynard Webb. That $2M round launched Vungle to a $780M exit.

More Articles

• Why Founders Who Ghost Their Investors Are Failing at Everything Else Too : Less than half the startups I've invested in send me regular investor updates. The bar is unfortunately very low these days to be considered a founder…