Co-Founder at Equity Matrix
Sebastian is a product leader with over a decade of experience building digital products. He co-founded and sold Nucleus, a remote collaboration platform for group learning and masterminds, where he experienced firsthand the pain of negotiating equity with co-founders: the 50/50 trap, dead equity from departed contributors, and lawyers who didn't understand dynamic models.
After seeing how broken equity was, from his own co-founder negotiations to job offers with insultingly low equity packages, he knew dynamic equity was the answer. But the tools on the market had limited functionality, no legal structure, and didn't come across as serious platforms that founders or investors would trust. So he assembled a team of startup veterans to build Equity Matrix. Fair co-founder splits are just the starting point. The bigger vision is to make meaningful equity ownership accessible across the full employee spectrum, because he believes broader ownership is the most direct way to reverse the growing wealth gap.
He writes about startup equity, dynamic ownership, and why the way we share equity needs to change.
In 1985 the biggest US company, IBM, was worth about $91 billion. Today the biggest, Nvidia, is worth nearly $5 trillion, and the top 10 make up a record 42% of the S&P 500. The value exploded. The ownership concentrated. Here's what that means for everyone else.
Firing a co-founder is legally and emotionally brutal, and the equity is the part that haunts you. Here's how to do it right, what vesting and cliffs actually protect, and how to avoid leaving a dead stake on your cap table.
A CTO who co-founds usually gets 20-50%. One who joins later gets 1-5%. The gap comes down to timing, risk, and whether they built the thing or just run it. Here's how to land on a number.
Adams called wealth a monster. Jefferson said the earth belongs to the living. What the founders got right about fairness — and how dynamic equity finishes the thought.
Equity isn't just a startup problem. Here's how partnerships, LLCs, and S-corps handle ownership — and which structure protects you when contributions aren't equal.
Default equity splits, formation costs, community property, and vesting rules differ dramatically between the US and Europe. A practical comparison for founders building across borders.
Most small businesses start with a handshake and figure out equity later. By the time they realize they need an agreement, the damage is already done. Here's why you need one now.
We studied 150+ real co-founder departures. 28% ended in litigation, only 35% were clean exits, and vesting was the single biggest predictor of outcome.
Profits don't have to follow ownership percentages in an LLC. Here's how to structure profit sharing that reflects what each partner actually contributes.
Adding a partner to a business you already own? Here's how to structure the deal, value the business, and protect yourself legally.
We evaluated 200+ real equity split discussions across Reddit, HN, and Indie Hackers. Most founders wing it, most regret it, and almost nobody tracks contributions. Here's the data.
Find the best Slicing Pie alternative for contribution-based equity: Equity Matrix, SliceFair, WE.VESTR, Cake Equity, Vestd, spreadsheets, and cap table tools.
When one business partner invests time and the other invests money, how do you split ownership fairly? A practical guide for LLCs and partnerships.
A practical guide to buying out your business partner, from valuing the business to structuring the deal and avoiding costly mistakes.
LLC ownership doesn't have to be 50/50. Here's how to split membership interests based on cash, time, skills, and ongoing contributions.
When one partner does all the work while the other collects half the profits, resentment builds fast. Here's how to address it before the partnership implodes.
Your first hire is the hardest equity decision after the co-founder split. Here's how to structure it so you attract the right person without giving away too much.
A 409A valuation sets the fair market value of your startup's common stock. Here's when you need one, what it costs, and the penalties for skipping it.
Your equity percentage means nothing without a dollar value behind it. Here's how to estimate what your shares are really worth based on your business type and revenue.
A time-based action plan for when a co-founder reduces their commitment or leaves. What to protect, what to discuss, and how to keep your startup alive.
A structured framework for startup founders to evaluate whether equity splits still reflect reality. Two axes, nine outcomes, and clear actions for each.
Phantom equity pays like ownership without giving up actual shares. How phantom stock plans work for LLCs and service businesses, tax treatment, and when it beats real equity.
A complete co-founder agreement template covering equity, vesting, IP, departures, and more. See exactly what each section should say and why it matters.
Word-for-word scripts for splitting equity with a technical co-founder. What to say, how to frame the conversation, and how to protect the relationship while getting to a fair split.
Cap table management is more than a spreadsheet. Learn when to upgrade your tools, what mistakes to avoid, and how dynamic equity fits into the picture before you raise.
The standard 4-year vesting schedule with a 1-year cliff, explained. How cliff, graded, and reverse vesting work, plus acceleration clauses, 83(b) elections, and what to negotiate.
A step-by-step guide to building your startup's cap table from scratch, managing it through funding rounds, and avoiding the mistakes that cost founders equity.
A step-by-step guide to using the Slicing Pie calculator. Learn how market rates, multipliers, and contribution types affect your equity split, with real examples.
You don't have to choose between dynamic equity flexibility and C-corp tax benefits. Start with an LLC, convert when you're ready, and exit with up to $15M in tax-free gains. Here's the playbook.
How to value a pre-revenue startup: Berkus method, scorecard method, cost-to-duplicate, and comparable transactions. Which method works at which stage, with examples.
Dan Martell teaches founders to buy back their time by delegating. But how do you compensate the people who take that work off your plate when you can't afford salaries? Dynamic equity.
OpenAI pays $1.5M/employee in equity. xAI's pool is 12%. Tender offers up 60%. The AI compensation arms race is rewriting the rules for every startup trying to hire.
Rob Walling's TOC framework splits equity based on Time, Opportunity Cost, and Cash. Here's how it works, how it compares to Slicing Pie, and how to use it with a calculator.
A cap table tracks who owns what in your company. Here's what it includes, why investors care about it, and how to manage it from day one.
The FTC officially dropped its nationwide non-compete ban in September 2025. Here's what happened, what it means for your co-founder agreements, and what to do now.
A practical comparison of convertible notes and SAFEs: how each works, when to use them, and how they affect founder dilution. The complete guide for early-stage fundraising.
Founders think dynamic equity is complicated. It's not. Tracking time and cash is simpler than the alternative: a co-founder blowup over an unfair split.
The One Big Beautiful Bill Act reduced the QSBS holding period from 5 years to 3 and raised the exclusion cap to $15M. Here's what changed and how it affects your equity.
The House passed a bipartisan capital formation package that could change who can invest in startups, how you raise on demo days, and crowdfunding limits. Here's what founders need to know.
How SAFE notes actually work: conversion mechanics, valuation caps vs. discount rates, how much they dilute founders, and the terms you should negotiate before signing.
Practical benchmarks for employee equity grants by role, seniority, and company stage. Learn typical ranges for engineering, product, sales, and executive hires.
How equity calculators determine fair ownership splits based on time, cash, and other contributions. Understand the methodology behind contribution-based equity models.
The definitive guide to splitting startup equity among co-founders. Learn contribution-based approaches, common mistakes, and when to use dynamic equity instead of fixed splits.
Equity splits for bootstrappers are different. No VCs, no massive exits, no standard playbook. Here's how to split equity when you're building a lifestyle business or bootstrapped startup.
73% of co-founder conflicts stem from poorly designed equity splits. Here are the red flags that indicate your split is unfair, with real examples from Facebook, Snapchat, and Twitter.
Startup attorneys are divided on dynamic equity. Some say it eliminates disputes. Others say investors hate it. Here's what the legal experts actually think, and who's right.
New tax law changes make it easier to trigger the Alternative Minimum Tax when exercising ISOs. Here's what changed, how to calculate your exposure, and strategies to minimize the hit.
Salaries pay the bills. Equity builds generational wealth. Here's why ownership matters more than most people realize, and why it's still not distributed fairly.
DEI frameworks measure hiring, pay, and promotion. But they ignore the biggest wealth-builder of all: equity ownership. It's time to expand the equity matrix.
From 50/50 splits to dead equity to paying lawyers who didn't help, here's the full story behind Equity Matrix and why fair ownership needs better tools.
Between 2022 and 2023, startup equity grants dropped 26%. The market has recovered, but equity hasn't. Here's what that means for founders and employees.
Slicing Pie has 12 problems the book doesn't warn you about: no cliff, hourly rate disputes, time inflation, investor confusion, and more. Here's what breaks and how to fix it.
AI startups face unique equity challenges. When GPU costs dwarf salaries, how do you fairly split ownership between capital and contribution? A framework for AI founders.
The two-founder startup is the most common configuration. Here's how to split equity fairly without defaulting to 50/50 or making it up as you go.
Most startups shouldn't raise VC. Learn the honest criteria for VC-fundable businesses and when bootstrapping with dynamic equity is the smarter path.
Want to sell startup shares before an IPO? Compare Forge, EquityZen, Hiive, and EquityBee. How secondary markets work, what they cost, and who qualifies.
The slow fade is more common than the dramatic exit. Here's how to recognize when a co-founder has checked out and what to do about it.
Everything startup employees need to know about Incentive Stock Options: how they work, the AMT trap, when to exercise, early exercise strategies, and how to avoid costly mistakes.
A complete comparison of equity types including ISOs, NSOs, RSAs, RSUs, LLC membership units, and share classes. Understand tax implications, pros, cons, and when to use each.
From Carnegie's libraries to MacKenzie Scott's no-strings giving, the world's biggest philanthropists share one thing: they built wealth through equity before giving it away.
How did we get from sole proprietors to cap tables? The history of equity explains why ownership looks the way it does today and how startups changed the game.
Ready to use dynamic equity? Here's exactly how to implement the Slicing Pie model, from initial setup to daily tracking to eventual conversion.
The 83(b) election lets you pay taxes now on equity worth little, avoiding massive tax bills later. Here's exactly what it is, when to file, and why it matters.
Corporations create taxable events every time you issue shares. LLCs let you adjust ownership daily without tax headaches. Here's how the entity choice affects your equity structure.
Gig workers power the modern economy but can't access the one thing that builds generational wealth: equity. Here's why that needs to change.
How the Slicing Pie model works: formulas, GHRR calculations, multipliers, and real examples. Plus the problems Mike Moyer's book doesn't cover and how to solve them.
Investors scrutinize cap tables before writing checks. Learn the ownership benchmarks by stage, red flags that kill deals, and how to structure a fundable cap.
Step-by-step framework for discussing co-founder equity splits. What to prepare, what to say, how to handle disagreements, and what to put in writing afterward.
Most founders overpay advisors. Carta's 2024 data shows median grants dropped to 0.21%. See updated benchmarks by stage, the FAST v3 framework, and 3 red flags to avoid.
Sweat equity lets founders earn ownership through work instead of money. Learn how to calculate fair value, avoid disputes, and handle the tax implications.
Sam Altman's Startup Playbook recommends nearly equal co-founder splits with one extra share to prevent deadlock. Here's what that advice means in practice and where it falls short.
Adding a co-founder after you've started is tricky. Learn how to calculate fair equity, structure vesting, and avoid the mistakes that create resentment down the road.
Adding a co-founder after starting solo changes everything. Learn when it makes sense, how to evaluate candidates, and how to structure the partnership.
Y Combinator says split equity equally. Noam Wasserman's research says that kills startups. Who's right? Both, depending on your team. Here's the nuance YC skips.
Dead equity is ownership held by someone who stopped contributing. It scares investors, demoralizes teams, and locks up your cap table. Here's how to prevent and fix it.
Dynamic equity doesn't always need to end. Learn the key triggers—investment rounds, key hires, founder exits—that signal it's time to freeze your startup's equity split.
Fixed equity locks in ownership on day one. Dynamic equity adjusts based on contributions. Here's how to choose the right model for your stage.
Google (50/50), Microsoft (64/36), Oracle (60/20/20), Instagram (60/40). How these co-founder splits survived — plus 6 companies where generous equity created employee millionaires.
Do investors dislike 50/50 equity splits? Yes — and here's the data. How equal splits create deadlock and resentment, what investors actually think, and the 51/49 alternative.
Paul Graham's equity equation tells you how much to give investors and employees. It says nothing about co-founder splits. Here's why, and what to do instead.
Eduardo Saverin lost Facebook. Reggie Brown sued Snapchat for $157M. Noah Glass got erased from Twitter. The equity mistakes that cost co-founders billions.
